General Permit
United States Environmental Protection Agency (EPA)
National Pollutant Discharge Elimination System (NPDES)
MULTI-SECTOR GENERAL PERMIT FOR STORMWATER DISCHARGES
ASSOCIATED WITH INDUSTRIAL ACTIVITY (MSGP)
AUTHORIZATION TO DISCHARGE UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of the Clean Water Act (CWA), as amended (33
U.S.C. 1251 et seq.), operators of stormwater discharges associated with industrial activity
located in an area identified in Appendix C where EPA is the permitting authority are authorized
to discharge to waters of the United States in accordance with the eligibility and Notice of Intent
(NOI) requirements, effluent limitations, inspection requirements, and other conditions set forth
in this permit. This permit is structured as follows:
general requirements that apply to all facilities are found in Parts 1 through 7;
industry sector-specific requirements are found in Part 8; and
specific requirements that apply in individual States and Indian Country Lands are
found in Part 9.
The Appendices (A through K) contain additional permit conditions that apply to all
operators covered under this permit.
This permit becomes effective on September 29, 2008.
This permit and the authorization to discharge expire at midnight, September 29, 2013.
Robert W. Varney, Regional Administrator
EPA Region 1
Carl-Axel P. Soderberg, Division Director, Caribbean
Environmental Protection Division
EPA Region 2
Jon M. Capacasa, Director, Water Protection
Division
EPA Region 3
Timothy C. Henry, Acting Director, Water Division
EPA Region 5
Miguel I. Flores, Director, Water Quality Protection
Division
EPA Region 6
Alexis Strauss, Director, Water Division
EPA Region 9
Michael Gearheard, Director, Office of Water and
Watersheds
EPA Region 10
Stormwater Discharges Associated with Industrial Activity i
As modified effective May 27, 2009
General Permit
NPDES MULTI-SECTOR GENERAL PERMITS FOR STORMWATER
DISCHARGES ASSOCIATED WITH INDUSTRIAL ACTIVITY
TABLE OF CONTENTS
1. Coverage under this Permit. .............................................................................................1
1.1 Eligibility........................................................................................................................................................1
1.1.1 Facilities Covered.....................................................................................................................................1
1.1.2 Allowable Stormwater Discharges...........................................................................................................1
1.1.3 Allowable Non-Stormwater Discharges...................................................................................................2
1.1.4 Limitations on Coverage. .........................................................................................................................3
1.1.4.1 Discharges Mixed with Non-Stormwater. .......................................................................................3
1.1.4.2 Stormwater Discharges Associated with Construction Activity......................................................3
1.1.4.3 Discharges Currently or Previously Covered by Another Permit...................................................3
1.1.4.4 Stormwater Discharges Subject to Effluent Limitations Guidelines. .............................................3
1.1.4.5 Endangered and Threatened Species and Critical Habitat Protection. .........................................3
1.1.4.6 Historic Properties Preservation......................................................................................................5
1.1.4.7 New Discharges to Water Quality Impaired Waters. ......................................................................6
1.1.4.8 New Discharges to Waters Designated as Tier 3 for Antidegradation Purposes. ..........................7
1.2 Permit Compliance........................................................................................................................................7
1.3 Authorization under this Permit..................................................................................................................7
1.3.1 How to Obtain Authorization...................................................................................................................7
1.3.2 Continuation of this Permit. .....................................................................................................................9
1.4 Terminating Coverage. ...............................................................................................................................10
1.4.1 Submitting a Notice of Termination.......................................................................................................10
1.4.2 When to Submit a Notice of Termination. .............................................................................................10
1.5 Conditional Exclusion for No Exposure. ...................................................................................................11
1.6 Alternative Permits. ....................................................................................................................................11
1.6.1 EPA Requiring Coverage under an Alternative Permit..........................................................................11
1.6.2 Permittee Requesting Coverage under an Alternative Permit................................................................11
1.7 Severability. .................................................................................................................................................12
2. Control Measures and Effluent Limits. .........................................................................12
2.1 Control Measures. .......................................................................................................................................12
2.1.1 Control Measure Selection and Design Considerations .........................................................................12
2.1.2 Non-Numeric Technology-Based Effluent Limits (BPT/BAT/BCT). ...................................................13
2.1.2.1 Minimize Exposure. .......................................................................................................................13
2.1.2.2 Good Housekeeping. ......................................................................................................................13
2.1.2.3 Maintenance...................................................................................................................................14
2.1.2.4 Spill Prevention and Response Procedures...................................................................................14
2.1.2.5 Erosion and Sediment Controls. ....................................................................................................14
2.1.2.6 Management of Runoff..................................................................................................................15
2.1.2.7 Salt Storage Piles or Piles Containing Salt. ..................................................................................15
2.1.2.8 Sector Specific Non-Numeric Effluent Limits. .............................................................................15
2.1.2.9 Employee Training.........................................................................................................................15
2.1.2.10 Non-Stormwater Discharges..........................................................................................................15
2.1.2.11 Waste, Garbage and Floatable Debris...........................................................................................15
2.1.2.12 Dust Generation and Vehicle Tracking of Industrial Materials. .................................................16
2.1.3 Numeric Effluent Limitations Based on Effluent Limitations Guidelines .............................................16
2.2 Water Quality-Based Effluent Limitations. ..............................................................................................16
2.2.1 Water Quality Standards ........................................................................................................................16
2.2.2 Discharges to Water Quality Impaired Waters.......................................................................................17
2.2.2.1 Existing Discharge to an Impaired Water with an EPA Approved or Established TMDL. ........17
2.2.2.2 Existing Discharge to an Impaired Water without an EPA Approved or Established TMDL. ...17
2.2.2.3 New Discharge to an Impaired Water. ..........................................................................................17
2.2.3 Tier 2 Antidegradation Requirements for New or Increased Dischargers..............................................17
2.3 Requirements Relating to Endangered Species and Historic Properties................................................17
2.4 Requirements Relating to the National Environmental Policy Act (NEPA) Review.............................18
Stormwater Discharges Associated With Industrial Activity ii
General Permit
3. Corrective Actions ...........................................................................................................18
3.1 Conditions Requiring Review and Revision to Eliminate Problem ........................................................18
3.2 Conditions Requiring Review to Determine if Modifications Are Necessary ........................................18
3.3 Corrective Action Deadlines.......................................................................................................................18
3.4 Corrective Action Report ...........................................................................................................................19
3.5 Effect of Corrective Action.........................................................................................................................19
3.6 Substantially Identical Outfalls..................................................................................................................20
4. Inspections ........................................................................................................................20
4.1 Routine Facility Inspections. ......................................................................................................................20
4.1.1 Routine Facility Inspection Procedures..................................................................................................20
4.1.2 Routine Facility Inspection Documentation...........................................................................................20
4.1.3 Exceptions to Routine Facility Inspections. ...........................................................................................21
4.2 Quarterly Visual Assessment of Stormwater Discharges. .......................................................................21
4.2.1 Quarterly Visual Assessment Procedures...............................................................................................21
4.2.2 Quarterly Visual Assessment Documentation........................................................................................22
4.2.3 Exceptions to Quarterly Visual Assessments. ........................................................................................22
4.3 Comprehensive Site Inspections.................................................................................................................24
4.3.1 Comprehensive Site Inspection Procedures. ..........................................................................................24
4.3.2 Comprehensive Site Inspection Documentation. ...................................................................................25
5. Stormwater Pollution Prevention Plan (SWPPP).........................................................25
5.1 Contents of Your SWPPP...........................................................................................................................26
5.1.1 Stormwater Pollution Prevention Team. ................................................................................................26
5.1.2 Site Description......................................................................................................................................26
5.1.3 Summary of Potential Pollutant Sources...............................................................................................27
5.1.3.1 Activities in the area.......................................................................................................................27
5.1.3.2 Pollutants........................................................................................................................................28
5.1.3.3 Spills and Leaks. ............................................................................................................................28
5.1.3.4 Non-Stormwater Discharges..........................................................................................................28
5.1.3.5 Salt Storage. ...................................................................................................................................28
5.1.3.6 Sampling Data................................................................................................................................28
5.1.4 Description of Control Measures. ..........................................................................................................28
5.1.4.1 Control Measures to Meet Technology-Based and Water Quality-Based Effluent Limits..........28
5.1.5 Schedules and Procedures ......................................................................................................................29
5.1.5.1 Pertaining to Control Measures Used to Comply with the Effluent Limits in Part 2. .................29
5.1.5.2 Pertaining to Monitoring and Inspection......................................................................................29
5.1.6 Documentation to Support Eligibility Considerations Under Other Federal Laws. ...............................31
5.1.6.1 Documentation Regarding Endangered Species...........................................................................31
5.1.6.2 Documentation Regarding Historic Properties.............................................................................31
5.1.6.3 Documentation Regarding NEPA Review.....................................................................................31
5.1.7 Signature Requirements. ........................................................................................................................31
5.2 Required SWPPP Modifications................................................................................................................31
5.3 SWPPP Availability. ...................................................................................................................................31
5.4 Additional Documentation Requirements.................................................................................................32
6. Monitoring........................................................................................................................33
6.1 Monitoring Procedures ...............................................................................................................................33
6.1.1 Monitored Outfalls. ................................................................................................................................33
6.1.2 Commingled Discharges. .......................................................................................................................33
6.1.3 Measurable Storm Events.......................................................................................................................33
6.1.4 Sample Type. .........................................................................................................................................34
6.1.5 Adverse Weather Conditions. ................................................................................................................34
6.1.6 Climates with Irregular Stormwater Runoff...........................................................................................34
6.1.7 Monitoring Periods.................................................................................................................................34
6.1.8 Monitoring for Allowable Non-Stormwater Discharges........................................................................35
6.2 Required Monitoring. .................................................................................................................................35
6.2.1 Benchmark Monitoring. .........................................................................................................................35
Stormwater Discharges Associated With Industrial Activity iii
General Permit
6.2.1.1 Applicability of Benchmark Monitoring. ......................................................................................35
6.2.1.2 Benchmark Monitoring Schedule. ................................................................................................36
6.2.1.3 Exception for Inactive and Unstaffed Sites...................................................................................37
6.2.2 Effluent Limitations Monitoring. ...........................................................................................................38
6.2.2.1 Monitoring Based on Effluent Limitations Guidelines.................................................................38
6.2.2.2 Substantially Identical Outfalls. ....................................................................................................38
6.2.3 State or Tribal Provisions Monitoring....................................................................................................38
6.2.3.1 Sectors Required to Conduct State or Tribal Monitoring. ............................................................38
6.2.3.2 State or Tribal Monitoring Schedule.............................................................................................38
6.2.4 Discharges to Impaired Waters Monitoring. ..........................................................................................39
6.2.4.1 Permittees Required to Monitor Discharges to Impaired Waters.................................................39
6.2.4.2 Impaired Waters Monitoring Schedule. ........................................................................................39
6.2.5 Additional Monitoring Required by EPA. .............................................................................................40
6.3 Follow-up Actions if Discharge Exceeds Numeric Effluent Limit...........................................................40
6.3.1 Submit an Exceedance Report................................................................................................................40
6.3.2 Continue to Monitor...............................................................................................................................40
7. Reporting and Recordkeeping........................................................................................41
7.1 Reporting Monitoring Data to EPA...........................................................................................................41
7.2 Annual Report .............................................................................................................................................41
7.3 Exceedance Report for Numeric Effluent Limits .....................................................................................41
7.4 Additional Reporting. .................................................................................................................................42
7.5 Recordkeeping. ............................................................................................................................................43
7.6 Addresses for Reports.................................................................................................................................43
7.6.1 EPA Addresses.......................................................................................................................................43
7.6.2 Regional Addresses................................................................................................................................44
7.6.3 State and Tribal Addresses.....................................................................................................................46
8. Sector Specific Requirements .........................................................................................47
8A. Sector A: Timber Products ............................................................................................................................47
8B. Sector B: Paper and Allied Products .............................................................................................................50
8C. Sector C: Chemicals and Allied Products Manufacturing.............................................................................51
8D. Sector D: Asphalt Paving and Roofing Materials and Lubricant Manufacturing..........................................54
8E. Sector E: Glass, Clay, Cement, Concrete, and Gypsum Products .................................................................56
8F. Sector F: Primary Metals...............................................................................................................................58
8G. Sector G: Metal Mining (Ore Mining and Dressing).....................................................................................60
8H. Sector H: Coal Mines and Coal Mining-Related Facilities ...........................................................................71
8I. Sector I: Oil and Gas Extraction and Refining..............................................................................................77
8J. Sector J: Mineral Mining and Dressing.........................................................................................................79
8K. Sector K: Hazardous Waste Treatment, Storage, or Disposal Facilities........................................................87
8L. Sector L: Landfills, Land Application Sites, and Open Dumps ....................................................................91
8M. Sector M: Automobile Salvage Yards...........................................................................................................95
8N. Sector N: Scrap Recycling Facilities.............................................................................................................97
8O. Sector O: Steam Electric Generating Facilities ...........................................................................................103
8P. Sector P: Land Transportation and Warehousing........................................................................................107
8Q. Sector Q: Water Transportation...................................................................................................................110
8R. Sector R: Ship and Boat Building and Repairing Yards..............................................................................113
8S. Sector S: Air Transportation Facilities ........................................................................................................116
8T. Sector T: Treatment Works .........................................................................................................................121
8U. Sector U: Food and Kindred Products.........................................................................................................123
8V. Sector V: Textile Mills, Apparel, and Other Fabric Product Manufacturing; Leather and Leather
Products.......................................................................................................................................................125
8W. Sector W: Furniture and Fixtures ................................................................................................................127
8X. Sector X: Printing and Publishing ...............................................................................................................128
8Y. Sector Y: Rubber, Miscellaneous Plastic Products, and Miscellaneous Manufacturing Industries.............130
8Z. Sector Z: Leather Tanning and Finishing....................................................................................................132
Stormwater Discharges Associated With Industrial Activity iv
General Permit
Stormwater Discharges Associated With Industrial Activity v
8AA. Sector AA: Fabricated Metal Products........................................................................................................134
8AB. Sector AB: Transportation Equipment, Industrial or Commercial Machinery............................................137
8AC. Sector AC: Electronic, Electrical, Photographic, and Optical Goods..........................................................138
8AD. Sector AD: Non-Classified Facilities ..........................................................................................................139
9. State/Tribal Specific Requirements..............................................................................140
Appendices
Appendix A Definitions and Acronyms ...................................................................................................................A-1
Appendix B Standard Permit Conditions .................................................................................................................B-1
Appendix C Areas Covered......................................................................................................................................C-1
Appendix D Activities Covered................................................................................................................................D-1
Appendix E Procedures relating to Endangered Species.......................................................................................... E-1
Appendix F National Historic Preservation Act Procedures.................................................................................... F-1
Appendix G Notice of Intent ....................................................................................................................................G-1
Appendix H Notice of Termination..........................................................................................................................H-1
Appendix I Comprehensive Site Inspection and Reporting Form............................................................................ I-1
Appendix J Calculating Hardness in Receiving Waters for Hardness Dependent Metals........................................ J-1
Appendix K No Exposure Certification....................................................................................................................K-1
General Permit
1. Coverage under this Permit.
1.1 Eligibility.
1.1.1 Facilities Covered.
To be eligible to discharge under this permit, you must (1) have a stormwater discharge
associated with industrial activity from your primary industrial activity, as defined in Appendix
A, provided your primary industrial activity is included in Appendix D, or (2) be notified by
EPA that you are eligible for coverage under Sector AD of this permit.
1.1.2 Allowable Stormwater Discharges.
Unless otherwise made ineligible under Part 1.1.4, the following discharges are eligible
for coverage under this permit:
1.1.2.1 Stormwater discharges associated with industrial activity for any primary industrial
activities and co-located industrial activities, as defined in Appendix A;
1.1.2.2 Discharges designated by EPA as needing a stormwater permit as provided in Sector
AD;
1.1.2.3 Discharges that are not otherwise required to obtain NPDES permit authorization but
are commingled with discharges that are authorized under this permit;
1.1.2.4 Discharges subject to any of the national stormwater-specific effluent limitations
guidelines listed in Table 1-1; and
Table 1-1. Stormwater-specific Effluent Limitations Guidelines
Regulated Discharge
40 CFR
Section
MSGP
Sector
New Source
Performance
Standard (NSPS)
New
Source
Date
Discharges resulting from spray
down or intentional wetting of
logs at wet deck storage areas
Part 429,
Subpart I
A Yes 1/26/81
Runoff from phosphate fertilizer
manufacturing facilities that
comes into contact with any raw
materials, finished product, by-
products or waste products (SIC
2874)
Part 418,
Subpart A
C Yes 4/8/74
Runoff from asphalt emulsion
facilities
Part 443,
Subpart A
D Yes 7/28/75
Runoff from material storage
piles at cement manufacturing
facilities
Part 411,
Subpart C
E Yes 2/20/74
Stormwater Discharges Associated With Industrial Activity 1
General Permit
Stormwater Discharges Associated With Industrial Activity 2
Mine dewatering discharges at
crushed stone, construction sand
and gravel, or industrial sand
mining facilities
Part 436,
Subparts
B, C, and
D
J No N/A
Runoff from hazardous waste and
non-hazardous waste landfills
Part 445,
Subparts
A and B
K, L Yes 2/2/00
Runoff from coal storage piles at
steam electric generating facilities
Part 423 O Yes 11/19/82
(10/8/74)
1
1.1.2.5 Discharges subject to any New Source Performance Standards (NSPS) identified in
Table 1-1 (i.e., where facilities were constructed after the promulgation of that industry’s NSPS),
provided that you obtain and retain the following EPA documentation with your SWPPP, prior to
submitting your NOI, and that you comply with any limits pursuant to Part 2.4:
Determination of “No Significant Impact” under the National Environmental Policy Act
(NEPA); or
A completed Environmental Impact Statement in accordance with an environmental
review conducted by EPA pursuant to 40 CFR 6.102(a)(6)
2
.
1.1.3 Allowable Non-Stormwater Discharges.
The following are the non-stormwater discharges authorized under this permit, provided
the non-stormwater component of your discharge is in compliance with Part 2.1.2.10:
Discharges from fire-fighting activities;
Fire hydrant flushings;
Potable water, including water line flushings;
Uncontaminated condensate from air conditioners, coolers, and other compressors
and from the outside storage of refrigerated gases or liquids;
Irrigation drainage;
Landscape watering provided all pesticides, herbicides, and fertilizer have been
applied in accordance with the approved labeling;
Pavement wash waters where no detergents are used and no spills or leaks of toxic
or hazardous materials have occurred (unless all spilled material has been
removed);
Routine external building washdown that does not use detergents;
Uncontaminated ground water or spring water;
1
NSPS promulgated in 1974 were not removed via the 1982 regulation; therefore wastewaters generated by Part
423-applicable sources that were New Sources under the 1974 regulations are subject to the 1974 NSPS.
2
Note that if you have previously completed an Environmental Impact Statement or obtained a “No Significant
Impact” statement for discharges subject to NSPS, you have met your obligation under this provision and you only
need to retain this documentation for your files.
General Permit
Foundation or footing drains where flows are not contaminated with process
materials; and
Incidental windblown mist from cooling towers that collects on rooftops or
adjacent portions of your facility, but not intentional discharges from the cooling
tower (e.g., “piped” cooling tower blowdown or drains).
1.1.4 Limitations on Coverage.
1.1.4.1 Discharges Mixed with Non-Stormwater. Stormwater discharges that are mixed with
non-stormwater, other than those non-stormwater discharges listed in Part 1.1.3, are not
eligible for coverage under this permit.
1.1.4.2 Stormwater Discharges Associated with Construction Activity. Stormwater discharges
associated with construction activity disturbing one acre or more are not eligible for
coverage under this permit, unless in conjunction with mining activities or certain oil and
gas extraction activities as specified in Sectors G, H, I, and J of this permit.
1.1.4.3 Discharges Currently or Previously Covered by Another Permit. Unless you received
written notification from EPA specifically allowing these discharges to be covered under
this permit, you are not eligible for coverage under this permit for any of the following:
Stormwater discharges associated with industrial activity that are currently
covered under an individual NPDES permit or an alternative NPDES general
permit;
Discharges covered within five years prior to the effective date of this permit by
an individual permit or alternative general permit where that permit established
site-specific numeric water quality-based limitations developed for the stormwater
component of the discharge; or
Discharges from facilities where any NPDES permit has been or is in the process
of being denied, terminated, or revoked by EPA (this does not apply to the routine
reissuance of permits every five years).
1.1.4.4 Stormwater Discharges Subject to Effluent Limitations Guidelines. For discharges
subject to stormwater effluent limitation guidelines under 40 CFR, Subchapter N, only
those stormwater discharges identified in Table 1-1 are eligible for coverage under this
permit.
1.1.4.5 Endangered and Threatened Species and Critical Habitat Protection. Coverage under
this permit is available only if your stormwater discharges, allowable non-stormwater
discharges, and stormwater discharge-related activities will not adversely affect any
species that are federally-listed as endangered or threatened (“listed”) under the
Endangered Species Act (ESA) and will not result in the adverse modification or
destruction of habitat that is federally-designated as “critical habitat” under the ESA.
You must meet one of the criteria below, following the procedures in Appendix E:
Stormwater Discharges Associated With Industrial Activity 3
General Permit
Criterion A. No federally-listed threatened or endangered species or their designated critical
habitat are likely to occur in the “action area” as defined in Appendix A; or
Criterion B. Consultation between a Federal agency and the U.S. Fish and Wildlife Service
and/or the National Marine Fisheries Service (together, the “Services”) under
section 7 of the ESA has been concluded. Consultations can be either formal or
informal, and would have occurred only as a result of a separate federal action
(e.g., during application for an individual wastewater discharge permit or the
issuance of a wetlands dredge and fill permit).
The consultation must have addressed the effects of your facility’s stormwater
discharges, allowable non-stormwater discharges, and stormwater discharge-related
activities on federally-listed threatened or endangered species and federally-designated
critical habitat, and must have resulted in either:
i. a biological opinion finding no jeopardy to federally-listed species or
destruction/adverse modification of federally-designated critical habitat; or
ii. written concurrence from the Service(s) with a finding that the facility’s
stormwater discharges associated with industrial activity, discharge-related
activities and allowable non-stormwater discharges are not likely to adversely
affect federally-listed species or federally-designated critical habitat; or
Criterion C. Your industrial activities are authorized through the issuance of a permit under
section 10 of the ESA, and authorization addresses the effects of the stormwater
discharges associated with industrial activity, discharge-related activities, and
allowable non-stormwater discharges on federally-listed species and federally-
designated critical habitat; or
Criterion D. Coordination between you and the U.S. Fish and Wildlife Service and/or the
National Marine Fisheries Service has been concluded. The coordination must
have addressed the effects of the facility’s stormwater discharges associated with
industrial activity, discharge-related activities, and allowable non-stormwater
discharges on federally-listed threatened or endangered species and federally-
designated critical habitat. The result of the coordination must be a written
statement from the Service concluding that authorizing your stormwater
discharges, discharge-related activities, and allowable non-stormwater discharges
is consistent with the determination that the issuance of the MSGP is not likely to
adversely affect federally-listed threatened or endangered species and federally-
designated critical habitat. Any conditions or prerequisites deemed necessary to
achieve consistency with the “not likely to adversely effect” determination
become eligibility conditions for MSGP coverage, and permit requirements under
Part 2.3; or
Criterion E. Authorizing your stormwater discharges associated with industrial activity,
discharge-related activities, and allowable non-stormwater discharges is
Stormwater Discharges Associated With Industrial Activity 4
General Permit
consistent with the determination that the issuance of the MSGP is not likely to
adversely affect any federally-listed endangered and threatened (“listed”) species
or designated critical habitat (“critical habitat”). To support your determination
that you meet Criterion E, you must provide supporting documentation for your
determination.
i. If you are an existing discharger, you must provide the following information
with your completed Notice of Intent (NOI) form: (1) a list of the federally-listed
threatened or endangered species or their designated critical habitat that are likely
to occur in the “action area”; (2) a list of the pollutant parameters for which you
have ever exceeded an applicable benchmark or effluent limitations guideline, or
for which your discharge has ever been found to cause or contribute to an
exceedance of an applicable water quality standard, or to violate State or Tribal
water quality requirements (Part 9); and (3) your rationale supporting your
determination that you meet Criterion E, including appropriate measures to be
undertaken to avoid or eliminate the likelihood of adverse effects.
ii. If you are a new discharger, you must provide the following information with
your completed NOI form: (1) a list of the federally-listed threatened or
endangered species or their designated critical habitat that are likely to occur in
the “action area”; (2) a list of the potential pollutants in your discharge; and (3)
your rationale supporting your determination that you meet Criterion E, including
appropriate measures to be undertaken to avoid or eliminate the likelihood of
adverse effects; or
Criterion F. The facility’s stormwater discharges associated with industrial activity, discharge-
related activities, and allowable non-stormwater discharges were already
addressed in another operator’s valid certification of eligibility that included these
discharges and activities and there is no reason to believe that federally-listed
species or federally-designated critical habitat not considered in the prior
certification may be present or located in the “action area”. To certify eligibility
under this criterion there must be no lapse of coverage in the other operator’s
certification. By certifying eligibility under this criterion, you agree to comply
with any measures or controls upon which the other operator's certification was
based. You must comply with any applicable terms, conditions, or other
requirements developed in the process of meeting the eligibility requirements of
the criteria in this section to remain eligible for coverage under this permit. If
your certification is based on another operator’s certification under Criterion E,
that certification is valid only if you have documentation showing that the other
operator had certified under Criterion E, and you provide EPA with the
supporting information required of existing dischargers in Criterion E (above,
under subparagraph (i)) in your NOI form.
1.1.4.6 Historic Properties Preservation. Coverage under this permit is available only if your
stormwater discharges, allowable non-stormwater discharges, and stormwater discharge-
Stormwater Discharges Associated With Industrial Activity 5
General Permit
related activities meet one of the eligibility criteria below, following the procedures in
Appendix F:
Criterion A. Your stormwater discharges and allowable non-stormwater discharges do not
have the potential to have an effect on historic properties and you are not
constructing or installing new stormwater control measures on your site that cause
subsurface disturbance; or
Criterion B. Your discharge-related activities (i.e., construction and/or installation of
stormwater control measures that involve subsurface disturbance) will not affect
historic properties; or
Criterion C. Your stormwater discharges, allowable non-stormwater discharges, and
discharge-related activities have the potential to have an effect on historic
properties, and you have consulted with the State Historic Preservation Officer
(SHPO), Tribal Historic Preservation Officer (THPO), or other tribal
representative regarding measures to mitigate or prevent any adverse effects on
historic properties, and you have either (1) obtained and are in compliance with a
written agreement that outlines all such measures, or (2) been unable to reach
agreement on such measures; or
Criterion D. You have contacted the State Historic Preservation Officer, Tribal Historic
Preservation Officer, or other tribal representative and EPA in writing informing
them that you have the potential to have an effect on historic properties and you
did not receive a response from the SHPO, THPO, or tribal representative within
30 days of receiving your letter.
If you have been unable to reach agreement with a SHPO, THPO, or other tribal
representative regarding appropriate measures to mitigate or prevent adverse effects, EPA may
notify you of additional measures you must implement to be eligible for coverage under this
permit.
1.1.4.7 New Discharges to Water Quality Impaired Waters. If you are a new discharger you are
not eligible for coverage under this permit to discharge to an “impaired water”, as defined
in Appendix A unless you:
a. prevent all exposure to stormwater of the pollutant(s) for which the waterbody is
impaired, and retain documentation of procedures taken to prevent exposure
onsite with your SWPPP; or
b. document that the pollutant(s) for which the waterbody is impaired is not present
at your site, and retain documentation of this finding with your SWPPP; or
c. in advance of submitting your NOI, provide to the appropriate EPA Regional
Office data to support a showing that the discharge is not expected to cause or
contribute to an exceedance of a water quality standard, and retain such data
Stormwater Discharges Associated With Industrial Activity 6
General Permit
onsite with your SWPPP. To do this, you must provide data and other technical
information to the Regional Office sufficient to demonstrate:
i. For discharges to waters without an EPA approved or established TMDL, that
the discharge of the pollutant for which the water is impaired will meet in-
stream water quality criteria at the point of discharge to the waterbody; or
ii. For discharges to waters with an EPA approved or established TMDL, that
there are sufficient remaining wasteload allocations in an EPA approved or
established TMDL to allow your discharge and that existing dischargers to the
waterbody are subject to compliance schedules designed to bring the
waterbody into attainment with water quality standards.
You are eligible under Part 1.1.4.7.c if you receive an affirmative determination
from the Regional Office that your discharge will not contribute to the existing
impairment, in which case you must maintain such determination onsite with your
SWPPP, or if the Regional Office fails to respond within 30 days of submission of
data to the Regional Office.
1.1.4.8 New Discharges to Waters Designated as Tier 3 for Antidegradation Purposes. If you
are a new discharger, you are not eligible for coverage under this permit for discharges to
waters designated by a State or Tribe as Tier 3 (outstanding natural resource waters) for
antidegradation purposes under 40 CFR 131.13(a)(3) (see list of Tier 3 waters on EPA’s
website at http://www.epa.gov/npdes/stormwater/msgp).
1.2 Permit Compliance.
Any noncompliance with any of the requirements of this permit constitutes a violation of
the Clean Water Act. As detailed in Part 3 (Corrective Actions) of this permit, failure to take any
required corrective actions constitute an independent, additional violation of this permit and the
Clean Water Act. As such, any actions and time periods specified for remedying noncompliance
do not absolve parties of the initial underlying noncompliance. However, where corrective
action is triggered by an event that does not itself constitute permit noncompliance, such as an
exceedance of an applicable benchmark, there is no permit violation provided you take the
required corrective action within the relevant deadlines established in Part 3.3.
1.3 Authorization under this Permit.
1.3.1 How to Obtain Authorization.
To obtain authorization under this permit, you must:
Be located in a State, territory, or Indian Country, or be a Federal Facility
identified in Appendix C where EPA is the permitting authority;
Meet the Part 1.1 eligibility requirements;
Stormwater Discharges Associated With Industrial Activity 7
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Select, design, install, and implement control measures in accordance with Part
2.1 to meet numeric and non-numeric effluent limits;
Submit a complete and accurate Notice of Intent (NOI) either using EPA’s
electronic Notice of Intent (eNOI) system (accessible at
www.epa.gov/npdes/eNOI) or using a paper form (included in Appendix G of this
permit) and then submitting that paper form to the address listed in Part 7.6.1; and
Develop a SWPPP according to the requirements in Part 5 of this permit.
EPA will post on the Internet, at www.epa.gov/npdes/noisearch, all NOIs received. Late
NOIs will be accepted but authorization to discharge will not be retroactive.
Timeframes for discharge authorization are contained in Table 1-2. Some authorization
dates in Table 1-2 are dependent on you posting a copy of your SWPPP on the Internet. Posting
requires that (1) your NOI identifies the Uniform Resource Locator (URL) that provides direct
access to your SWPPP, (2) you post a complete copy of your SWPPP at that URL, and (3) the
SWPPP is available from that URL at least for the period starting the day you submit your NOI
until you are authorized to discharge. You are not required to post any confidential business
information (CBI) at this URL, but you must clearly identify those portions of the SWPPP that
are being withheld from public access as a result of your determination of CBI.
Stormwater Discharges Associated With Industrial Activity 8
General Permit
Table 1-2. NOI Submittal Deadlines/Discharge Authorization Dates
Category NOI Submission
Deadline
Discharge Authorization Date
1
Existing Dischargersin
operation as of October 30, 2005
and authorized for coverage
under MSGP 2000.
No later than January 5,
2009.
30 days after EPA posts your NOI.
Your authorization under the MSGP
2000 is automatically continued until
you have been granted coverage under
this permit or an alternative permit, or
coverage is otherwise terminated.
New Dischargers or New
Sources - have commenced
discharging between October 30,
2005 and January 5, 2009.
As soon as possible but
no later than January 5,
2009.
30 days after EPA posts your NOI.
New Dischargers or New
Sources - commence discharging
after January 5, 2009.
A minimum of 60 days
prior to commencing
discharge, or a minimum
of 30 days if your
SWPPP is posted on the
Internet during this
period and the Internet
address (i.e., URL) to
your SWPPP is provided
on the NOI form.
If you post your SWPPP on the Internet,
30 days after EPA posts your NOI.
Otherwise, 60 days after EPA posts your
NOI.
New Owner/Operator of
Existing Discharger - transfer of
ownership and/or operation of a
facility whose discharge is
authorized under this permit
A minimum of 30 days
prior to date that the
transfer will take place to
the new owner/operator.
30 days after EPA posts your NOI.
Other Eligible Dischargers - in
operation prior to October 30,
2005, but not covered under the
MSGP 2000 or another NPDES
permit.
Immediately, to
minimize the time
discharges from the
facility will continue to
be unauthorized.
If you post your SWPPP on the Internet,
30 days after EPA posts your NOI.
Otherwise, 60 days after EPA posts your
NOI.
1
Based on a review of your NOI or other information, EPA may delay your authorization for
further review, notify you that additional effluent limitations are necessary, or may deny
coverage under this permit and require submission of an application for an individual NPDES
permit, as detailed in Part 1.6. In these instances, EPA will notify you in writing of the delay, of
the need for additional effluent limits, or of the request for submission of an individual NPDES
permit application.
1.3.2 Continuation of this Permit.
If this permit is not reissued or replaced prior to the expiration date, it will be
administratively continued in accordance with 40 CFR 122.6 and remain in force and effect. If
Stormwater Discharges Associated With Industrial Activity 9
General Permit
you were authorized to discharge under this permit prior to the expiration date, any discharges
authorized under this permit will automatically remain covered by this permit until the earliest
of:
Your authorization for coverage under a reissued permit or a replacement of this
permit following your timely and appropriate submittal of a complete NOI
requesting authorization to discharge under the new permit and compliance with
the requirements of the new permit; or
Your submittal of a Notice of Termination; or
Issuance or denial of an individual permit for the facility’s discharges; or
A formal permit decision by EPA not to reissue this general permit, at which time
EPA will identify a reasonable time period for covered dischargers to seek
coverage under an alternative general permit or an individual permit. Coverage
under this permit will cease at the end of this time period.
1.4 Terminating Coverage.
1.4.1 Submitting a Notice of Termination.
To terminate permit coverage, you must submit a complete and accurate Notice of
Termination either electronically (strongly encouraged) at www.epa.gov/npdes/eNOI or using
the paper Notice of Termination form included in Appendix H of this permit, to the address
listed in Part 7.6.1. Your authorization to discharge under this permit terminates at midnight of
the day that a complete Notice of Termination is processed and posted on EPA’s website
(www.epa.gov/npdes/noisearch). If you submit a Notice of Termination without meeting one or
more of the conditions identified in Part 1.4.2, then your Notice of Termination is not valid. You
are responsible for meeting the terms of this permit until your authorization is terminated.
1.4.2 When to Submit a Notice of Termination.
You must submit a Notice of Termination within 30 days after one or more of the
following conditions have been met:
A new owner or operator has taken over responsibility for the facility; or
You have ceased operations at the facility, there are not or no longer will be
discharges of stormwater associated with industrial activity from the facility, and
you have already implemented necessary sediment and erosion controls as
required by Part 2.1.2.5;
You are a Sector G, H, or J facility and you have met the applicable termination
requirements; or
You have obtained coverage under an individual or alternative general permit for
all discharges required to be covered by an NPDES permit, unless EPA has
required that you obtain such coverage under authority of Part 1.6.1, in which
case coverage under this permit will terminate automatically.
Stormwater Discharges Associated With Industrial Activity 10
General Permit
1.5 Conditional Exclusion for No Exposure.
If you are covered by this permit, and become eligible for a no exposure exclusion from
permitting under 40 CFR 122.26(g), you may file a No Exposure Certification. You are no
longer required to have a permit upon submission of a complete and accurate no exposure
certification to EPA. If you are no longer required to have permit coverage because of a no
exposure exclusion and have submitted a No Exposure Certification form to EPA, you are not
required to submit a Notice of Termination. You must submit a No Exposure Certification to
EPA once every five years. File your No Exposure Certification using the eNOI system at
www.epa.gov/npdes/eNOI.
1.6 Alternative Permits.
1.6.1 EPA Requiring Coverage under an Alternative Permit.
EPA may require you to apply for and/or obtain authorization to discharge under either
an individual NPDES permit or an alternative NPDES general permit in accordance with 40 CFR
122.64 and 124.5. Any interested person may petition EPA to take action under this paragraph. If
EPA requires you to apply for an individual NPDES permit, EPA will notify you in writing that a
permit application is required. This notification will include a brief statement of the reasons for
this decision and will provide application information. In addition, if you are an existing
discharger authorized to discharge under this permit, the notice will set a deadline to file the
permit application, and will include a statement that on the effective date of the individual
NPDES permit, or the alternative general permit as it applies to you, coverage under this general
permit will terminate. EPA may grant additional time to submit the application if you request it.
If you are covered under this permit and fail to submit an individual NPDES permit application
as required by EPA, then the applicability of this permit to you is terminated at the end of the day
specified by EPA as the deadline for application submittal. EPA may take appropriate
enforcement action for any unpermitted discharge.
1.6.2 Permittee Requesting Coverage under an Alternative Permit.
You may request to be excluded from coverage under this general permit by applying for
an individual permit. In such a case, you must submit an individual permit application in
accordance with the requirements of 40 CFR 122.26(c)(1)(ii), with reasons supporting the
request, to EPA at the applicable EPA Regional Office listed in Part 7.6.2 of this permit. The
request may be granted by issuance of an individual permit or authorization of coverage under an
alternative general permit if your reasons are adequate to support the request.
When an individual NPDES permit is issued to you or you are authorized to discharge
under an alternative NPDES general permit, your authorization to discharge under this permit is
terminated on the effective date of the individual permit or the date of authorization of coverage
under the alternative general permit.
Stormwater Discharges Associated With Industrial Activity 11
General Permit
1.7 Severability.
Invalidation of a portion of this permit does not necessarily render the whole permit
invalid. EPA’s intent is that the permit is to remain in effect to the extent possible; in the event
that any part of this permit is invalidated, EPA will advise the regulated community as to the
effect of such invalidation.
2. Control Measures and Effluent Limits.
In the technology-based limits included in Part 2.1 and in Part 8, the term “minimize”
means reduce and/or eliminate to the extent achievable using control measures (including best
management practices) that are technologically available and economically practicable and
achievable in light of best industry practice.
2.1 Control Measures.
You must select, design, install, and implement control measures (including best
management practices) to address the selection and design considerations in Part 2.1.1, meet the
non-numeric effluent limits in Part 2.1.2, and meet limits contained in applicable effluent
limitations guidelines in Part 2.1.3. The selection, design, installation, and implementation of
these control measures must be in accordance with good engineering practices and
manufacturer’s specifications. Note that you may deviate from such manufacturer’s
specifications where you provide justification for such deviation and include documentation of
your rationale in the part of your SWPPP that describes your control measures, consistent with
Part 5.1.4. If you find that your control measures are not achieving their intended effect of
minimizing pollutant discharges, you must modify these control measures as expeditiously as
practicable. Regulated stormwater discharges from your facility include stormwater run-on that
commingles with stormwater discharges associated with industrial activity at your facility.
2.1.1 Control Measure Selection and Design Considerations
You must consider the following when selecting and designing control measures:
preventing stormwater from coming into contact with polluting materials is
generally more effective, and less costly, than trying to remove pollutants from
stormwater;
using control measures in combination is more effective than using control
measures in isolation for minimizing pollutants in your stormwater discharge;
assessing the type and quantity of pollutants, including their potential to impact
receiving water quality, is critical to designing effective control measures that will
achieve the limits in this permit;
minimizing impervious areas at your facility and infiltrating runoff onsite
(including bioretention cells, green roofs, and pervious pavement, among other
approaches) can reduce runoff and improve groundwater recharge and stream
base flows in local streams, although care must be taken to avoid ground water
contamination;
Stormwater Discharges Associated With Industrial Activity 12
General Permit
attenuating flow using open vegetated swales and natural depressions can reduce
in-stream impacts of erosive flows;
conserving and/or restoring of riparian buffers will help protect streams from
stormwater runoff and improve water quality; and
using treatment interceptors (e.g., swirl separators and sand filters) may be
appropriate in some instances to minimize the discharge of pollutants.
2.1.2 Non-Numeric Technology-Based Effluent Limits (BPT/BAT/BCT).
2.1.2.1 Minimize Exposure. You must minimize the exposure of manufacturing, processing, and
material storage areas (including loading and unloading, storage, disposal, cleaning,
maintenance, and fueling operations) to rain, snow, snowmelt, and runoff by either locating these
industrial materials and activities inside or protecting them with storm resistant coverings
(although significant enlargement of impervious surface area is not recommended). In
minimizing exposure, you should pay particular attention to the following:
- use grading, berming, or curbing to prevent runoff of contaminated flows and divert
run-on away from these areas;
- locate materials, equipment, and activities so that leaks are contained in existing
containment and diversion systems (confine the storage of leaky or leak-prone
vehicles and equipment awaiting maintenance to protected areas);
- clean up spills and leaks promptly using dry methods (e.g., absorbents) to prevent the
discharge of pollutants;
- use drip pans and absorbents under or around leaky vehicles and equipment or store
indoors where feasible;
- use spill/overflow protection equipment;
- drain fluids from equipment and vehicles prior to on-site storage or disposal;
- perform all cleaning operations indoors, under cover, or in bermed areas that prevent
runoff and run-on and also that capture any overspray; and
- ensure that all washwater drains to a proper collection system (i.e., not the stormwater
drainage system).
The discharge of vehicle and equipment washwater, including tank cleaning operations,
is not authorized by this permit. These wastewaters must be covered under a separate
NPDES permit, discharged to a sanitary sewer in accordance with applicable industrial
pretreatment requirements, or disposed of otherwise in accordance with applicable law.
Note: Industrial materials do not need to be enclosed or covered if stormwater runoff
from affected areas will not be discharged to receiving waters or if discharges are
authorized under another NPDES permit.
2.1.2.2 Good Housekeeping. You must keep clean all exposed areas that are potential sources of
pollutants, using such measures as sweeping at regular intervals, keeping materials
orderly and labeled, and storing materials in appropriate containers.
Stormwater Discharges Associated With Industrial Activity 13
General Permit
2.1.2.3 Maintenance. You must regularly inspect, test, maintain, and repair all industrial
equipment and systems to avoid situations that may result in leaks, spills, and other
releases of pollutants in stormwater discharged to receiving waters. You must maintain
all control measures that are used to achieve the effluent limits required by this permit in
effective operating condition. Nonstructural control measures must also be diligently
maintained (e.g., spill response supplies available, personnel appropriately trained). If
you find that your control measures need to be replaced or repaired, you must make the
necessary repairs or modifications as expeditiously as practicable.
2.1.2.4 Spill Prevention and Response Procedures. You must minimize the potential for leaks,
spills and other releases that may be exposed to stormwater and develop plans for
effective response to such spills if or when they occur. At a minimum, you must
implement:
Procedures for plainly labeling containers (e.g., “Used Oil,” “Spent Solvents,”
“Fertilizers and Pesticides,” etc.) that could be susceptible to spillage or leakage
to encourage proper handling and facilitate rapid response if spills or leaks occur;
Preventative measures such as barriers between material storage and traffic areas,
secondary containment provisions, and procedures for material storage and
handling;
Procedures for expeditiously stopping, containing, and cleaning up leaks, spills,
and other releases. Employees who may cause, detect, or respond to a spill or
leak must be trained in these procedures and have necessary spill response
equipment available. If possible, one of these individuals should be a member of
your stormwater pollution prevention team (see Part 5.1.1); and
Procedures for notification of appropriate facility personnel, emergency response
agencies, and regulatory agencies. Where a leak, spill, or other release containing
a hazardous substance or oil in an amount equal to or in excess of a reportable
quantity established under either 40 CFR Part 110, 40 CFR Part 117, or 40 CFR
Part 302, occurs during a 24-hour period, you must notify the National Response
Center (NRC) at (800) 424-8802 or, in the Washington, DC, metropolitan area,
call (202) 267-2675 in accordance with the requirements of 40 CFR Part 110, 40
CFR Part 117, and 40 CFR Part 302 as soon as you have knowledge of the
discharge. State or local requirements may necessitate reporting spills or
discharges to local emergency response, public health, or drinking water supply
agencies. Contact information must be in locations that are readily accessible and
available.
2.1.2.5 Erosion and Sediment Controls. You must stabilize exposed areas and contain runoff
using structural and/or non-structural control measures to minimize onsite erosion and
sedimentation, and the resulting discharge of pollutants. Among other actions you must
take to meet this limit, you must place flow velocity dissipation devices at discharge
locations and within outfall channels where necessary to reduce erosion and/or settle out
pollutants. In selecting, designing, installing, and implementing appropriate control
measures, you are encouraged to consult with EPA’s internet-based resources relating to
BMPs for erosion and sedimentation, including the sector-specific Industrial Stormwater
Stormwater Discharges Associated With Industrial Activity 14
General Permit
Fact Sheet Series, (www.epa.gov/npdes/stormwater/msgp), National Menu of Stormwater
BMPs (www.epa.gov/npdes/stormwater/menuofbmps), and National Management
Measures to Control Nonpoint Source Pollution from Urban Areas
(www.epa.gov/owow/nps/urbanmm/index.html
), and any similar State or Tribal
publications.
2.1.2.6 Management of Runoff. You must divert, infiltrate, reuse, contain, or otherwise reduce
stormwater runoff, to minimize pollutants in your discharges. In selecting, designing,
installing, and implementing appropriate control measures, you are encouraged to consult
with EPA’s internet-based resources relating to runoff management, including the sector-
specific Industrial Stormwater Fact Sheet Series,
(www.epa.gov/npdes/stormwater/msgp
), National Menu of Stormwater BMPs
(www.epa.gov/npdes/stormwater/menuofbmps), and National Management Measures to
Control Nonpoint Source Pollution from Urban Areas
(www.epa.gov/owow/nps/urbanmm/index.html), and any similar State or Tribal
publications.
2.1.2.7 Salt Storage Piles or Piles Containing Salt. You must enclose or cover storage piles of
salt, or piles containing salt, used for deicing or other commercial or industrial purposes,
including maintenance of paved surfaces. You must implement appropriate measures
(e.g., good housekeeping, diversions, containment) to minimize exposure resulting from
adding to or removing materials from the pile. Piles do not need to be enclosed or
covered if stormwater runoff from the piles is not discharged or if discharges from the
piles are authorized under another NPDES permit.
2.1.2.8 Sector Specific Non-Numeric Effluent Limits. You must achieve any additional non-
numeric limits stipulated in the relevant sector-specific section(s) of Part 8.
2.1.2.9 Employee Training. You must train all employees who work in areas where industrial
materials or activities are exposed to stormwater, or who are responsible for
implementing activities necessary to meet the conditions of this permit (e.g., inspectors,
maintenance personnel), including all members of your Pollution Prevention Team.
Training must cover both the specific control measures used to achieve the effluent limits
in this Part, and monitoring, inspection, planning, reporting, and documentation
requirements in other parts of this permit. EPA recommends training be conducted at
least annually (or more often if employee turnover is high).
2.1.2.10 Non-Stormwater Discharges. You must eliminate non-stormwater discharges not
authorized by an NPDES permit. See Part 1.2.3 for a list of non-stormwater discharges
authorized by this permit.
2.1.2.11 Waste, Garbage and Floatable Debris. You must ensure that waste, garbage, and
floatable debris are not discharged to receiving waters by keeping exposed areas free of
such materials or by intercepting them before they are discharged.
Stormwater Discharges Associated With Industrial Activity 15
General Permit
2.1.2.12 Dust Generation and Vehicle Tracking of Industrial Materials. You must minimize
generation of dust and off-site tracking of raw, final, or waste materials.
2.1.3 Numeric Effluent Limitations Based on Effluent Limitations Guidelines
If you are in an industrial category subject to one of the effluent limitations guidelines
identified in Table 6-1 (see Part 6.2.2.1), you must meet the effluent limits referenced in Table 2-
1 below:
Table 2-1. Applicable Effluent Limitations Guidelines
Regulated Activity 40 CFR Part/Subpart Effluent Limit
Discharges resulting from spray down or
intentional wetting of logs at wet deck
storage areas
Part 429, Subpart I See Part 8.A.7
Runoff from phosphate fertilizer
manufacturing facilities that comes into
contact with any raw materials, finished
product, by-products or waste products
(SIC 2874)
Part 418, Subpart A See Part 8.C.4
Runoff from asphalt emulsion facilities Part 443, Subpart A See Part 8.D.4
Runoff from material storage piles at
cement manufacturing facilities
Part 411, Subpart C See Part 8.E.5
Mine dewatering discharges at crushed
stone, construction sand and gravel, or
industrial sand mining facilities
Part 436, Subparts B, C,
or D
See Part 8.J.9
Runoff from hazardous waste landfills Part 445, Subpart A See Part 8.K.6
Runoff from non-hazardous waste
landfills
Part 445, Subpart B See Part 8.L.10
Runoff from coal storage piles at steam
electric generating facilities
Part 423 See Part 8.O.8
2.2 Water Quality-Based Effluent Limitations.
2.2.1 Water Quality Standards
Your discharge must be controlled as necessary to meet applicable water quality
standards.
EPA expects that compliance with the other conditions in this permit will control
discharges as necessary to meet applicable water quality standards. If at any time you become
aware, or EPA determines, that your discharge causes or contributes to an exceedance of
applicable water quality standards, you must take corrective action as required in Part 3.1,
document the corrective actions as required in Parts 3.4 and 5.4, and report the corrective actions
to EPA as required in Part 7.2.
Stormwater Discharges Associated With Industrial Activity 16
General Permit
Additionally, EPA may impose additional water quality-based limitations on a site-
specific basis, or require you to obtain coverage under an individual permit, if information in
your NOI, required reports, or from other sources indicates that your discharges are not
controlled as necessary to meet applicable water quality standards.
2.2.2 Discharges to Water Quality Impaired Waters.
2.2.2.1 Existing Discharge to an Impaired Water with an EPA Approved or Established
TMDL. If you discharge to an impaired water with an EPA approved or established
TMDL, EPA will inform you if any additional limits or controls are necessary for your
discharge to be consistent with the assumptions of any available wasteload allocation in
the TMDL, or if coverage under an individual permit is necessary in accordance with Part
1.6.1.
2.2.2.2 Existing Discharge to an Impaired Water without an EPA Approved or Established
TMDL. If you discharge to an impaired water without an EPA approved or established
TMDL, you are required to comply with Part 2.2.1 and the monitoring requirement of
Part 6.2.4. Note that this provision also applies to situations where EPA determines that
your discharge is not controlled as necessary to meet water quality standards in a
downstream water segment, even if your discharge is to a receiving water that is not
specifically identified on a Section 303(d) list.
2.2.2.3 New Discharge to an Impaired Water. If your authorization to discharge under this
permit relied on Part 1.1.4.7 for a new discharge to an impaired water, you must
implement and maintain any control measures or conditions on your site that enabled you
to become eligible under Part 1.1.4.7, and modify such measures or conditions as
necessary pursuant to any Part 3 corrective actions. You are also required to comply with
Part 2.2.1 and the monitoring requirements of Parts 6.2.4.
2.2.3 Tier 2 Antidegradation Requirements for New or Increased Dischargers
If you are a new discharger, or an existing discharger required to notify EPA of an
increased discharge consistent with Part 7.4 (i.e., a “planned changes” report), and you discharge
directly to waters designated by a State or Tribe as Tier 2 or Tier 2.5 for antidegradation
purposes under 40 CFR 131.12(a) (see list of Tier 2 and 2.5 waters on EPA’s website at
http://www.epa.gov/npdes/stormwater/msgp
), EPA may notify you that additional analyses,
control measures, or other permit conditions are necessary to comply with the applicable
antidegradation requirements, or notify you that an individual permit application is necessary in
accordance with Part 1.6.1.
2.3 Requirements Relating to Endangered Species and Historic Properties
If your eligibility under either Part 1.1.4.5 or Part 1.1.4.6 was made possible through
your, or another operator’s, agreement to include certain measures or prerequisite actions, or
implement certain terms and conditions, you must comply with all such agreed-upon
requirements to maintain eligibility under the MSGP.
Stormwater Discharges Associated With Industrial Activity 17
General Permit
2.4 Requirements Relating to the National Environmental Policy Act (NEPA) Review
If your eligibility under Part 1.1.2.5 was made possible through your agreement to
implement any mitigation measures as a result of the NEPA review process, you must comply
with all such agreed-upon measures to maintain eligibility under the MSGP.
3. Corrective Actions
3.1 Conditions Requiring Review and Revision to Eliminate Problem
If any of the following conditions occur, you must review and revise the selection,
design, installation, and implementation of your control measures to ensure that the condition is
eliminated and will not be repeated in the future:
an unauthorized release or discharge (e.g., spill, leak, or discharge of non-stormwater not
authorized by this or another NPDES permit) occurs at your facility;
a discharge violates a numeric effluent limit;
you become aware, or EPA determines, that your control measures are not stringent
enough for the discharge to meet applicable water quality standards;
an inspection or evaluation of your facility by an EPA official, or local, State, or Tribal
entity, determines that modifications to the control measures are necessary to meet the
non-numeric effluent limits in this permit; or
you find in your routine facility inspection, quarterly visual assessment, or
comprehensive site inspection that your control measures are not being properly operated
and maintained.
3.2 Conditions Requiring Review to Determine if Modifications Are Necessary
If any of the following conditions occur, you must review the selection, design, installation,
and implementation of your control measures to determine if modifications are necessary to meet
the effluent limits in this permit:
construction or a change in design, operation, or maintenance at your facility
significantly changes the nature of pollutants discharged in stormwater from your
facility, or significantly increases the quantity of pollutants discharged; or
the average of 4 quarterly sampling results exceeds an applicable benchmark. If less
than 4 benchmark samples have been taken, but the results are such that an
exceedence of the 4 quarter average is mathematically certain (i.e., if the sum of
quarterly sample results to date is more than 4 times the benchmark level) this is
considered a benchmark exceedence, triggering this review.
3.3 Corrective Action Deadlines
You must document your discovery of any of the conditions listed in Parts 3.1 and 3.2
within 24 hours of making such discovery. Subsequently, within 14 days of such discovery, you
Stormwater Discharges Associated With Industrial Activity 18
General Permit
must document any corrective action(s) to be taken to eliminate or further investigate the
deficiency, or if no corrective action is needed, the basis for that determination. Specific
documentation required within 24 hours and 14 days is detailed in Part 3.4. If you determine that
changes are necessary following your review, any modifications to your control measures must
be made before the next storm event if possible, or as soon as practicable following that storm
event. These time intervals are not grace periods, but are schedules considered reasonable for
documenting your findings and for making repairs and improvements. They are included in this
permit to ensure that the conditions prompting the need for these repairs and improvements are
not allowed to persist indefinitely.
3.4 Corrective Action Report
Within 24 hours of discovery of any condition listed in Parts 3.1 and 3.2, you must
document the following information (i.e., questions 3-5 of the Corrective Actions section in the
Annual Reporting Form, provided in Appendix I):
Identification of the condition triggering the need for corrective action review;
Description of the problem identified; and
Date the problem was identified.
Within 14 days of discovery of any condition listed in Parts 3.1 and 3.2, you must
document the following information (i.e., questions 7-11 of the Corrective Actions section in the
Annual Reporting Form, provided in Appendix I):
Summary of corrective action taken or to be taken (or, for triggering events identified in
Part 3.2 where you determine that corrective action is not necessary, the basis for this
determination);
Notice of whether SWPPP modifications are required as a result of this discovery or
corrective action;
Date corrective action initiated; and
Date corrective action completed or expected to be completed.
You must submit this documentation in an annual report as required in Part 7.2 and retain
a copy onsite with your SWPPP as required in Part 5.4.
3.5 Effect of Corrective Action
If the event triggering the review is a permit violation (e.g., non-compliance with an
effluent limit), correcting it does not remove the original violation. Additionally, failing to take
corrective action in accordance with this section is an additional permit violation. EPA will
consider the appropriateness and promptness of corrective action in determining enforcement
responses to permit violations.
Stormwater Discharges Associated With Industrial Activity 19
General Permit
3.6 Substantially Identical Outfalls
If the event triggering corrective action is linked to an outfall that represents other
substantially identical outfalls, your review must assess the need for corrective action for each
outfall represented by the outfall that triggered the review. Any necessary changes to control
measures that affect these other outfalls must also be made before the next storm event if
possible, or as soon as practicable following that storm event.
4. Inspections
You must conduct the inspections in Parts 4.1, 4.2, and 4.3 at your facility.
4.1 Routine Facility Inspections.
4.1.1 Routine Facility Inspection Procedures.
Conduct routine facility inspections of all areas of the facility where industrial materials
or activities are exposed to stormwater, and of all stormwater control measures used to comply
with the effluent limits contained in this permit. Routine facility inspections must be conducted
at least quarterly (i.e., once each calendar quarter) although in many instances, more frequent
inspection (e.g., monthly) may be appropriate for some types of equipment, processes, and
control measures or areas of the facility with significant activities and materials exposed to
stormwater. Perform these inspections during periods when the facility is in operation. You
must specify the relevant inspection schedules in your SWPPP document as required in Part
5.1.5. These routine inspections must be performed by qualified personnel (for definition see
Appendix A) with at least one member of your stormwater pollution prevention team
participating. At least once each calendar year, the routine facility inspection must be conducted
during a period when a stormwater discharge is occurring.
4.1.2 Routine Facility Inspection Documentation.
You must document the findings of each routine facility inspection performed and
maintain this documentation onsite with your SWPPP as required in Part 5.4. You are not
required to submit your routine facility inspection findings to EPA, unless specifically requested
to do so. At a minimum, your documentation of each routine facility inspection must include:
The inspection date and time;
The name(s) and signature(s) of the inspector(s);
Weather information and a description of any discharges occurring at the time of
the inspection;
Any previously unidentified discharges of pollutants from the site;
Any control measures needing maintenance or repairs;
Any failed control measures that need replacement;
Any incidents of noncompliance observed; and
Any additional control measures needed to comply with the permit requirements.
Stormwater Discharges Associated With Industrial Activity 20
General Permit
Any corrective action required as a result of a routine facility inspection must be
performed consistent with Part 3 of this permit.
4.1.3 Exceptions to Routine Facility Inspections.
Inactive and Unstaffed Sites: The requirement to conduct routine facility inspections on
a quarterly basis does not apply at a facility that is inactive and unstaffed, as long as there
are no industrial materials or activities exposed to stormwater. Such a facility is only
required to conduct an annual comprehensive site inspection in accordance with the
requirements of Part 4.3. To invoke this exception, you must maintain a statement in
your SWPPP pursuant to Part 5.1.5.2 indicating that the site is inactive and unstaffed, and
that there are no industrial materials or activities exposed to precipitation, in accordance
with the substantive requirements in 40 CFR 122.26(g)(4)(iii). The statement must be
signed and certified in accordance with Appendix B, Subsection 11. If circumstances
change and industrial materials or activities become exposed to stormwater or your
facility becomes active and/or staffed, this exception no longer applies and you must
immediately resume quarterly facility inspections. If you are not qualified for this
exception at the time you are authorized under this permit, but during the permit term you
become qualified because your facility is inactive and unstaffed, and there are no
industrial materials or activities that are exposed to stormwater, then you must include the
same signed and certified statement as above and retain it with your records pursuant to
Part 5.4.
Inactive and unstaffed facilities covered under Sectors G (Metal Mining), H (Coal Mines
and Coal Mining-Related Facilities), and J (Non-Metallic Mineral Mining and Dressing),
are not required to meet the “no industrial materials or activities exposed to stormwater”
standard to be eligible for this exception from routine inspections, consistent with the
requirements established in Parts 8.G.8.4, 8.H.8.1, and 8.J.8.1.
4.2 Quarterly Visual Assessment of Stormwater Discharges.
4.2.1 Quarterly Visual Assessment Procedures.
Once each quarter for the entire permit term, you must collect a stormwater sample from
each outfall (except as noted in Part 4.2.3) and conduct a visual assessment of each of these
samples. These samples are not required to be collected consistent with 40 CFR Part 136
procedures but should be collected in such a manner that the samples are representative of the
stormwater discharge.
The visual assessment must be made:
Of a sample in a clean, clear glass, or plastic container, and examined in a well-lit
area;
On samples collected within the first 30 minutes of an actual discharge from a
storm event. If it is not possible to collect the sample within the first 30 minutes
of discharge, the sample must be collected as soon as practicable after the first 30
Stormwater Discharges Associated With Industrial Activity 21
General Permit
minutes and you must document why it was not possible to take samples within
the first 30 minutes. In the case of snowmelt, samples must be taken during a
period with a measurable discharge from your site; and
For storm events, on discharges that occur at least 72 hours (3 days) from the
previous discharge. The 72-hour (3-day) storm interval does not apply if you
document that less than a 72-hour (3-day) interval is representative for local storm
events during the sampling period.
You must visually inspect the sample for the following water quality characteristics:
- Color;
- Odor;
- Clarity;
- Floating solids;
- Settled solids;
- Suspended solids;
- Foam;
- Oil sheen; and
- Other obvious indicators of stormwater pollution.
4.2.2 Quarterly Visual Assessment Documentation.
You must document the results of your visual assessments and maintain this
documentation onsite with your SWPPP as required in Part 5.4. You are not required to submit
your visual assessment findings to EPA, unless specifically requested to do so. At a minimum,
your documentation of the visual assessment must include:
Sample location(s)
Sample collection date and time, and visual assessment date and time for each
sample;
Personnel collecting the sample and performing visual assessment, and their
signatures;
Nature of the discharge (i.e., runoff or snowmelt);
Results of observations of the stormwater discharge;
Probable sources of any observed stormwater contamination,
If applicable, why it was not possible to take samples within the first 30 minutes.
Any corrective action required as a result of a quarterly visual assessment must be
performed consistent with Part 3 of this permit.
4.2.3 Exceptions to Quarterly Visual Assessments.
Adverse Weather Conditions
: When adverse weather conditions prevent the collection of
samples during the quarter, you must take a substitute sample during the next qualifying
storm event. Documentation of the rationale for no visual assessment for the quarter must
be included with your SWPPP records as described in Part 5.4. Adverse conditions are
Stormwater Discharges Associated With Industrial Activity 22
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those that are dangerous or create inaccessibility for personnel, such as local flooding,
high winds, or electrical storms, or situations that otherwise make sampling impractical,
such as drought or extended frozen conditions.
Climates with Irregular Stormwater Runoff: If your facility is located in an area where
limited rainfall occurs during many parts of the year (e.g., arid or semi-arid climate) or in
an area where freezing conditions exist that prevent runoff from occurring for extended
periods, then your samples for the quarterly visual assessments may be distributed during
seasons when precipitation runoff occurs.
Areas Subject to Snow: In areas subject to snow, at least one quarterly visual assessment
must capture snowmelt discharge, as described in Part 6.1.3, taking into account the
exception described above for climates with irregular stormwater runoff.
Inactive and unstaffed sites: The requirement for a quarterly visual assessment does not
apply at a facility that is inactive and unstaffed, as long as there are no industrial
materials or activities exposed to stormwater. To invoke this exception, you must
maintain a statement in your SWPPP as required in Part 5.1.5.2 indicating that the site is
inactive and unstaffed, and that there are no industrial materials or activities exposed to
precipitation, in accordance with the substantive requirements in 40 CFR
122.26(g)(4)(iii). The statement must be signed and certified in accordance with
Appendix B, Subsection 11. If circumstances change and industrial materials or activities
become exposed to stormwater or your facility becomes active and/or staffed, this
exception no longer applies and you must immediately resume quarterly visual
assessments. If you are not qualified for this exception at the time you are authorized
under this permit, but during the permit term you become qualified because your facility
is inactive and unstaffed, and there are no industrial materials or activities that are
exposed to stormwater, then you must include the same signed and certified statement as
above and retain it with your records pursuant to Part 5.4.
Inactive and unstaffed facilities covered under Sectors G (Metal Mining), H (Coal Mines
and Coal Mining-Related Facilities), and J (Non-Metallic Mineral Mining and Dressing),
are not required to meet the “no industrial materials or activities exposed to stormwater”
standard to be eligible for this exception from quarterly visual assessment, consistent
with the requirements established in Parts 8.G.8.4, 8.H.8.1, and 8.J.8.1.
Substantially identical outfalls: If your facility has two or more outfalls that you believe
discharge substantially identical effluents, as documented in Part 5.1.5.2, you may
conduct quarterly visual assessments of the discharge at just one of the outfalls and report
that the results also apply to the substantially identical outfall(s) provided that you
perform visual assessments on a rotating basis of each substantially identical outfall
throughout the period of your coverage under this permit.
If stormwater contamination is identified through visual assessment performed at a
substantially identical outfall, you must assess and modify your control measures as
appropriate for each outfall represented by the monitored outfall.
Stormwater Discharges Associated With Industrial Activity 23
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4.3 Comprehensive Site Inspections.
4.3.1 Comprehensive Site Inspection Procedures.
You must conduct annual comprehensive site inspections while you are covered under
this permit. Annual, as defined in this Part, means once during each of the following inspection
periods beginning with the period you are authorized to discharge under this permit:
Year 1: September 29, 2008 – September 29, 2009
Year 2: September 29, 2009 – September 29, 2010
Year 3: September 29, 2010 – September 29, 2011
Year 4: September 29, 2011 – September 29, 2012
Year 5: September 29, 2012 – September 29, 2013
You are waived from having to perform a comprehensive site inspection for an inspection
period, as defined above, if you obtain authorization to discharge less than three months before
the end of that inspection period.
Should your coverage be administratively continued after the expiration date of this
permit, you must continue to perform these inspections annually until you are no longer covered.
Comprehensive site inspections must be conducted by qualified personnel with at least
one member of your stormwater pollution prevention team participating in the comprehensive
site inspections.
Your comprehensive site inspections must cover all areas of the facility affected by the
requirements in this permit, including the areas identified in the SWPPP as potential pollutant
sources (see Part 5.1.3) where industrial materials or activities are exposed to stormwater, any
areas where control measures are used to comply with the effluent limits in Part 2, and areas
where spills and leaks have occurred in the past 3 years. The inspections must also include a
review of monitoring data collected in accordance with Part 6.2. Inspectors must consider the
results of the past year’s visual and analytical monitoring when planning and conducting
inspections. Inspectors must examine the following:
Industrial materials, residue, or trash that may have or could come into contact with
stormwater;
Leaks or spills from industrial equipment, drums, tanks, and other containers;
Offsite tracking of industrial or waste materials, or sediment where vehicles enter or exit
the site;
Tracking or blowing of raw, final, or waste materials from areas of no exposure to
exposed areas; and
Control measures needing replacement, maintenance, or repair.
Stormwater Discharges Associated With Industrial Activity 24
General Permit
Stormwater control measures required by this permit must be observed to ensure that they
are functioning correctly. If discharge locations are inaccessible, nearby downstream locations
must be inspected.
Your annual comprehensive site inspection may also be used as one of the routine
inspections, as long as all components of both types of inspections are included.
4.3.2 Comprehensive Site Inspection Documentation.
You must document the findings of each comprehensive site inspection and maintain this
documentation onsite with your SWPPP as required in Part 5.4. In addition, you must submit
this documentation in an annual report as required in Part 7.2. At a minimum, your
documentation of the comprehensive site inspection must include (see the Annual Reporting
Form included as Appendix I):
The date of the inspection;
The name(s) and title(s) of the personnel making the inspection;
Findings from the examination of areas of your facility identified in Part 4.3.1;
All observations relating to the implementation of your control measures
including:
previously unidentified discharges from the site,
previously unidentified pollutants in existing discharges,
evidence of, or the potential for, pollutants entering the drainage system;
evidence of pollutants discharging to receiving waters at all facility outfall(s),
and the condition of and around the outfall, including flow dissipation
measures to prevent scouring, and
additional control measures needed to address any conditions requiring
corrective action identified during the inspection.
Any required revisions to the SWPPP resulting from the inspection;
Any incidents of noncompliance observed or a certification stating the facility is
in compliance with this permit (if there is no noncompliance); and
A statement, signed and certified in accordance with Appendix B, Subsection 11
of the permit.
Any corrective action required as a result of the comprehensive site inspection must be
performed consistent with Part 3 of this permit.
5. Stormwater Pollution Prevention Plan (SWPPP).
You must prepare a SWPPP for your facility before
submitting your Notice of Intent
(NOI) for permit coverage. If you prepared a SWPPP for coverage under a previous NPDES
permit, you must review and update the SWPPP to implement all provisions of this permit prior
to submitting your NOI. The SWPPP does not contain effluent limitations; the limitations are
contained in Part 2 of the permit, and for some sectors, Parts 8 and 9 of the permit. The SWPPP
is intended to document the selection, design, and installation of control measures. As distinct
from the SWPPP, the additional documentation requirements (see Part 5.4) are intended to
Stormwater Discharges Associated With Industrial Activity 25
General Permit
document the implementation (including inspection, maintenance, monitoring, and corrective
action) of the permit requirements.
5.1 Contents of Your SWPPP.
For coverage under this permit, your SWPPP must contain all of the following elements:
Stormwater pollution prevention team (see Part 5.1.1);
Site description (see Part 5.1.2);
Summary of potential pollutant sources (see Part 5.1.3);
Description of control measures (see Part 5.1.4);
Schedules and procedures (see Part 5.1.5);
Documentation to support eligibility considerations under other federal laws (see
Part 5.1.6); and
Signature requirements (see Part 5.1.7).
Where your SWPPP refers to procedures in other facility documents, such as a Spill
Prevention, Control and Countermeasure (SPCC) Plan or an Environmental Management System
(EMS) developed for a National Environmental Performance Track facility, copies of the
relevant portions of those documents must be kept with your SWPPP.
5.1.1 Stormwater Pollution Prevention Team.
You must identify the staff members (by name or title) that comprise the facility’s
stormwater pollution prevention team as well as their individual responsibilities. Your
stormwater pollution prevention team is responsible for assisting the facility manager in
developing and revising the facility’s SWPPP as well as maintaining control measures and taking
corrective actions where required. Each member of the stormwater pollution prevention team
must have ready access to either an electronic or paper copy of applicable portions of this permit
and your SWPPP.
5.1.2 Site Description.
Your SWPPP must include the following:
Activities at the Facility. Provide a description of the nature of the industrial
activities at your facility.
General location map. Provide a general location map (e.g., U.S. Geological
Survey (USGS) quadrangle map) with enough detail to identify the location of
your facility and all receiving waters for your stormwater discharges.
Site map. Provide a map showing:
the size of the property in acres;
the location and extent of significant structures and impervious surfaces;
directions of stormwater flow (use arrows);
locations of all existing structural control measures;
Stormwater Discharges Associated With Industrial Activity 26
General Permit
locations of all receiving waters in the immediate vicinity of your facility,
indicating if any of the waters are impaired and, if so, whether the waters have
TMDLs established for them;
locations of all stormwater conveyances including ditches, pipes, and swales;
locations of potential pollutant sources identified under Part 5.1.3.2;
locations where significant spills or leaks identified under Part 5.1.3.3 have
occurred;
locations of all stormwater monitoring points;
locations of stormwater inlets and outfalls, with a unique identification code
for each outfall (e.g., Outfall No. 1, No. 2, etc), indicating if you are treating
one or more outfalls as “substantially identical” under Parts 4.2.3, 5.1.5.2, and
6.1.1, and an approximate outline of the areas draining to each outfall;
municipal separate storm sewer systems, where your stormwater discharges to
them;
locations and descriptions of all non-stormwater discharges identified under
Part 2.1.2.10;
locations of the following activities where such activities are exposed to
precipitation:
o fueling stations;
o vehicle and equipment maintenance and/or cleaning areas;
o loading/unloading areas;
o locations used for the treatment, storage, or disposal of wastes;
o liquid storage tanks;
o processing and storage areas;
o
immediate access roads and rail lines used or traveled by carriers of raw
materials, manufactured products, waste material, or by-products used or
created by the facility;
o transfer areas for substances in bulk; and
o machinery; and
locations and sources of run-on to your site from adjacent property that
contains significant quantities of pollutants.
5.1.3 Summary of Potential Pollutant Sources.
You must document areas at your facility where industrial materials or activities are
exposed to stormwater and from which allowable non-stormwater discharges are released.
Industrial materials or activities include, but are not limited to: material handling equipment or
activities; industrial machinery; raw materials; industrial production and processes; and
intermediate products, by-products, final products, and waste products. Material handling
activities include, but are not limited to: the storage, loading and unloading, transportation,
disposal, or conveyance of any raw material, intermediate product, final product or waste
product. For each area identified, the description must include:
5.1.3.1 Activities in the area. A list of the industrial activities exposed to stormwater (e.g.,
material storage; equipment fueling, maintenance, and cleaning; cutting steel beams).
Stormwater Discharges Associated With Industrial Activity 27
General Permit
5.1.3.2 Pollutants. A list of the pollutant(s) or pollutant constituents (e.g., crankcase oil, zinc,
sulfuric acid, and cleaning solvents) associated with each identified activity. The
pollutant list must include all significant materials that have been handled, treated, stored,
or disposed, and that have been exposed to stormwater in the 3 years prior to the date you
prepare or amend your SWPPP.
5.1.3.3 Spills and Leaks. You must document where potential spills and leaks could occur that
could contribute pollutants to stormwater discharges, and the corresponding outfall(s)
that would be affected by such spills and leaks. You must document all significant spills
and leaks of oil or toxic or hazardous pollutants that actually occurred at exposed areas,
or that drained to a stormwater conveyance, in the 3 years prior to the date you prepare or
amend your SWPPP.
Note: Significant spills and leaks include, but are not limited to, releases of oil or
hazardous substances in excess of quantities that are reportable under CWA Section 311
(see 40 CFR 110.6 and 40 CFR 117.21) or Section 102 of the Comprehensive
Environmental Response, Compensation and Liability Act (CERCLA), 42 USC §9602.
This permit does not relieve you of the reporting requirements of 40 CFR 110, 40 CFR
117, and 40 CFR 302 relating to spills or other releases of oils or hazardous substances.
5.1.3.4 Non-Stormwater Discharges. You must document that you have evaluated for the
presence of non-stormwater discharges and that all unauthorized discharges have been
eliminated. Documentation of your evaluation must include:
The date of any evaluation;
A description of the evaluation criteria used;
A list of the outfalls or onsite drainage points that were directly observed during
the evaluation;
The different types of non-stormwater discharge(s) and source locations; and
The action(s) taken, such as a list of control measures used to eliminate
unauthorized discharge(s), if any were identified. For example, a floor drain was
sealed, a sink drain was re-routed to sanitary, or an NPDES permit application
was submitted for an unauthorized cooling water discharge.
5.1.3.5 Salt Storage. You must document the location of any storage piles containing salt used
for deicing or other commercial or industrial purposes.
5.1.3.6 Sampling Data. You must summarize all stormwater discharge sampling data collected
at your facility during the previous permit term.
5.1.4 Description of Control Measures.
5.1.4.1 Control Measures to Meet Technology-Based and Water Quality-Based Effluent
Limits. You must document the location and type of control measures you have installed
and implemented at your site to achieve the non-numeric effluent limits in Part 2.1.2, and
where applicable in Part 8, the effluent limitations guidelines-based limits in Part 2.1.3,
Stormwater Discharges Associated With Industrial Activity 28
General Permit
the water quality-based effluent limits in Part 2.2, and any agreed-upon endangered
species or NEPA-related requirements in Parts 2.3 and 2.4, and describe how you
addressed the control measure selection and design considerations in Part 2.1.1. This
documentation must describe how the control measures at your site address both the
pollutant sources identified in Part 5.1.3, and any stormwater run-on that commingles
with any discharges covered under this permit.
5.1.5 Schedules and Procedures
5.1.5.1 Pertaining to Control Measures Used to Comply with the Effluent Limits in Part 2.
The following must be documented in your SWPPP:
Good Housekeeping (See Part 2.1.2.2) – A schedule for regular pickup and
disposal of waste materials, along with routine inspections for leaks and
conditions of drums, tanks and containers;
Maintenance (See Part 2.1.2.3) – Preventative maintenance procedures, including
regular inspections, testing, maintenance, and repair of all industrial equipment
and systems, and control measures, to avoid situations that may result in leaks,
spills, and other releases, and any back-up practices in place should a runoff event
occur while a control measure is off-line;
Spill Prevention and Response Procedures (See Part 2.1.2.4) – Procedures for
preventing and responding to spills and leaks. You may reference the existence of
other plans for Spill Prevention Control and Countermeasure (SPCC) developed
for the facility under Section 311 of the CWA or BMP programs otherwise
required by an NPDES permit for the facility, provided that you keep a copy of
that other plan onsite and make it available for review consistent with Part 5.3;
and
Employee Training (Part 2.1.2.9) – A schedule for all types of necessary training.
5.1.5.2 Pertaining to Monitoring and Inspection. You must document in your SWPPP your
procedures for conducting the five types of analytical monitoring specified by this permit,
where applicable to your facility, including:
Benchmark monitoring (see Part 6.2.1);
Effluent limitations guidelines monitoring (see Part 6.2.2);
State- or Tribal-specific monitoring (see Part 6.2.3);
Impaired waters monitoring (see Part 6.2.4); and
Other monitoring as required by EPA (see Part 6.2.5).
For each type of monitoring, your SWPPP must document:
Locations where samples are collected, including any determination that two or
more outfalls are substantially identical;
Parameters for sampling and the frequency of sampling for each parameter;
Schedules for monitoring at your facility, including schedule for alternate
monitoring periods for climates with irregular stormwater runoff (see Part 6.1.6);
Stormwater Discharges Associated With Industrial Activity 29
General Permit
Any numeric control values (benchmarks, effluent limitations guidelines, TMDL-
related requirements, or other requirements) applicable to discharges from each
outfall; and
Procedures (e.g., responsible staff, logistics, laboratory to be used, etc.) for
gathering storm event data, as specified in Part 6.1.
If you are invoking the exception for inactive and unstaffed sites for benchmark
monitoring, you must include in your SWPPP the information to support this claim as required
by Part 6.2.1.3.
You must document the following in your SWPPP if you plan to use the substantially
identical outfall exception for your quarterly visual assessment requirements in Part 4.2 or your
benchmark monitoring requirements in Part 6.2.1:
Location of each of the substantially identical outfalls;
Description of the general industrial activities conducted in the drainage area of
each outfall;
Description of the control measures implemented in the drainage area of each
outfall;
Description of the exposed materials located in the drainage area of each outfall
that are likely to be significant contributors of pollutants to stormwater
discharges;
An estimate of the runoff coefficient of the drainage areas (low = under 40%;
medium = 40 to 65%; high = above 65%); and
Why the outfalls are expected to discharge substantially identical effluents.
You must document in your SWPPP your procedures for performing, as appropriate, the
three types of inspections specified by this permit, including:
Routine facility inspections (see Part 4.1);
Quarterly visual assessment of stormwater discharges (see Part 4.2); and
Comprehensive site inspections (see Part 4.3).
For each type of inspection performed, your SWPPP must identify:
Person(s) or positions of person(s) responsible for inspection;
Schedules for conducting inspections, including tentative schedule for facilities in
climates with irregular stormwater runoff discharges (see Part 4.2.3); and
Specific items to be covered by the inspection, including schedules for specific
outfalls.
If you are invoking the exception for inactive and unstaffed sites relating to routine
facility inspections and quarterly visual assessments, you must include in your SWPPP the
information to support this claim as required by Parts 4.1.3 and 4.2.3.
Stormwater Discharges Associated With Industrial Activity 30
General Permit
5.1.6 Documentation to Support Eligibility Considerations Under Other Federal Laws.
5.1.6.1 Documentation Regarding Endangered Species. You must keep with your SWPPP the
documentation supporting your determination with regard to Part 1.1.4.5 (Endangered
and Threatened Species and Critical Habitat Protection).
5.1.6.2 Documentation Regarding Historic Properties. You must keep with your SWPPP the
documentation supporting your determination with regard to Part 1.1.4.6 (Historic
Properties Preservation).
5.1.6.3 Documentation Regarding NEPA Review. You must keep with your SWPPP the
documentation supporting your certification of eligibility under Part 1.1.2.5 (Discharges
Subject to Any New Source Performance Standards).
5.1.7 Signature Requirements.
You must sign and date your SWPPP in accordance with Appendix B, Subsection 11,
including the date of signature.
5.2 Required SWPPP Modifications.
You must modify your SWPPP whenever necessary to address any of the triggering
conditions for corrective action in Part 3.1 and to ensure that they do not reoccur, or to reflect
changes implemented when a review following the triggering conditions in Part 3.2 indicates that
changes to your control measures are necessary to meet the effluent limits in this permit.
Changes to your SWPPP document must be made in accordance with the corrective action
deadlines in Parts 3.3 and 3.4, and must be signed and dated in accordance with Appendix B,
Subsection 11.
5.3 SWPPP Availability.
You must retain a copy of the current SWPPP required by this permit at the facility, and
it must be immediately available to EPA; a State, Tribal, or local agency approving stormwater
management plans; the operator of an MS4 receiving discharges from the site; and
representatives of the U.S. Fish and Wildlife Service (USFWS) or the National Marine Fisheries
Service (NMFS) at the time of an onsite inspection or upon request. EPA may provide access to
portions of your SWPPP to a member of the public upon request. Confidential Business
Information (CBI) may be withheld from the public, but may not be withheld from those staff
cleared for CBI review within EPA, USFWS, or NMFS.
EPA encourages you to post your SWPPP online and provide the website address on your
NOI.
Stormwater Discharges Associated With Industrial Activity 31
General Permit
5.4 Additional Documentation Requirements.
You are required to keep the following inspection, monitoring, and certification records
with your SWPPP that together keep your records complete and up-to-date, and demonstrate
your full compliance with the conditions of this permit:
A copy of the NOI submitted to EPA along with any correspondence exchanged
between you and EPA specific to coverage under this permit;
A copy of the acknowledgment letter you receive from the NOI Processing Center
or eNOI system assigning your permit tracking number;
A copy of this permit (an electronic copy easily available to SWPPP personnel is
also acceptable);
Descriptions and dates of any incidences of significant spills, leaks, or other
releases that resulted in discharges of pollutants to waters of the U.S., through
stormwater or otherwise; the circumstances leading to the release and actions
taken in response to the release; and measures taken to prevent the recurrence of
such releases (see Part 2.1.2.4);
Records of employee training, including date training received (see Part 2.1.2.9);
Documentation of maintenance and repairs of control measures, including the
date(s) of regular maintenance, date(s) of discovery of areas in need of
repair/replacement, and for repairs, date(s) that the control measure(s) returned to
full function, and the justification for any extended maintenance/repair schedules
(see Part 2.1.2.3);
All inspection reports, including the Routine Facility Inspection Reports (see Part
4.1), the Quarterly Visual Assessment Reports (see Part 4.2), and the
Comprehensive Site Inspection Reports (see Part 4.3);
Description of any deviations from the schedule for visual assessments and/or
monitoring, and the reason for the deviations (e.g., adverse weather or it was
impracticable to collect samples within the first 30 minutes of a measurable storm
event) (see Parts 4.2.1, 6.1.4, and 6.2.1.2);
Description of any corrective action taken at your site, including triggering event
and dates when problems were discovered and modifications occurred;
Documentation of any benchmark exceedances and how they were responded to,
including either (1) corrective action taken, (2) a finding that the exceedence was
due to natural background pollutant levels, or (3) a finding that no further
pollutant reductions were technologically available and economically practicable
and achievable in light of best industry practice consistent with Part 6.2.1.2;
Documentation to support any determination that pollutants of concern are not
expected to be present above natural background levels if you discharge directly
to impaired waters, and that such pollutants were not detected in your discharge or
were solely attributable to natural background sources (see Part 6.2.4.2); and
Documentation to support your claim that your facility has changed its status from
active to inactive and unstaffed with respect to the requirements to conduct
routine facility inspections (see Part 4.1.3), quarterly visual assessments (see Part
4.2.3), and/or benchmark monitoring (see Part 6.2.1.3).
Stormwater Discharges Associated With Industrial Activity 32
General Permit
6. Monitoring.
You must collect and analyze stormwater samples and document monitoring activities
consistent with the procedures described in Part 6 and Appendix B, Subsections 10 – 12, and any
additional sector-specific or State/Tribal-specific requirements in Parts 8 and 9, respectively.
Refer to Part 7 for reporting and recordkeeping requirements.
6.1 Monitoring Procedures
6.1.1 Monitored Outfalls.
Applicable monitoring requirements apply to each outfall authorized by this permit,
except as otherwise exempt from monitoring as a “substantially identical outfall.” If your
facility has two or more outfalls that you believe discharge substantially identical effluents,
based on the similarities of the general industrial activities and control measures, exposed
materials that may significantly contribute pollutants to stormwater, and runoff coefficients of
their drainage areas, you may monitor the effluent of just one of the outfalls and report that the
results also apply to the substantially identical outfall(s). As required in Part 5.1.5.2, your
SWPPP must identify each outfall authorized by this permit and describe the rationale for any
substantially identical outfall determinations. The allowance for monitoring only one of the
substantially identical outfalls is not applicable to any outfalls with numeric effluent limitations.
You are required to monitor each outfall covered by a numeric effluent limit as identified in Part
6.2.2.
6.1.2 Commingled Discharges.
If discharges authorized by this permit commingle with discharges not authorized under
this permit, any required sampling of the authorized discharges must be performed at a point
before they mix with other waste streams, to the extent practicable.
6.1.3 Measurable Storm Events.
All required monitoring must be performed on a storm event that results in an actual
discharge from your site (“measurable storm event”) that follows the preceding measurable
storm event by at least 72 hours (3 days). The 72-hour (3-day) storm interval does not apply if
you are able to document that less than a 72-hour (3-day) interval is representative for local
storm events during the sampling period. In the case of snowmelt, the monitoring must be
performed at a time when a measurable discharge occurs at your site.
For each monitoring event, except snowmelt monitoring, you must identify the date and
duration (in hours) of the rainfall event, rainfall total (in inches) for that rainfall event, and time
(in days) since the previous measurable storm event. For snowmelt monitoring, you must
identify the date of the sampling event.
Stormwater Discharges Associated With Industrial Activity 33
General Permit
6.1.4 Sample Type.
You must take a minimum of one grab sample from a discharge resulting from a
measurable storm event as described in Part 6.1.3. Samples must be collected within the first 30
minutes of a measurable storm event. If it is not possible to collect the sample within the first 30
minutes of a measurable storm event, the sample must be collected as soon as practicable after
the first 30 minutes and documentation must be kept with the SWPPP explaining why it was not
possible to take samples within the first 30 minutes. In the case of snowmelt, samples must be
taken during a period with a measurable discharge.
6.1.5 Adverse Weather Conditions.
When adverse weather conditions as described in Part 4.2.3 prevent the collection of
samples according to the relevant monitoring schedule, you must take a substitute sample during
the next qualifying storm event. Adverse weather does not exempt you from having to file a
benchmark monitoring report in accordance with your sampling schedule. You must report any
failure to monitor as specified in Part 7.1 indicating the basis for not sampling during the usual
reporting period.
6.1.6 Climates with Irregular Stormwater Runoff.
If your facility is located in areas where limited rainfall occurs during parts of the year
(e.g., arid or semi-arid climates) or in areas where freezing conditions exist that prevent runoff
from occurring for extended periods, required monitoring events may be distributed during
seasons when precipitation occurs, or when snowmelt results in a measurable discharge from
your site. You must still collect the required number of samples.
6.1.7 Monitoring Periods.
Monitoring requirements in this permit begin in the first full quarter following either
April 1, 2009 or your date of discharge authorization, whichever date comes later. If your
monitoring is required on a quarterly basis (e.g., benchmark monitoring), you must monitor at
least once in each of the following 3-month intervals:
January 1 – March 31;
April 1 – June 30;
July 1 – September 30; and
October 1 – December 31.
For example, if you obtain permit coverage on June 2, 2009, then your first monitoring quarter is
July 1 - September 30, 2009. This monitoring schedule may be modified in accordance with Part
6.1.6 if the revised schedule is documented with your SWPPP and provided to EPA with your
first monitoring report.
Stormwater Discharges Associated With Industrial Activity 34
General Permit
6.1.8 Monitoring for Allowable Non-Stormwater Discharges
You are only required to monitor allowable non-stormwater discharges (as delineated in
Part 1.1.3) when they are commingled with stormwater discharges associated with industrial
activity.
6.2 Required Monitoring.
This permit includes five types of required analytical monitoring, one or more of which
may apply to your discharge:
Quarterly benchmark monitoring (see Part 6.2.1)
Annual effluent limitations guidelines monitoring (see Part 6.2.2);
State- or Tribal-specific monitoring (see Part 6.2.3);
Impaired waters monitoring (see Part 6.2.4); and
Other monitoring as required by EPA (see Part 6.2.5).
When more than one type of monitoring for the same parameter at the same outfall
applies (e.g., total suspended solids once per year for an effluent limit and once per quarter for
benchmark monitoring at a given outfall), you may use a single sample to satisfy both
monitoring requirements (i.e., one sample satisfying both the annual effluent limit sample and
one of the 4 quarterly benchmark monitoring samples).
All required monitoring must be conducted in accordance with the procedures described
in Appendix B, Subsection 10.D.
6.2.1 Benchmark Monitoring.
This permit stipulates pollutant benchmark concentrations that may be applicable to your
discharge. The benchmark concentrations are not effluent limitations; a benchmark exceedance,
therefore, is not a permit violation. Benchmark monitoring data are primarily for your use to
determine the overall effectiveness of your control measures and to assist you in knowing when
additional corrective action(s) may be necessary to comply with the effluent limitations in Part 2.
6.2.1.1 Applicability of Benchmark Monitoring. You must monitor for any benchmark
parameters specified for the industrial sector(s), both primary industrial activity and any
co-located industrial activities, applicable to your discharge. Your industry-specific
benchmark concentrations are listed in the sector-specific sections of Part 8. If your
facility is in one of the industrial sectors subject to benchmark concentrations that are
hardness-dependent, you are required to submit to EPA with your first benchmark report
a hardness value, established consistent with the procedures in Appendix J, which is
representative of your receiving water.
Samples must be analyzed consistent with 40 CFR Part 136 analytical methods and using
test procedures with quantitation limits at or below benchmark values for all benchmark
parameters for which you are required to sample.
Stormwater Discharges Associated With Industrial Activity 35
General Permit
6.2.1.2 Benchmark Monitoring Schedule. Benchmark monitoring must be conducted quarterly,
as identified in Part 6.1.7, for your first 4 full quarters of permit coverage commencing no
earlier than April 1, 2009. Facilities in climates with irregular stormwater runoff, as
described in Part 6.1.6, may modify this quarterly schedule provided that this revised
schedule is reported to EPA when the first benchmark sample is collected and reported,
and that this revised schedule is kept with the facility’s SWPPP as specified in Part 5.4.
Data not exceeding benchmarks: After collection of 4 quarterly samples, if the average
of the 4 monitoring values for any parameter does not exceed the benchmark, you have
fulfilled your monitoring requirements for that parameter for the permit term. For
averaging purposes, use a value of zero for any individual sample parameter, analyzed
using procedures consistent with Part 6.2.1.1, which is determined to be less than the
method detection limit. For sample values that fall between the method detection level
and the quantitation limit (i.e., a confirmed detection but below the level that can be
reliably quantified), use a value halfway between zero and the quantitation limit.
Data exceeding benchmarks: After collection of 4 quarterly samples, if the average of
the 4 monitoring values for any parameter exceeds the benchmark, you must, in
accordance with Part 3.2, review the selection, design, installation, and implementation of
your control measures to determine if modifications are necessary to meet the effluent
limits in this permit, and either:
Make the necessary modifications and continue quarterly monitoring until you
have completed 4 additional quarters of monitoring for which the average does
not exceed the benchmark; or
Make a determination that no further pollutant reductions are technologically
available and economically practicable and achievable in light of best industry
practice to meet the technology-based effluent limits or are necessary to meet the
water-quality-based effluent limitations in Parts 2 of this permit, in which case
you must continue monitoring once per year. You must also document your
rationale for concluding that no further pollutant reductions are achievable, and
retain all records related to this documentation with your SWPPP. You must also
notify EPA of this determination in your next benchmark monitoring report.
In accordance with Part 3.2, you must review your control measures and perform any
required corrective action immediately (or document why no corrective action is
required), without waiting for the full 4 quarters of monitoring data, if an exceedance of
the 4 quarter average is mathematically certain. If after modifying your control measures
and conducting 4 additional quarters of monitoring, your average still exceeds the
benchmark (or if an exceedance of the benchmark by the 4 quarter average is
mathematically certain prior to conducting the full 4 additional quarters of monitoring),
you must again review your control measures and take one of the two actions above.
Stormwater Discharges Associated With Industrial Activity 36
General Permit
Natural background pollutant levels: Following the first 4 quarters of benchmark
monitoring (or sooner if the exceedance is triggered by less than 4 quarters of data, see
above), if the average concentration of a pollutant exceeds a benchmark value, and you
determine that exceedance of the benchmark is attributable solely to the presence of that
pollutant in the natural background, you are not required to perform corrective action or
additional benchmark monitoring provided that:
The average concentration of your benchmark monitoring results is less than or
equal to the concentration of that pollutant in the natural background;
You document and maintain with your SWPPP, as required in Part 5.4, your
supporting rationale for concluding that benchmark exceedances are in fact
attributable solely to natural background pollutant levels. You must include in
your supporting rationale any data previously collected by you or others
(including literature studies) that describe the levels of natural background
pollutants in your stormwater discharge; and
You notify EPA on your final quarterly benchmark monitoring report that the
benchmark exceedances are attributable solely to natural background pollutant
levels.
Natural background pollutants include those substances that are naturally occurring in
soils or groundwater. Natural background pollutants do not include legacy pollutants
from earlier activity on your site, or pollutants in run-on from neighboring sources which
are not naturally occurring.
6.2.1.3 Exception for Inactive and Unstaffed Sites. The requirement for benchmark monitoring
does not apply at a facility that is inactive and unstaffed, as long as there are no industrial
materials or activities exposed to stormwater. To invoke this exception, you must do the
following:
Maintain a statement onsite with your SWPPP stating that the site is inactive and
unstaffed, and that there are no industrial materials or activities exposed to
stormwater in accordance with the substantive requirements in 40 CFR 122.26(g)
and sign and certify the statement in accordance with Appendix B, Subsection 11;
and
If circumstances change and industrial materials or activities become exposed to
stormwater or your facility becomes active and/or staffed, this exception no
longer applies and you must immediately begin complying with the applicable
benchmark monitoring requirements under Part 6.2 as if you were in your first
year of permit coverage. You must indicate in your first benchmark monitoring
report that your facility has materials or activities exposed to stormwater or has
become active and/or staffed.
If you are not qualified for this exception at the time you are authorized under this
permit, but during the permit term you become qualified because your facility is
inactive and unstaffed, and there are no industrial materials or activities that are
exposed to stormwater, then you must notify EPA of this change in your next
benchmark monitoring report. You may discontinue benchmark monitoring once
Stormwater Discharges Associated With Industrial Activity 37
General Permit
you have notified EPA, and prepared and signed the certification statement
described above concerning your facility’s qualification for this special exception.
Note: This exception has different requirements for Sectors G, H, and J (see Part 8).
6.2.2 Effluent Limitations Monitoring.
6.2.2.1 Monitoring Based on Effluent Limitations Guidelines. Table 6-1 identifies the
stormwater discharges subject to effluent limitation guidelines that are authorized for
coverage under this permit. Beginning in the first full quarter following April 1, 2009 or
your date of discharge authorization, whichever date comes later, you must monitor once
per year at each outfall containing the discharges identified in Table 6-1 for the
parameters specified in the sector-specific section of Part 8.
Table 6-1. Required Monitoring for Effluent Limits Based on Effluent Limitations
Guidelines
Regulated Activity Effluent Limit Monitoring
Frequency
Sample
Type
Discharges resulting from spray down or intentional
wetting of logs at wet deck storage areas
See Part 8.A.7 1/year Grab
Runoff from phosphate fertilizer manufacturing
facilities that comes into contact with any raw
materials, finished product, by-products or waste
products (SIC 2874)
See Part 8.C.4 1/year Grab
Runoff from asphalt emulsion facilities See Part 8.D.4 1/year Grab
Runoff from material storage piles at cement
manufacturing facilities
See Part 8.E.5 1/year Grab
Mine dewatering discharges at crushed stone,
construction sand and gravel, or industrial sand
mining facilities
See Part 8.J.9 1/year Grab
Runoff from hazardous waste landfills See Part 8.K.6 1/year Grab
Runoff from non-hazardous waste landfills See Part 8.L.10 1/year Grab
Runoff from coal storage piles at steam electric
generating facilities
See Part 8.O.8
1/year
Grab
6.2.2.2 Substantially Identical Outfalls. You must monitor each outfall discharging runoff from
any regulated activity identified in Table 6-1. The substantially identical outfall
monitoring provisions are not available for numeric effluent limits monitoring.
6.2.3 State or Tribal Provisions Monitoring
6.2.3.1 Sectors Required to Conduct State or Tribal Monitoring. You must comply with any
State or Tribal monitoring requirements (see Part 9) applicable to your facility’s location.
6.2.3.2 State or Tribal Monitoring Schedule. If a monitoring frequency is not specified for an
applicable requirement in Part 9, you must monitor once per year for the entire permit term.
Stormwater Discharges Associated With Industrial Activity 38
General Permit
6.2.4 Discharges to Impaired Waters Monitoring.
6.2.4.1 Permittees Required to Monitor Discharges to Impaired Waters. If you discharge to an
impaired water, you must monitor for all pollutants for which the waterbody is impaired
and for which a standard analytical method exists (see 40 CFR Part 136).
If the pollutant for which the waterbody is impaired is suspended solids, turbidity or
sediment/sedimentation, you must monitor for Total Suspended Solids (TSS). If the
pollutant for which the waterbody is impaired is expressed in the form of an indicator or
surrogate pollutant, you must monitor for that indicator or surrogate pollutant. No
monitoring is required when a waterbody’s biological communities are impaired but no
pollutant, including indicator or surrogate pollutants, is specified as causing the
impairment, or when a waterbody’s impairment is related to hydrologic modifications,
impaired hydrology, or temperature.
6.2.4.2 Impaired Waters Monitoring Schedule.
Discharges to impaired waters without an EPA approved or established TMDL:
Beginning in the first full quarter following April 1, 2009 or your date of discharge
authorization, whichever date comes later, you must monitor once per year at each outfall
(except substantially identical outfalls) discharging stormwater to impaired waters
without an EPA approved or established TMDL. This monitoring requirement does not
apply after one year if the pollutant for which the waterbody is impaired is not detected
above natural background levels in your stormwater discharge, and you document, as
required in Part 5.4 (Additional Documentation Requirements), that this pollutant is not
expected to be present above natural background levels in your discharge.
If the pollutant for which the water is impaired is not present and not expected to be
present in your discharge, or it is present but you have determined that its presence is
caused solely by natural background sources, you should include a notification to this
effect in your first monitoring report, after which you may discontinue annual
monitoring. To support a determination that the pollutant’s presence is caused solely by
natural background sources, you must keep the following documentation with your
SWPPP records:
An explanation of why you believe that the presence of the pollutant causing the
impairment in your discharge is not related to the activities at your facility; and
Data and/or studies that tie the presence of the pollutant causing the impairment in
your discharge to natural background sources in the watershed.
Natural background pollutants include those substances that are naturally occurring in
soils or groundwater. Natural background pollutants do not include legacy pollutants
from earlier activity on your site, or pollutants in run-on from neighboring sources which
are not naturally occurring.
Stormwater Discharges Associated With Industrial Activity 39
General Permit
Discharges to impaired waters with an EPA approved or established TMDL: For
stormwater discharges to waters for which there is an EPA approved or established
TMDL, you are not required to monitor for the pollutant for which the TMDL was
written unless EPA informs you, upon examination of the applicable TMDL and/or
WLA, that you are subject to such a requirement consistent with the assumptions of the
applicable TMDL and/or WLA. EPA’s notice will include specifications on which
pollutant to monitor and the required monitoring frequency during the first year of permit
coverage. Following the first year of monitoring:
If the TMDL pollutant is not detected in any of your first year samples, you may
discontinue further sampling, unless the TMDL has specific instructions to the
contrary, in which case you must follow those instructions. You must keep
records of this finding onsite with your SWPPP.
If you detect the presence of the pollutant causing the impairment in your
stormwater discharge for any of the samples collected in your first year, you must
continue monitoring annually throughout the term of this permit, unless the
TMDL specifies more frequent monitoring, in which case you must follow the
TMDL requirements.
6.2.5 Additional Monitoring Required by EPA.
EPA may notify you of additional discharge monitoring requirements. Any such notice
will briefly state the reasons for the monitoring, locations, and parameters to be monitored,
frequency and period of monitoring, sample types, and reporting requirements.
6.3 Follow-up Actions if Discharge Exceeds Numeric Effluent Limit.
You must conduct follow-up monitoring within 30 calendar days (or during the next
qualifying runoff event, should none occur within 30 days) of implementing corrective action(s)
taken pursuant to Part 3 in response to an exceedance of a numeric effluent limit contained in
this permit. See Part 9 for specific monitoring requirements applicable to individual States or
Tribes. Monitoring must be performed for any pollutant(s) that exceeds the effluent limit. If this
follow-up monitoring exceeds the applicable effluent limitation, you must comply with both
Parts 6.3.1 and 6.3.2.
6.3.1 Submit an Exceedance Report.
You must submit an Exceedance Report consistent with Part 7.3.
6.3.2 Continue to Monitor.
You must continue to monitor, at least quarterly, until your discharge is in compliance
with the effluent limit or until EPA waives the requirement for additional monitoring.
Stormwater Discharges Associated With Industrial Activity 40
General Permit
7. Reporting and Recordkeeping
7.1 Reporting Monitoring Data to EPA.
All monitoring data collected pursuant to Parts 6.2 and 6.3 must be submitted to EPA
using EPA’s online eNOI system (www.epa.gov/npdes/eNOI) no later than 30 days (email date
or postmark date) after you have received your complete laboratory results for all monitored
outfalls for the reporting period. If you cannot access eNOI, paper reporting forms must be
submitted by the same deadline to the appropriate address identified in Part 7.6.1. If you are
using paper reporting forms, EPA strongly recommends that you use the MSGP discharge
monitoring report (MDMR) available at www.epa.gov/npdes/stormwater/msgp. See Part 9 for
specific reporting requirements applicable to individual States or Tribes.
For benchmark monitoring, note that you are required to submit sampling results to EPA
no later than 30 days after receiving laboratory results for each quarter that you are required to
collect benchmark samples, in accordance with Part 6.2.1.2. If you collect multiple samples in a
single quarter (e.g., due to adverse weather conditions, climates with irregular stormwater runoff,
or areas subject to snow), you are required to submit all sampling results to EPA within 30 days
of receiving the laboratory results.
7.2 Annual Report
You must submit an annual report to EPA that includes the findings from your Part 4.3
comprehensive site inspection and any corrective action documentation as required in Part 3.4.
If corrective action is not yet completed at the time of submission of this annual report, you must
describe the status of any outstanding corrective action(s). In addition to the information
required in Parts 3.4 (Corrective Action Report) and 4.3.2 (Comprehensive Site Inspection
Documentation), you must include the following information with your annual report:
- Facility name
- NPDES permit tracking number
- Facility physical address
- Contact person name, title, and phone number
EPA strongly recommends that you submit this report using the Annual Reporting Form
provided as Appendix I. You must submit the annual report to EPA within 45 days (postmark
date) after conducting the comprehensive site inspection to the address identified in Part 7.6.1.
7.3 Exceedance Report for Numeric Effluent Limits
If follow-up monitoring pursuant to Part 6.3 exceeds a numeric effluent limit, you must
submit an Exceedance Report to EPA no later than 30 days after you have received your lab
results. Your report must include the following:
NPDES permit tracking number;
Stormwater Discharges Associated With Industrial Activity 41
General Permit
Facility name, physical address and location;
Name of receiving water;
Monitoring data from this and the preceding monitoring event(s);
An explanation of the situation; what you have done and intend to do (should your
corrective actions not yet be complete) to correct the violation; and
An appropriate contact name and phone number.
7.4 Additional Reporting.
In addition to the reporting requirements stipulated in Part 7, you are also subject to the
standard permit reporting provisions of Appendix B, Subsection 12.
Where applicable, you must submit the following reports to the appropriate EPA
Regional Office listed in Part 7.6.2, as applicable. If you discharge through an MS4, you must
also submit these reports to the MS4 operator (identified pursuant to Part 5.1.2).
24-hour reporting (see Appendix B, Subsection 12.F) - You must report any
noncompliance which may endanger health or the environment. Any information
must be provided orally within 24 hours from the time you become aware of the
circumstances;
5-day follow-up reporting to the 24 hour reporting (see Appendix B, Subsection
12.F) - A written submission must also be provided within five days of the time
you become aware of the circumstances;
Reportable quantity spills (see Part 2.1.2.4) - You must provide notification, as
required under Part 2.1.2.4, as soon as you have knowledge of a leak, spill, or
other release containing a hazardous substance or oil in an amount equal to or in
excess of a reportable quantity.
Where applicable, you must submit the following reports to EPA Headquarters at the
appropriate address in Part 7.6.1:
Planned changes (see Appendix B, Subsection 12.A) – You must give notice to
EPA as soon as possible of any planned physical alterations or additions to the
permitted facility that qualify the facility as a new source or that could
significantly change the nature or significantly increase the quantity of pollutants
discharged;
Anticipated noncompliance (see Appendix B, Subsection 12.B) – You must give
advance notice to EPA of any planned changes in the permitted facility or activity
which you anticipate will result in noncompliance with permit requirements;
Transfer of ownership and/or operation – You must submit a complete and
accurate NOI in accordance with the requirements of Appendix G of this permit
and by the deadlines specified in Table 1-2;
Compliance schedules (see Appendix B, Subsection 12.F) - Reports of
compliance or noncompliance with, or any progress reports on, interim and final
requirements contained in any compliance schedule of this permit must be
submitted no later than 14 days following each schedule date;
Stormwater Discharges Associated With Industrial Activity 42
General Permit
Other noncompliance (see Appendix B, Subsection 12.G) - You must report all
instances of noncompliance not reported in your monitoring report (pursuant to
Part 7.1), compliance schedule report, or 24-hour report at the time monitoring
reports are submitted; and
Other information (see Appendix B, Subsection 12.H) – You must promptly
submit facts or information if you become aware that you failed to submit
relevant facts in your NOI, or that you submitted incorrect information in your
NOI or in any report.
7.5 Recordkeeping.
You must retain copies of your SWPPP (including any modifications made during the
term of this permit), additional documentation requirements pursuant to Part 5.4 (including
documentation related to corrective actions taken pursuant to Part 3), all reports and
certifications required by this permit, monitoring data, and records of all data used to complete
the NOI to be covered by this permit, for a period of at least 3 years from the date that your
coverage under this permit expires or is terminated.
7.6 Addresses for Reports
7.6.1 EPA Addresses
Paper copies of any reports required in Part 6 and 7, not otherwise submitted
electronically via EPA’s eNOI system (www.epa.gov/npdes/eNOI) must be sent to one of the
following addresses:
Via U.S. mail:
U.S. Environmental Protection Agency
Office of Water, Water Permits Division
Mail Code 4203M, ATTN: MSGP Reports
1200 Pennsylvania Avenue, NW
Washington, D.C. 20460
Or Via Overnight/Express Delivery:
U.S. Environmental Protection Agency
Office of Water, Water Permits Division
Room 7420, ATTN: MSGP Reports
1201 Constitution Avenue, NW
Washington, D.C. 20004
Phone number: 202-564-9545
Notices of Intent and Notices of Termination should be submitted using EPA’s eNOI
system (www.epa.gov/npdes/eNOI) or sent to EPA’s NOI Center (see Appendix G for the
address).
Stormwater Discharges Associated With Industrial Activity 43
General Permit
All other written correspondence concerning discharges in any State, Indian Country
land, Territory, or from any Federal facility covered under this permit and directed to the EPA,
including individual permit applications, must be sent to the address of the appropriate EPA
Regional Office listed below:
7.6.2 Regional Addresses
7.6.2.1 Region 1: Connecticut, Massachusetts, and New Hampshire, Rhode Island,
Vermont.
U.S. EPA Region 1
Office of Ecosystem Protection
One Congress Street - CIP
Boston, MA 02114
7.6.2.2 Region 2: New Jersey, New York, Puerto Rico, and Virgin Islands.
For Puerto Rico and the Virgin Islands
U.S. EPA Region 2
Caribbean Environmental Protection Division
Environmental Management Branch
Centro Europa Building
1492 Ponce de Leon Avenue, Suite 417
San Juan, PR 00907-4127
For New Jersey and New York:
(Coverage not available under this permit.)
U.S. EPA Region 2
Division of Environmental Planning and Protection
290 Broadway
New York, NY 10007-1866
7.6.2.3 Region 3: Delaware, District of Columbia, Maryland, Pennsylvania, Virginia, West
Virginia.
U.S. EPA Region 3
Water Protection Division (3WP40)
Stormwater Coordinator
1650 Arch Street
Philadelphia, PA 19103
Stormwater Discharges Associated With Industrial Activity 44
General Permit
7.6.2.4 Region 4: Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South
Carolina, Tennessee.
(Coverage not available under this permit.)
U.S. EPA Region 4
Clean Water Act Enforcement Section
Water Programs Enforcement Branch
Water Management Division
Atlanta Federal Center
61 Forsyth Street SW
Atlanta, GA 30303
7.6.2.5 Region 5: Illinois, Indiana, Michigan, Minnesota, Ohio, Wisconsin.
U.S. EPA Region 5
Water Division
NPDES Programs Branch
77 W. Jackson Blvd.
Mail Code WN16J
Chicago, IL 60604
7.6.2.6 Region 6: Arkansas, Louisiana, Oklahoma, Texas, and New Mexico (except see
Region 9 for Navajo lands, and see Region 8 for Ute Mountain Reservation lands).
U.S. EPA Region 6
Stormwater Coordinator
Compliance Assurance and Enforcement Division (6EN-WC)
EPA SW MSGP
P.O. Box 50625
Dallas, TX 75205
7.6.2.7 Region 7: Iowa, Kansas, Missouri, Nebraska.
(Coverage not available under this permit.)
U.S. EPA - Region 7
901 N. 5th Street
Kansas City, KS 66101
Stormwater Discharges Associated With Industrial Activity 45
General Permit
Stormwater Discharges Associated With Industrial Activity 46
7.6.2.8 Region 8: Colorado, Montana, North Dakota, South Dakota, Wyoming, Utah
(except see Region 9 for Goshute Reservation and Navajo Reservation lands), the
Ute Mountain Reservation in New Mexico, and the Pine Ridge Reservation in
Nebraska.
(Coverage not available under this permit.)
U.S. EPA Region 8
Stormwater Coordinator (8P-W-P)
999 18
th
Street, Suite 300
Denver, CO 80202-2466
7.6.2.9 Region 9: Arizona, California, Hawaii, Nevada, Guam, American Samoa, the
Commonwealth of the Northern Mariana Islands, the Goshute Reservation in Utah
and Nevada, the Navajo Reservation in Utah, New Mexico, and Arizona, the Duck
Valley Reservation in Idaho, Fort McDermitt Reservation in Oregon.
U.S. EPA Region 9
Water Management Division, WTR-5
Stormwater Coordinator
75 Hawthorne Street
San Francisco, CA 94105
7.6.2.10 Region 10: Alaska, Idaho, Oregon (except see Region 9 for Fort McDermitt
Reservation), Washington.
U.S. EPA Region 10
Office of Water and Watersheds OWW-130
Stormwater Coordinator
1200 6th Avenue
Seattle, WA 98101
7.6.3 State and Tribal Addresses.
See Part 9 (States and Tribes) for the addresses of applicable States or Tribes that require
submission of information to their agencies.
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector A 47
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart A – Sector A – Timber Products.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.A.1 Covered Stormwater Discharges.
The requirements in Subpart A apply to stormwater discharges associated with industrial
activity from Timber Products facilities as identified by the SIC Codes specified under Sector A
in Table D-1 of Appendix D of the permit.
8.A.2 Limitation on Coverage
8.A.2.1 Prohibition of Discharges. (See also Part 1.1.4) Not covered by this permit: stormwater
discharges from areas where there may be contact with the chemical formulations
sprayed to provide surface protection. These discharges must be covered by a separate
NPDES permit.
8.A.2.2 Authorized Non-Stormwater Discharges. (See also Part 1.1.3) Also authorized by this
permit, provided the non-stormwater component of the discharge is in compliance with
the requirements in Part 2.1.2 (Non-Numeric Effluent Limits): discharges from the
spray down of lumber and wood product storage yards where no chemical additives are
used in the spray-down waters and no chemicals are applied to the wood during storage.
8.A.3 Additional Technology-Based Effluent Limits.
8.A.3.1 Good Housekeeping. (See also Part 2.1.2.2) In areas where storage, loading and
unloading, and material handling occur, perform good housekeeping to limit the
discharge of wood debris, minimize the leachate generated from decaying wood
materials, and minimize the generation of dust.
8.A.4 Additional SWPPP Requirements.
8.A.4.1 Drainage Area Site Map. (See also Part 5.1.2) Document in your SWPPP where any of
the following may be exposed to precipitation or surface runoff: processing areas,
treatment chemical storage areas, treated wood and residue storage areas, wet decking
areas, dry decking areas, untreated wood and residue storage areas, and treatment
equipment storage areas.
8.A.4.2 Inventory of Exposed Materials. (See also Part 5.1.3.2) Where such information exists,
if your facility has used chlorophenolic, creosote, or chromium-copper-arsenic
formulations for wood surface protection or preserving, document in your SWPPP the
following: areas where contaminated soils, treatment equipment, and stored materials
still remain and the management practices employed to minimize the contact of these
materials with stormwater runoff.
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector A 48
8.A.4.3 Description of Stormwater Management Controls. (See also Part 5.1.4) Document
measures implemented to address the following activities and sources: log, lumber, and
wood product storage areas; residue storage areas; loading and unloading areas;
material handling areas; chemical storage areas; and equipment and vehicle
maintenance, storage, and repair areas. If your facility performs wood surface
protection and preservation activities, address the specific control measures, including
any BMPs, for these activities.
8.A.5 Additional Inspection Requirements.
See also Part 4.1. If your facility performs wood surface protection and preservation
activities, inspect processing areas, transport areas, and treated wood storage areas monthly to
assess the usefulness of practices to minimize the deposit of treatment chemicals on unprotected
soils and in areas that will come in contact with stormwater discharges.
8.A.6 Sector-Specific Benchmarks
Table 8.A-1 identifies benchmarks that apply to the specific subsectors of Sector A.
These benchmarks apply to both your primary industrial activity and any co-located industrial
activities, which describe your site activities.
Table 8.A-1
Subsector
(You may be subject to requirements for more than
one sector/subsector)
Parameter
Benchmark
Monitoring
Concentration
Chemical Oxygen
Demand (COD)
120.0 mg/L
Total Suspended
Solids (TSS)
100 mg/L
Subsector A1. General Sawmills and Planing Mills
(SIC 2421)
Total Zinc
1
Hardness Dependent
Total Arsenic 0.15 mg/L Subsector A2. Wood Preserving (SIC 2491)
Total Copper
1
Hardness Dependent
Subsector A3. Log Storage and Handling
(SIC 2411)
Total Suspended
Solids (TSS)
100 mg/L
Chemical Oxygen
Demand (COD)
120.0 mg/L Subsector A4. Hardwood Dimension and Flooring
Mills; Special Products Sawmills, not elsewhere
classified; Millwork, Veneer, Plywood, and Structural
Wood; Wood Pallets and Skids; Wood Containers, not
elsewhere classified; Wood Buildings and Mobile
Homes; Reconstituted Wood Products; and Wood
Products Facilities not elsewhere classified (SIC 2426,
2429, 2431-2439 (except 2434), 2441, 2448, 2449,
2451, 2452, 2493, and 2499)
Total Suspended
Solids (TSS)
100.0 mg/L
1
The benchmark values of some metals are dependent on water hardness. For these parameters, permittees must
determine the hardness of the receiving water (see Appendix J, “Calculating Hardness in Receiving Waters for
Hardness Dependent Metals,” for methodology), in accordance with Part 6.2.1.1, to identify the applicable ‘hardness
range’ for determining their benchmark value applicable to their facility. The ranges occur in 25 mg/L increments.
Hardness Dependent Benchmarks follow in the table below:
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector A 49
Water Hardness Range
Copper
(mg/L)
Zinc
(mg/L)
0-25 mg/L 0.0038 0.04
25-50 mg/L 0.0056 0.05
50-75 mg/L 0.0090 0.08
75-100 mg/L 0.0123 0.11
100-125 mg/L 0.0156 0.13
125-150 mg/L 0.0189 0.16
150-175 mg/L 0.0221 0.18
175-200 mg/L 0.0253 0.20
200-225 mg/L 0.0285 0.23
225-250 mg/L 0.0316 0.25
250+ mg/L 0.0332 0.26
8.A.7 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1
of the permit.)
Table 8.A-2 identifies effluent limits that apply to the industrial activities described
below. Compliance with these effluent limits is to be determined based on discharges from these
industrial activities independent of commingling with any other wastestreams that may be
covered under this permit.
Table 8.A-2
1
Industrial Activity
pH 6.0 - 9.0 s.u
Discharges resulting from spray down or
intentional wetting of logs at wet deck
storage areas
Debris (woody material
such as bark, twigs,
branches, heartwood, or
sapwood)
No discharge of debris that
will not pass through a
2.54-cm (1-in.) diameter
round opening
1
Monitor annually.
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector B 50
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart B – Sector B – Paper and Allied Products.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.B.1 Covered Stormwater Discharges.
The requirements in Subpart B apply to stormwater discharges associated with industrial
activity from Paper and Allied Products Manufacturing facilities, as identified by the SIC Codes
specified under Sector B in Table D-1 of Appendix D of the permit.
8.B.2 Sector-Specific Benchmarks. (See also Part 6 of the permit.)
Table 8.B-1.
Subsector
(You may be subject to requirements for more
than one sector/subsector)
Parameter
Benchmark
Monitoring
Concentration
Subsector B1. Paperboard Mills
(SIC Code 2631)
Chemical Oxygen
Demand (COD)
120 mg/L
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart C – Sector C – Chemical and Allied Products Manufacturing, and Refining.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.C.1 Covered Stormwater Discharges.
The requirements in Subpart C apply to stormwater discharges associated with industrial
activity from Chemical and Allied Products Manufacturing, and Refining facilities, as identified
by the SIC Codes specified under Sector C in Table D-1 of Appendix D of the permit.
8.C.2 Limitations on Coverage.
8.C.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) The following are not
covered by this permit: non-stormwater discharges containing inks, paints, or
substances (hazardous, nonhazardous, etc.) resulting from an onsite spill, including
materials collected in drip pans; washwater from material handling and processing
areas; and washwater from drum, tank, or container rinsing and cleaning.
8.C.3 Sector-Specific Benchmarks
Table 8.C-1 identifies benchmarks that apply to the specific subsectors of Sector C.
These benchmarks apply to both your primary industrial activity and any co-located industrial
activities.
Stormwater Discharges Associated With Industrial Activity – Sector C 51
General Permit
Table 8.C-1.
Subsector
(You may be subject to requirements for
more than one sector/subsector)
Parameter
Benchmark Monitoring
Concentration
Nitrate plus Nitrite Nitrogen 0.68 mg/L
Total Lead
1
Hardness Dependent
Total Iron 1.0 mg/L
Total Zinc
1
Hardness Dependent
Subsector C1. Agricultural Chemicals (SIC
2873-2879)
Phosphorus 2.0 mg/L
Total Aluminum 0.75 mg/ L
Total Iron 1.0 mg/L
Subsector C2. Industrial Inorganic Chemicals
(SIC 2812-2819)
Nitrate plus Nitrite Nitrogen 0.68 mg/L
Nitrate plus Nitrite Nitrogen 0.68 mg/L Subsector C3. Soaps, Detergents, Cosmetics,
and Perfumes (SIC 2841-2844)
Total Zinc
1
Hardness Dependent
Subsector C4. Plastics, Synthetics, and Resins
(SIC 2821-2824)
Total Zinc
1
Hardness Dependent
1
The benchmark values of some metals are dependent on water hardness. For these parameters, permittees must
determine the hardness of the receiving water (see Appendix J, “Calculating Hardness in Receiving Waters for
Hardness Dependent Metals,” for methodology), in accordance with Part 6.2.1.1, to identify the applicable ‘hardness
range’ for determining their benchmark value applicable to their facility. The ranges occur in 25 mg/L increments.
Hardness Dependent Benchmarks follow in the table below:
Water
Hardness
Range
Lead
(mg/L)
Zinc
(mg/L)
0-25 mg/L 0.014 0.04
25-50 mg/L 0.023 0.05
50-75 mg/L 0.045 0.08
75-100 mg/L 0.069 0.11
100-125 mg/L 0.095 0.13
125-150 mg/L 0.122 0.16
150-175 mg/L 0.151 0.18
175-200 mg/L 0.182 0.20
200-225 mg/L 0.213 0.23
225-250 mg/L 0.246 0.25
250+ mg/L 0.262 0.26
8.C.4 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1
of the permit.)
Table 8.C-2 identifies effluent limits that apply to the industrial activities described
below. Compliance with these effluent limits is to be determined based on discharges from these
industrial activities independent of commingling with any other wastestreams that may be
covered under this permit.
Stormwater Discharges Associated With Industrial Activity – Sector C 52
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector C 53
Table 8.C-2
1
Industrial Activity Parameter Effluent Limit
105.0 mg/L, daily maximum Total Phosphorus (as P)
35 mg/L,
30-day avg.
75.0 mg/L,
daily maximum
Runoff from phosphate fertilizer
manufacturing facilities that comes into
contact with any raw materials, finished
product, by-products or waste products
(SIC 2874)
Fluoride
25.0 mg/L,
30-day avg.
1
Monitor annually.
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart D – Sector D – Asphalt Paving and Roofing Materials and Lubricant
Manufacturing.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.D.1 Covered Stormwater Discharges.
The requirements in Subpart D apply to stormwater discharges associated with industrial
activity from Asphalt Paving and Roofing Materials and Lubricant Manufacturing facilities, as
identified by the SIC Codes specified under Sector D in Table D-1 of Appendix D of the permit.
8.D.2 Limitations on Coverage.
The following stormwater discharges associated with industrial activity are not
authorized by this permit (See also Part 1.1.4)
8.D.2.1 Discharges from petroleum refining facilities, including those that manufacture asphalt
or asphalt products, that are subject to nationally established effluent limitation
guidelines found in 40 CFR Part 419 (Petroleum Refining); or
8.D.2.2 Discharges from oil recycling facilities; or
8.D.2.3 Discharges associated with fats and oils rendering.
8.D.3 Sector-Specific Benchmarks
Table 8.D-1 identifies benchmarks that apply to the specific subsectors of Sector D.
These benchmarks apply to both your primary industrial activity and any co-located industrial
activities, which describe your site activities.
Table 8.D-1.
Subsector
Parameter
Benchmark Monitoring
Concentration
Subsector D1. Asphalt Paving and Roofing
Materials (SIC 2951, 2952)
Total Suspended Solids
(TSS)
100 mg/L
Stormwater Discharges Associated With Industrial Activity – Sector D 54
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector D 55
8.D.4 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1
of the permit.)
Table 8.D-2 identifies effluent limits that apply to the industrial activities described
below. Compliance with these effluent limits is to be determined based on discharges from these
industrial activities independent of commingling with any other wastestreams that may be
covered under this permit.
Table 8.D-2
1
Industrial Activity Parameter Effluent Limit
23.0 mg/L,
daily maximum
15.0 mg/L,
30-day avg.
Total Suspended Solids
(TSS)
pH 6.0 - 9.0 s.u.
15.0 mg/L,
daily maximum
Discharges from asphalt emulsion facilities.
Oil and Grease
10 mg/L,
30-day avg.
1
Monitor annually.
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart E – Sector E – Glass, Clay, Cement, Concrete, and Gypsum Products.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.E.1 Covered Stormwater Discharges.
The requirements in Subpart E apply to stormwater discharges associated with industrial
activity from Glass, Clay, Cement, Concrete, and Gypsum Products facilities, as identified by the
SIC Codes specified under Sector E in Table D-1 of Appendix D of the permit.
8.E.2 Additional Technology-Based Effluent Limits.
8.E.2.1 Good Housekeeping Measures. (See also Part 2.1.2.2) With good housekeeping, prevent
or minimize the discharge of spilled cement, aggregate (including sand or gravel), kiln
dust, fly ash, settled dust, or other significant material in stormwater from paved
portions of the site that are exposed to stormwater. Consider sweeping regularly or
using other equivalent measures to minimize the presence of these materials. Indicate in
your SWPPP the frequency of sweeping or equivalent measures. Determine the
frequency based on the amount of industrial activity occurring in the area and the
frequency of precipitation, but it must be performed at least once a week if cement,
aggregate, kiln dust, fly ash, or settled dust are being handled or processed. You must
also prevent the exposure of fine granular solids (cement, fly ash, kiln dust, etc.) to
stormwater, where practicable, by storing these materials in enclosed silos, hoppers, or
buildings, or under other covering.
8.E.3 Additional SWPPP Requirements.
8.E.3.1 Drainage Area Site Map. (See also Part 5.1.2) Document in the SWPPP the locations of
the following, as applicable: bag house or other dust control device;
recycle/sedimentation pond, clarifier, or other device used for the treatment of process
wastewater; and the areas that drain to the treatment device.
8.E.3.2 Certification. (See also Part 5.1.3.4) For facilities producing ready-mix concrete,
concrete block, brick, or similar products, include in the non-stormwater discharge
certification a description of measures that ensure that process waste waters resulting
from washing trucks, mixers, transport buckets, forms, or other equipment are
discharged in accordance with NPDES requirements or are recycled.
8.E.4 Sector-Specific Benchmarks.
Table 8.E-1 identifies benchmarks that apply to the specific subsectors of Sector E.
These benchmarks apply to both your primary industrial activity and any co-located industrial
activities, which describe your site activities.
Stormwater Discharges Associated With Industrial Activity – Sector E 56
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector E 57
Table 8.E-1.
Subsector
(You may be subject to requirements for
more than one sector/subsector)
Parameter
Benchmark
Monitoring Cutoff
Concentration
Subsector E1. Clay Product Manufacturers
(SIC 3251-3259, 3261-3269)
Total Aluminum 0.75 mg/L
Total Suspended Solids
(TSS)
100 mg/L Subsector E2. Concrete and Gypsum Product
Manufacturers (SIC 3271-3275)
Total Iron 1.0 mg/L
8.E.5 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1
of the permit.)
Table 8.E-2 identifies effluent limits that apply to the industrial activities described
below. Compliance with these limits is to be determined based on discharges from these
industrial activities independent of commingling with any other wastestreams that may be
covered under this permit.
Table 8.E-2
1
Industrial Activity Parameter Effluent Limit
Total Suspended Solids
(TSS)
50 mg/L, daily
maximum
Discharges from material storage piles at
cement manufacturing facilities
pH 6.0 - 9.0 s.u.
1
Monitor annually.
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart F – Sector F – Primary Metals.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.F.1 Covered Stormwater Discharges.
The requirements in Subpart F apply to stormwater discharges associated with industrial
activity from Primary Metals facilities, as identified by the SIC Codes specified under Sector F
in Table D-1 of Appendix D of the permit.
8.F.2 Additional Technology-Based Effluent Limits
8.F.2.1 Good Housekeeping Measures. (See also Part 2.1.2.2) As part of your good
housekeeping program, include a cleaning and maintenance program for all impervious
areas of the facility where particulate matter, dust, or debris may accumulate, especially
areas where material loading and unloading, storage, handling, and processing occur;
and, where practicable, the paving of areas where vehicle traffic or material storage
occur but where vegetative or other stabilization methods are not practicable (institute a
sweeping program in these areas too). For unstabilized areas where sweeping is not
practicable, consider using stormwater management devices such as sediment traps,
vegetative buffer strips, filter fabric fence, sediment filtering boom, gravel outlet
protection, or other equivalent measures that effectively trap or remove sediment.
8.F.3 Additional SWPPP Requirements.
8.F.3.1 Drainage Area Site Map. (See also Part 5.1.2) Identify in the SWPPP where any of the
following activities may be exposed to precipitation or surface runoff: storage or
disposal of wastes such as spent solvents and baths, sand, slag and dross; liquid storage
tanks and drums; processing areas including pollution control equipment (e.g.,
baghouses); and storage areas of raw material such as coal, coke, scrap, sand, fluxes,
refractories, or metal in any form. In addition, indicate where an accumulation of
significant amounts of particulate matter could occur from such sources as furnace or
oven emissions, losses from coal and coke handling operations, etc., and could result in
a discharge of pollutants to waters of the United States.
8.F.3.2 Inventory of Exposed Material. (See also Part 5.1.3.2) Include in the inventory of
materials handled at the site that potentially may be exposed to precipitation or runoff,
areas where deposition of particulate matter from process air emissions or losses during
material-handling activities are possible
8.F.4 Additional Inspection Requirements. (See also Part 4.1) As part of conducting your
quarterly routine facility inspections (Part 4.1), address all potential sources of pollutants,
including (if applicable) air pollution control equipment (e.g., baghouses, electrostatic
precipitators, scrubbers, and cyclones), for any signs of degradation (e.g., leaks,
Stormwater Discharges Associated With Industrial Activity – Sector F 58
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector F 59
corrosion, or improper operation) that could limit their efficiency and lead to excessive
emissions. Consider monitoring air flow at inlets and outlets (or use equivalent
measures) to check for leaks (e.g., particulate deposition) or blockage in ducts. Also
inspect all process and material handling equipment (e.g., conveyors, cranes, and
vehicles) for leaks, drips, or the potential loss of material; and material storage areas
(e.g., piles, bins, or hoppers for storing coke, coal, scrap, or slag, as well as chemicals
stored in tanks and drums) for signs of material losses due to wind or stormwater runoff.
8.F.5 Sector-Specific Benchmarks. (See also Part 6 of the permit.)
Table 8.F-1.
Subsector
(You may be subject to requirements for
more than one sector/subsector)
Parameter
Benchmark Monitoring
Cutoff Concentration
Total Aluminum 0.75 mg/L Subsector F1. Steel Works, Blast Furnaces,
and Rolling and Finishing Mills
(SIC 3312-3317)
Total Zinc
1
Hardness Dependent
Total Aluminum 0.75 mg/L
Total Suspended Solids (TSS) 100 mg/L
Total Copper
1
Hardness Dependent
Total Iron 1.0 mg/L
Subsector F2. Iron and Steel Foundries
(SIC 3321-3325)
Total Zinc
1
Hardness Dependent
Total Copper
1
Hardness Dependent Subsector F3. Rolling, Drawing, and
Extruding of Nonferrous Metals
(SIC 3351-3357)
Total Zinc
1
Hardness Dependent
Total Copper
1
Hardness Dependent Subsector F4. Nonferrous Foundries
(SIC 3363-3369)
Total Zinc
1
Hardness Dependent
1
The benchmark values of some metals are dependent on water hardness. For these parameters, permittees must
determine the hardness of the receiving water (see Appendix J, “Calculating Hardness in Receiving Waters for
Hardness Dependent Metals,” for methodology), in accordance with Part 6.2.1.1, to identify the applicable ‘hardness
range’ for determining their benchmark value applicable to their facility. The ranges occur in 25 mg/L increments.
Hardness Dependent Benchmarks follow in the table below:
Water Hardness Range
Copper
(mg/L)
Zinc
(mg/L)
0-25 mg/L 0.0038 0.04
25-50 mg/L 0.0056 0.05
50-75 mg/L 0.0090 0.08
75-100 mg/L 0.0123 0.11
100-125 mg/L 0.0156 0.13
125-150 mg/L 0.0189 0.16
150-175 mg/L 0.0221 0.18
175-200 mg/L 0.0253 0.20
200-225 mg/L 0.0285 0.23
225-250 mg/L 0.0316 0.25
250+ mg/L 0.0332 0.26
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart G – Sector G – Metal Mining.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.G.1 Covered Stormwater Discharges.
The requirements in Subpart G apply to stormwater discharges associated with industrial
activity from Metal Mining facilities, including mines abandoned on Federal lands, as identified
by the SIC Codes specified under Sector G in Table D-1 of Appendix D. Coverage is required
for metal mining facilities that discharge stormwater contaminated by contact with, or that has
come into contact with, any overburden, raw material, intermediate product, finished product,
byproduct, or waste product located on the site of the operation.
8.G.1.1 Covered Discharges from Inactive Facilities. All stormwater discharges.
8.G.1.2 Covered Discharges from Active and Temporarily Inactive Facilities. Only the
stormwater discharges from the following areas are covered: waste rock and overburden
piles if composed entirely of stormwater and not combining with mine drainage; topsoil
piles; offsite haul and access roads; onsite haul and access roads constructed of waste
rock, overburden, or spent ore if composed entirely of stormwater and not combining
with mine drainage; onsite haul and access roads not constructed of waste rock,
overburden, or spent ore except if mine drainage is used for dust control; runoff from
tailings dams or dikes when not constructed of waste rock or tailings and no process
fluids are present; runoff from tailings dams or dikes when constructed of waste rock or
tailings and no process fluids are present, if composed entirely of stormwater and not
combining with mine drainage; concentration building if no contact with material piles;
mill site if no contact with material piles; office or administrative building and housing
if mixed with stormwater from industrial area; chemical storage area; docking facility if
no excessive contact with waste product that would otherwise constitute mine drainage;
explosive storage; fuel storage; vehicle and equipment maintenance area and building;
parking areas (if necessary); power plant; truck wash areas if no excessive contact with
waste product that would otherwise constitute mine drainage; unreclaimed, disturbed
areas outside of active mining area; reclaimed areas released from reclamation
requirements prior to December 17, 1990; and partially or inadequately reclaimed areas
or areas not released from reclamation requirements.
8.G.1.3 Covered Discharges from Exploration and Construction of Metal Mining and/or Ore
Dressing Facilities. All stormwater discharges.
8.G.1.4 Covered Discharges from Facilities Undergoing Reclamation. All stormwater
discharges.
Stormwater Discharges Associated With Industrial Activity – Sector G 60
General Permit
8.G.2 Limitations on Coverage.
8.G.2.1 Prohibition of Stormwater Discharges. Stormwater discharges not authorized by this
permit: discharges from active metal mining facilities that are subject to effluent
limitation guidelines for the Ore Mining and Dressing Point Source Category (40 CFR
Part 440).
NOTE: Stormwater runoff from these sources are subject to 40 CFR Part 440 if they
are mixed with other discharges subject to Part 440. In this case, they are not eligible
for coverage under this permit. Discharges from overburden/waste rock and
overburden/waste rock-related areas are not subject to 40 CFR Part 440 unless they: (1)
drain naturally (or are intentionally diverted) to a point source; and (2) combine with
''mine drainage'' that is otherwise regulated under the Part 440 regulations. For such
sources, coverage under this permit would be available if the discharge composed
entirely of stormwater does not combine with other sources of mine drainage that are
not subject to 40 CFR Part 440, and meets the other eligibility criteria contained in Part
1.2 of the permit. Permit applicants bear the initial responsibility for determining if they
are eligible for coverage under this permit, or must seek coverage under another
NPDES permit. EPA recommends that permit applicants contact the relevant NPDES
permit issuance authority for assistance to determine the nature and scope of the ''active
mining area'' on a mine-by-mine basis, as well as to determine the appropriate
permitting mechanism for authorizing such discharges.
8.G.2.2 Prohibition of Non-Stormwater Discharges. Not authorized by this permit: adit
drainage, and contaminated springs or seeps discharging from waste rock dumps that do
not directly result from precipitation events (see also the standard Limitations on
Coverage in Part 1.1.4).
8.G.3 Definitions.
The following definitions are not intended to supersede the definitions of active and
inactive mining facilities established by 40 CFR 122.26(b)(14)(iii).
8.G.3.1 Mining operation - Consists of the active and temporarily inactive phases, and the
reclamation phase, but excludes the exploration and construction phases.
8.G.3.2 Exploration phase - Entails exploration and land disturbance activities to determine the
viability of a site. The exploration phase is not considered part of “mining operations.”
8.G.3.3 Construction phase - Includes the building of site access roads and removal of
overburden and waste rock to expose mineable minerals. The construction phase is not
considered part of “mining operations.”
8.G.3.4 Active phase - Activities including the extraction, removal or recovery of metal ore.
For surface mines, this definition does not include any land where grading has returned
the earth to a desired contour and reclamation has begun. This definition is derived
from the definition of “active mining area” found at 40 CFR 440.132(a). The active
phase is considered part of “mining operations.”
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8.G.3.5 Reclamation phase - Activities undertaken, in compliance with applicable mined land
reclamation requirements, following the cessation of the “active phase”, intended to
return the land to an appropriate post-mining land use in order to meet applicable
Federal and State reclamation requirements. The reclamation phase is considered part
of "mining operations."
8.G.3.6 Active metal mining facility - A place where work or other activity related to the
extraction, removal, or recovery of metal ore is being conducted. For surface mines, this
definition does not include any land where grading has returned the earth to a desired
contour and reclamation has begun. This definition is derived from the definition of
“active mining area” found at 40 CFR 440.132(a).
8.G.3.7 Inactive metal mining facility - A site or portion of a site where metal mining and/or
milling occurred in the past but is not an active facility as defined above, and where the
inactive portion is not covered by an active mining permit issued by the applicable State
or Federal agency. An inactive metal mining facility has an identifiable owner /
operator. Sites where mining claims are being maintained prior to disturbances
associated with the extraction, beneficiation, or processing of mined materials and sites
where minimal activities are undertaken for the sole purpose of maintaining a mining
claim are not considered either active or inactive mining facilities and do not require an
NPDES industrial stormwater permit.
8.G.3.8 Temporarily inactive metal mining facility - A site or portion of a site where metal
mining and/or milling occurred in the past but currently are not being actively
undertaken, and the facility is covered by an active mining permit issued by the
applicable State or Federal agency.
8.G.3.9 Final Stabilization - A site or portion of a site is “finally stabilized” when it has
implemented all applicable Federal and State reclamation requirements.
8.G.4 Technology-Based Effluent Limits for Clearing, Grading, and Excavation Activities.
Clearing, grading, and excavation activities being conducted as part of the exploration
and construction phase of mining activities are covered under this permit.
8.G.4.1 Management Practices for Clearing, Grading, and Excavation Activities.
8.G.4.1.1 Selecting and installing control measures. For all areas affected by clearing,
grading, and excavation activities, you must select, design, install, and
implement control measures that meet applicable Part 2 effluent limits.
8.G.4.1.2 Good Housekeeping. Litter, debris, and chemicals must be prevented from
becoming a pollutant source in stormwater discharges.
8.G.4.1.3 Retention and Detention of Stormwater Runoff. For drainage locations serving
more than one acre, sediment basins and/or temporary sediment traps should
be used. At a minimum, silt fences, vegetative buffer strips, or equivalent
sediment controls are required for all down slope boundaries (and for side
slope boundaries as necessary based on individual site conditions) of the
development area unless a sediment basin providing storage for a calculated
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volume of runoff from a 2-year, 24-hour storm or 3,600 cubic feet of storage
per acre drained is provided. You are required to remove sediment from
sediment traps or sedimentation ponds when design capacity has been reduced
by 50 percent. Due to high sediment discharges from some Sector G facilities,
permittees may need to implement a combination of structural BMP
approaches to sufficiently decrease discharge of sediment from their facilities.
8.G.4.2 Inspection of Clearing, Grading, and Excavation Activities.
8.G.4.2.1 Inspection Frequency. Inspections must be conducted either at least once
every 7 calendar days, or at least once every 14 calendar days and within 24
hours of the end of a storm event of 0.5 inches or greater. Inspection
frequency may be reduced to at least once every month if the entire site is
temporarily stabilized (pursuant to Part 8.G.4.3.2), if runoff is unlikely due to
winter (e.g., site is covered with snow or ice) or frozen conditions, or
construction is occurring during seasonal dry periods in arid areas and semi-
arid areas.
8.G.4.2.2 Location of Inspections. Inspections must include all areas of the site disturbed
by clearing, grading, and/or excavation activities and areas used for storage of
materials that are exposed to precipitation. Sedimentation and erosion control
measures must be observed to ensure proper operation. Discharge locations
must be inspected to ascertain whether erosion control measures are effective
in preventing significant impacts to waters of the United States, where
accessible. Where discharge locations are inaccessible, nearby downstream
locations must be inspected to the extent that such inspections are practicable.
Locations where vehicles enter or exit the site must be inspected for evidence
of significant off-site sediment tracking.
8.G.4.2.3 Inspection Reports. For each inspection required above, you must complete an
inspection report. At a minimum, the inspection report must include the
information required in Part 4.1.
8.G.4.3 Requirements for Cessation of Clearing, Grading, and Excavation Activities.
8.G.4.3.1 Inspections and Maintenance. Inspections and maintenance of control
measures, including BMPs, associated with clearing, grading, and excavation
activities being conducted as part of the exploration and construction phase of
a mining operation must continue until final stabilization has been achieved on
all portions of the disturbed area, or until the commencement of the active
mining phase for those areas that have been temporarily stabilized as a
precursor to mining.
8.G.4.3.2 Temporary Stabilization of Disturbed Areas. Stabilization measures should be
initiated immediately in portions of the site where clearing, grading and/or
excavation activities have temporarily ceased, but in no case more than 14
days after the clearing, grading and/or excavation activities in that portion of
the site have temporarily ceased. In arid, semiarid, and drought-stricken areas,
or in areas subject to snow or freezing conditions, where initiating perennial
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vegetative stabilization measures is not possible within 14 days after mining,
exploration, and/or construction activity has temporarily ceased, temporary
vegetative stabilization measures must be initiated as soon as practicable.
Until temporary vegetative stabilization is achieved, interim measures such as
erosion control blankets with an appropriate seed base and tackifiers must be
employed. In areas of the site, where exploration and/or construction has
permanently ceased prior to active mining, temporary stabilization measures
must be implemented to minimize mobilization of sediment or other pollutants
until such time as the active mining phase commences.
8.G.4.3.3 Final Stabilization of Disturbed Areas. Stabilization measures should be
initiated immediately in portions of the site where exploration and/or
construction activities have permanently ceased, but in no case more than 14
days after the exploration and/or construction activity in that portion of the site
has permanently ceased. In arid, semiarid, and drought-stricken areas, or in
areas subject to snow or freezing conditions, where initiating perennial
vegetative stabilization measures is not possible within 14 days after mining,
exploration, and/or construction activity has permanently ceased, final
vegetative stabilization measures must be initiated as soon as possible. Until
final stabilization is achieved temporary stabilization measures, such as
erosion control blankets with an appropriate seed base and tackifiers, must be
used.
8.G.5 Additional Technology-Based Effluent Limits.
8.G.5.1 Employee Training. (See also Part 2.1.2.9) Conduct employee training at least annually
at active and temporarily inactive sites.
8.G.5.2 Stormwater Controls. Apart from the control measures you implement to meet your Part
2 effluent limits, consider implementing the following control measures at your site.
The potential pollutants identified in Part 8.G.6.3 shall determine the priority and
appropriateness of the control measures selected.
8.G.5.2.1 Stormwater Diversions: Consider diverting stormwater away from potential
pollutant sources. Following are some options: interceptor or diversion
controls (e.g., dikes, swales, curbs, or berms); pipe slope drains; subsurface
drains; conveyance systems (e.g., channels or gutters, open-top box culverts,
and waterbars; rolling dips and road sloping; roadway surface water deflector
and culverts); or their equivalents.
8.G.5.2.2 Capping: When capping is necessary to minimize pollutant discharges in
stormwater, identify the source being capped and the material used to
construct the cap.
8.G.5.2.3 Treatment: If treatment of stormwater (e.g., chemical or physical systems, oil
and water separators, artificial wetlands) is necessary to protect water quality,
describe the type and location of treatment used. Passive and/or active
treatment of stormwater runoff is encouraged where practicable. Treated
runoff may be discharged as a stormwater source regulated under this permit
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provided the discharge is not combined with discharges subject to effluent
limitation guidelines for the Ore Mining and Dressing Point Source Category
(40 CFR Part 440).
8.G.5.3 Certification of Discharge Testing. (See also Part 5.1.3.4) Test or evaluate all outfalls
covered under this permit for the presence of specific mining-related non-stormwater
discharges such as seeps or adit discharges, or discharges subject to effluent limitations
guidelines (e.g., 40 CFR Part 440), such as mine drainage or process water.
Alternatively (if applicable), you may keep a certification with your SWPPP consistent
with Part 8.G.6.6.
8.G.6 Additional SWPPP Requirements.
8.G.6.1 Nature of Industrial Activities. (See also Part 5.1.2) Briefly document in your SWPPP
the mining and associated activities that can potentially affect the stormwater
discharges covered by this permit, including a general description of the location of the
site relative to major transportation routes and communities.
8.G.6.2 Site Map. (See also Part 5.1.2) Document in your SWPPP the locations of the following
(as appropriate): mining or milling site boundaries; access and haul roads; outline of the
drainage areas of each stormwater outfall within the facility with indications of the
types of discharges from the drainage areas; location(s) of all permitted discharges
covered under an individual NPDES permit, outdoor equipment storage, fueling, and
maintenance areas; materials handling areas; outdoor manufacturing, outdoor storage,
and material disposal areas; outdoor chemicals and explosives storage areas;
overburden, materials, soils, or waste storage areas; location of mine drainage (where
water leaves mine) or other process water; tailings piles and ponds (including proposed
ones); heap leach pads; off-site points of discharge for mine drainage and process
water; surface waters; boundary of tributary areas that are subject to effluent limitations
guidelines; and location(s) of reclaimed areas.
8.G.6.3 Potential Pollutant Sources. (See also Part 5.1.3) For each area of the mine or mill site
where stormwater discharges associated with industrial activities occur, identify the
types of pollutants (e.g., heavy metals, sediment) likely to be present in significant
amounts. Consider these factors: the mineralogy of the ore and waste rock (e.g., acid
forming); toxicity and quantity of chemicals used, produced, or discharged; the
likelihood of contact with stormwater; vegetation of site (if any); and history of
significant leaks or spills of toxic or hazardous pollutants. Also include a summary of
any existing ore or waste rock or overburden characterization data and test results for
potential generation of acid rock. If any new data is acquired due to changes in ore type
being mined, update your SWPPP with this information.
8.G.6.4 Documentation of Control Measures. Document all control measures that you
implement consistent with Part 8.G.5.2. If control measures are implemented or
planned but are not listed in Part 8.G.5.2 (e.g., substituting a less toxic chemical for a
more toxic one), include descriptions of them in your SWPPP.
8.G.6.5 Employee Training. All employee training(s) must be documented in the SWPPP.
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8.G.6.6 Certification of Permit Coverage for Commingled Non-Stormwater Discharges: If you
are able, consistent with Part 8.G.5.3 above, to certify that a particular discharge
composed of commingled stormwater and non-stormwater is covered under a separate
NPDES permit, and that permit subjects the non-stormwater portion to effluent
limitations prior to any commingling, retain such certification with your SWPPP. This
certification must identify the non-stormwater discharges, the applicable NPDES
permit(s), the effluent limitations placed on the non-stormwater discharge by the
permit(s), and the points at which the limitations are applied.
8.G.7 Additional Inspection Requirements.
(See also Part 4.1 and 8.G.4.2.) Except for areas of the site subject to clearing, grading,
and/or excavation activities conducted as part of the exploration and construction phase, which
are subject to Part 8.G.4.2.1, inspect sites at least quarterly unless adverse weather conditions
make the site inaccessible. Sites which discharge to waters designated as outstanding waters or
waters which are impaired for sediment or nitrogen must be inspected monthly. See Part 8.G.8.4
for inspection requirements for inactive and unstaffed sites.
8.G.8 Monitoring and Reporting Requirements. (See also Part 6 of the permit.)
Note: There are no Part 8.G.8 monitoring and reporting requirements for inactive and
unstaffed sites.
8.G.8.1 Benchmark Monitoring for Active Copper Ore Mining and Dressing Facilities. Active
copper ore mining and dressing facilities, must sample and analyze stormwater
discharges for the pollutants listed in Table 8.G-1.
Table 8.G-1
Subsector
(You may be subject to requirements for
more than one sector/subsector)
Parameter
Benchmark
Monitoring
Concentration
Total Suspended Solids
(TSS)
100 mg/L
Nitrate plus Nitrite
Nitrogen
0.68 mg/L
Subsector G1. Active Copper Ore Mining and
Dressing Facilities
(SIC 1021)
Chemical Oxygen Demand
(COD)
120 mg/L
8.G.8.2 Benchmark Monitoring Requirements for Discharges From Waste Rock and
Overburden Piles at Active Metal Mining Facilities. For discharges from waste rock
and overburden piles, perform benchmark monitoring once in the first year for the
parameters listed in Table 8.G-2, and twice annually in all subsequent years of coverage
under this permit for any parameters for which the benchmark has been exceeded. You
are also required to conduct analytic monitoring for the parameters listed in Table 8.G-3
in accordance with the requirements in Part 8.G.6.3. The Director may also notify you
that you must perform additional monitoring to accurately characterize the quality and
quantity of pollutants discharged from your waste rock and overburden piles.
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Table 8.G-2.
Subsector
(Discharges may be subject to
requirements for more than one
sector/subsector)
Parameter
Benchmark Monitoring
Cutoff Concentration
Total Suspended Solids (TSS) 100 mg/L
Turbidity 50 NTU
pH 6.0-9.0 s.u.
Hardness (as CaCO
3
; calc. from
Ca, Mg)
1
no benchmark value
Total Antimony 0.64 mg/L
Total Arsenic 0.15 mg/ L
Total Beryllium 0.13 mg/L
Total Cadmium
1
Hardness Dependent
Total Copper
1
Hardness Dependent
Total Iron 1.0 mg/L
Total Lead
1
Hardness Dependent
Total Mercury 0.0014 mg/L
Total Nickel
1
Hardness Dependent
Total Selenium 0.005 mg/L
Total Silver
1
Hardness Dependent
Subsector G2. Iron Ores; Copper Ores;
Lead and Zinc Ores; Gold and Silver Ores;
Ferroalloy Ores, Except Vanadium; and
Miscellaneous Metal Ores (SIC Codes
1011, 1021, 1031, 1041, 1044, 1061, 1081,
1094, 1099)
(Note: when analyzing hardness for a suite
of metals, it is more cost effective to add
analysis of calcium and magnesium, and
have hardness calculated than to require
hardness analysis separately)
Total Zinc
1
Hardness Dependent
1
The benchmark values of some metals are dependent on water hardness. For these parameters, permittees must
determine the hardness of the receiving water (see Appendix J, “Calculating Hardness in Receiving Waters for
Hardness Dependent Metals,” for methodology), in accordance with Part 6.2.1.1, to identify the applicable
‘hardness range’ for determining their benchmark value applicable to their facility. The ranges occur in 25 mg/L
increments. Hardness Dependent Benchmarks follow in the table below:
Water Hardness Range
Cadmium
(mg/L)
Copper
(mg/L)
Lead
(mg/L)
Nickel
(mg/L)
Silver
(mg/L)
Zinc
(mg/L)
0-25 mg/L 0.0005 0.0038 0.014 0.15 0.0007 0.04
25-50 mg/L 0.0008 0.0056 0.023 0.20 0.0007 0.05
50-75 mg/L 0.0013 0.0090 0.045 0.32 0.0017 0.08
75-100 mg/L 0.0018 0.0123 0.069 0.42 0.0030 0.11
100-125 mg/L 0.0023 0.0156 0.095 0.52 0.0046 0.13
125-150 mg/L 0.0029 0.0189 0.122 0.61 0.0065 0.16
150-175 mg/L 0.0034 0.0221 0.151 0.71 0.0087 0.18
175-200 mg/L 0.0039 0.0253 0.182 0.80 0.0112 0.20
200-225 mg/L 0.0045 0.0285 0.213 0.89 0.0138 0.23
225-250 mg/L 0.0050 0.0316 0.246 0.98 0.0168 0.25
250+ mg/L 0.0053 0.0332 0.262 1.02 0.0183 0.26
8.G.8.3 Additional Analytic Monitoring Requirements for Discharges From Waste Rock and
Overburden Piles at Active Metal Mining Facilities. In addition to the monitoring
required in Part 8.G.6.2 for discharges from waste rock and overburden piles, you must
also conduct monitoring for additional parameters based on the type of ore you mine at
your site. Where a parameter in Table 8.G-3 is the same as a pollutant you are required
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to monitor for in Table 8.G-2 (i.e., for all of the metals, you must use the corresponding
benchmark in Table 8.G-2 and you may use any monitoring results conducted for Part
8.G.6.2 to satisfy the monitoring requirement for that parameter for Part 8.G.6.3. For
radium and uranium, which do not have corresponding benchmarks in Table 8.G-2,
there are no applicable benchmarks.) The frequency and schedule for monitoring for
these additional parameters is the same as that specified in Part 6.2.1.2.
Table 8.G-3. Additional Monitoring Requirements for Discharges from Waste Rock and
Overburden Piles
Supplemental Requirements
Pollutants of Concern
Type of Ore Mined
Total Suspended
Solids (TSS)
pH Metals, Total
Tungsten Ore X X Arsenic, Cadmium (H), Copper (H),
Lead (H), Zinc (H)
Nickel Ore X X Arsenic, Cadmium (H), Copper (H),
Lead (H), Zinc (H)
Aluminum Ore X X Iron
Mercury Ore X X Nickel (H)
Iron Ore X X Iron (Dissolved)
Platinum Ore Cadmium (H), Copper (H), Mercury,
Lead (H), Zinc (H)
Titanium Ore X X Iron, Nickel (H), Zinc (H)
Vanadium Ore X X Arsenic, Cadmium (H), Copper (H),
Lead (H), Zinc (H)
Molybdenum X X Arsenic, Cadmium (H), Copper (H),
Lead (H), Mercury, Zinc (H)
Uranium, Radium, and
Vanadium Ore
X X Chemical Oxygen Demand, Arsenic,
Radium (Dissolved and Total),
Uranium, Zinc (H)
Note: An “X” indicated for TSS and/or pH means that you are required to monitor for those parameters. (H)
indicates that hardness must also be measured when this pollutant is measured.
8.G.8.4 Inactive and Unstaffed Sites – Conditional Exemption from No Exposure Requirements
for Quarterly Visual Assessments and Routine Facility Inspections. As a Sector G
facility, if you are seeking to exercise a waiver from the quarterly visual assessment and
routine facility inspection requirements for inactive and unstaffed sites (including
temporarily inactive sites), you are conditionally exempt from the requirement to certify
that “there are no industrial materials or activities exposed to stormwater” in Part 4.2.3.
This exemption is conditioned on the following:
If circumstances change and your facility becomes active and/or staffed, this
exception no longer applies and you must immediately begin complying with the
quarterly visual assessment requirements; and
EPA retains the authority to revoke this exemption and/or the monitoring waiver
where it is determined that the discharge causes, has a reasonable potential to cause,
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General Permit
or contributes to an instream excursion above an applicable water quality standard,
including designated uses.
Subject to the two conditions above, if your facility is inactive and unstaffed, you are
waived from the requirement to conduct quarterly visual assessments and routine
facility inspections. You are not waived from conducting the Part 4.3 comprehensive
site inspection. You are encouraged to inspect your site more frequently where you
have reason to believe that severe weather or natural disasters may have damaged
control measures or increased discharges.
Table 8.G-4. Applicability of the Multi-Sector General Permit to Stormwater Runoff From Active
Mining and Dressing Sites, Temporarily Inactive Sites, and Sites Undergoing Reclamation
Discharge/Source of Discharge Note/Comment
Piles
Waste rock/overburden If composed entirely of stormwater and not
combining with mine drainage. See note below.
Topsoil --
Roads constructed of waste rock or spent ore
Onsite haul roads If composed entirely of stormwater and not
combining with mine drainage. See note below.
Offsite haul and access roads --
Roads not constructed of waste rock or spent ore
Onsite haul roads Except if mine drainage is used for dust control
Offsite haul and access roads --
Milling/concentrating
Runoff from tailings dams and dikes when
constructed of waste rock/tailings
Except if process fluids are present and only if
composed entirely of stormwater and not
combining with mine drainage. See Note below.
Runoff from tailings dams/dikes when not
constructed of waste rock and tailings
Except if process fluids are present
Concentration building If stormwater only and no contact with piles
Mill site If stormwater only and no contact with piles
Ancillary areas
Office and administrative building and housing If mixed with stormwater from the industrial area
Chemical storage area --
Docking facility Except if excessive contact with waste product that
would otherwise constitute mine drainage
Explosive storage --
Fuel storage (oil tanks/coal piles) --
Vehicle and equipment maintenance area/building --
Parking areas But coverage unnecessary if only employee and
visitor-type parking
Power plant
Truck wash area Except when excessive contact with waste product
that would otherwise constitute mine drainage
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Table 8.G-4. Applicability of the Multi-Sector General Permit to Stormwater Runoff From Active
Mining and Dressing Sites, Temporarily Inactive Sites, and Sites Undergoing Reclamation
Reclamation-related areas
Any disturbed area (unreclaimed) Only if not in active mining area
Reclaimed areas released from reclamation
requirements prior to Dec. 17, 1990
--
Partially/inadequately reclaimed areas or areas not
released from reclamation requirements
--
Note: Stormwater runoff from these sources are subject to the NPDES program for stormwater unless mixed with
discharges subject to 40 CFR Part 440 that are regulated by another permit prior to mixing. Non-stormwater
discharges from these sources are subject to NPDES permitting and may be subject to the effluent limitation
guidelines under 40 CFR Part 440. Discharges from overburden/waste rock and overburden/waste rock-related
areas are not subject to 40 CFR Part 440 unless: (1) it drains naturally (or is intentionally diverted) to a point
source; and (2) combines with ''mine drainage'' that is otherwise regulated under the Part 440 regulations. For such
sources, coverage under this permit would be available if the discharge composed entirely of stormwater does not
combine with other sources of mine drainage that are not subject to 40 CFR Part 440, as well as meeting other
eligibility criteria contained in Part 1.1 of the permit. Permit applicants bear the initial responsibility for
determining the applicable technology-based standard for such discharges. EPA recommends that permit applicants
contact the relevant NPDES permit issuance authority for assistance to determine the nature and scope of the
''active mining area'' on a mine-by-mine basis, as well as to determine the appropriate permitting mechanism for
authorizing such discharges.
8.G.9. Termination of Permit Coverage
8.G.9.1 Termination of Permit Coverage for Sites Reclaimed After December 17, 1990. A site
or a portion of a site that has been released from applicable state or federal reclamation
requirements after December 17, 1990, is no longer required to maintain coverage
under this permit. If the site or portion of a site reclaimed after December 17, 1990, was
not subject to reclamation requirements, the site or portion of the site is no longer
required to maintain coverage under this permit if the site or portion of the site has been
reclaimed as defined in Part 8.G.7.2.
8.G.9.2 Termination of Permit Coverage for Sites Reclaimed Before December 17, 1990. A site
or portion of a site that was released from applicable state or federal reclamation
requirements before December 17, 1990, or that was otherwise reclaimed before
December 17, 1990, is no longer required to maintain coverage under this permit if the
site or portion of the site has been reclaimed. A site or portion of a site is considered to
have been reclaimed if: (1) stormwater runoff that comes into contact with raw
materials, intermediate byproducts, finished products, and waste products does not have
the potential to cause or contribute to violations of state water quality standards, (2) soil
disturbing activities related to mining at the sites or portion of the site have been
completed, (3) the site or portion of the site has been stabilized to minimize soil
erosion, and (4) as appropriate depending on location, size, and the potential to
contribute pollutants to stormwater discharges, the site or portion of the site has been
revegetated, will be amenable to natural revegetation, or will be left in a condition
consistent with the post-mining land use.
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart H – Sector H – Coal Mines and Coal Mining-Related Facilities.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.H.1 Covered Stormwater Discharges.
The requirements in Subpart H apply to stormwater discharges associated with industrial
activity from Coal Mines and Coal Mining-Related facilities as identified by the SIC Codes
specified under Sector H in Table D-1 of Appendix D.
8.H.2 Limitations on Coverage.
8.H.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) Not covered by this
permit: discharges from pollutant seeps or underground drainage from inactive coal
mines and refuse disposal areas that do not result from precipitation events, and
discharges from floor drains in maintenance buildings and other similar drains in
mining and preparation plant areas.
8.H.2.2 Discharges Subject to Stormwater Effluent Guidelines. (See also Part 1.1.4.4) Not
authorized by this permit: stormwater discharges subject to an existing effluent
limitation guideline at 40 CFR Part 434.
8.H.3 Definitions
The following definitions are not intended to supersede the definitions of active and
inactive mining facilities established by 40 CFR 122.26(b)(14)(iii).
8.H.3.1 Mining operation - Consists of the active and temporarily inactive phases, and the
reclamation phase, but excludes the exploration and construction phases.
8.H.3.2 Exploration phase - Entails exploration and land disturbance activities to determine the
financial viability of a site. The exploration phase is not considered part of “mining
operations.”
8.H.3.3 Construction phase - Includes the building of site access roads and removal of
overburden and waste rock to expose mineable coal. The construction phase is not
considered part of “mining operations.”
8.H.3.4 Active phase - Activities including the extraction, removal or recovery of coal. For
surface mines, this definition does not include any land where grading has returned the
earth to a desired contour and reclamation has begun. This definition is derived from
the definition of “active mining area” found at 40 CFR 434.11(b). The active phase is
considered part of “mining operations.”
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8.H.3.5 Reclamation phase - Activities undertaken, in compliance with applicable mined land
reclamation requirements, following the cessation of the “active phase”, intended to
return the land to an appropriate post-mining land use. The reclamation phase is
considered part of "mining operations."
8.H.3.6 Active coal mining facility - A place where work or other activity related to the
extraction, removal, or recovery of coal is being conducted. For surface mines, this
definition does not include any land where grading has returned the earth to a desired
contour and reclamation has begun. This definition is derived from the definition of
“active mining area” found at 40 CFR 434.11(b).
8.H.3.7 Inactive coal mining facility - A site or portion of a site where coal mining and/or
milling occurred in the past but is not an active facility as defined above, and where the
inactive portion is not covered by an active mining permit issued by the applicable State
or Federal agency. An inactive coal mining facility has an identifiable owner / operator.
Sites where mining claims are being maintained prior to disturbances associated with
the extraction, beneficiation, or processing of mined materials and sites where minimal
activities are undertaken for the sole purpose of maintaining a mining claim are not
considered either active or inactive mining facilities and do not require an NPDES
industrial stormwater permit.
8.H.3.8 Temporarily inactive coal mining facility - A site or portion of a site where coal mining
and/or milling occurred in the past but currently are not being actively undertaken, and
the facility is covered by an active mining permit issued by the applicable State or
Federal agency.
8.H.3.9 Final Stabilization - A site or portion of a site is “finally stabilized” when it has
implemented all applicable Federal and State reclamation requirements.
8.H.4 Technology-Based Effluent Limits for Clearing, Grading, and Excavation Activities.
Clearing, grading, and excavation activities being conducted as part of the exploration
and construction phase of mining activities are covered under this permit.
8.H.4.1 Management Practices for Clearing, Grading, and Excavation Activities.
8.H.4.1.1 Selecting and installing control measures. For all areas affected by clearing,
grading, and excavation activities, you must select, design, install, and
implement control measures that meet applicable Part 2 effluent limits.
8.H.4.1.2 Good Housekeeping. Litter, debris, and chemicals must be prevented from
becoming a pollutant source in stormwater discharges.
8.H.4.1.3 Retention and Detention of Stormwater Runoff. For drainage locations serving
more than one acre, sediment basins and/or temporary sediment traps should
be used. At a minimum, silt fences, vegetative buffer strips, or equivalent
sediment controls are required for all down slope boundaries (and side slope
boundaries as necessary based on individual site conditions) of the
development area unless a sediment basin providing storage for a calculated
volume of runoff from a 2-year, 24-hour storm or 3,600 cubic feet of storage
Stormwater Discharges Associated With Industrial Activity – Sector H 72
General Permit
per acre drained is provided. You are required to remove sediment from
sediment traps or sedimentation ponds when design capacity has been reduced
by 50 percent. Due to high sediment discharges from some Sector H facilities,
permittees may need to implement a combination of structural BMP
approaches to sufficiently decrease discharge of sediment from their facilities.
8.H.4.2 Inspection of Clearing, Grading, and Excavation Activities.
8.H.4.2.1 Inspection Frequency. Inspections must be conducted either at least once
every 7 calendar days, or at least once every 14 calendar days and within 24
hours of the end of a storm event of 0.5 inches or greater. Inspection
frequency may be reduced to at least once every month if the entire site is
temporarily stabilized (pursuant to Part 8.H.4.3.2), if runoff is unlikely due to
winter (e.g., site is covered with snow or ice) or frozen conditions, or
construction is occurring during seasonal dry periods in arid areas and semi-
arid areas.
8.H.4.2.2 Location of Inspections. Inspections must include all areas of the site disturbed
by clearing, grading, and/or excavation activities and areas used for storage of
materials that are exposed to precipitation. Sedimentation and erosion control
measures must be observed to ensure proper operation. Discharge locations
must be inspected to ascertain whether erosion control measures are effective
in preventing significant impacts to waters of the United States, where
accessible. Where discharge locations are inaccessible, nearby downstream
locations must be inspected to the extent that such inspections are practicable.
Locations where vehicles enter or exit the site must be inspected for evidence
of significant off-site sediment tracking.
8.H.4.2.3 Inspection Reports. For each inspection required above, you must complete an
inspection report. At a minimum, the inspection report must include the
information required in Part 4.1.
8.H.4.3 Requirements for Cessation of Clearing, Grading, and Excavation Activities.
8.H.4.3.1 Inspections and Maintenance. Inspections and maintenance of control
measures, including BMPs, associated with clearing, grading, and/or
excavation activities being conducted as part of the exploration and
construction phase of a mining operation must continue until final stabilization
has been achieved on all portions of the disturbed area.
8.H.4.3.2 Temporary Stabilization of Disturbed Areas. Stabilization measures should be
initiated immediately in portions of the site where clearing, grading and/or
excavation activities have temporarily ceased, but in no case more than 14
days after the clearing, grading and/or excavation activities in that portion of
the site have temporarily ceased. In arid, semiarid, and drought-stricken areas,
or in areas subject to snow or freezing conditions, where initiating perennial
vegetative stabilization measures is not possible within 14 days after mining,
exploration, and/or construction activity has temporarily ceased, temporary
vegetative stabilization measures must be initiated as soon as practicable.
Stormwater Discharges Associated With Industrial Activity – Sector H 73
General Permit
Until temporary vegetative stabilization is achieved, interim measures such as
erosion control blankets with an appropriate seed base and tackifiers must be
employed. In areas of the site, where exploration and/or construction has
permanently ceased prior to active mining, temporary stabilization measures
must be implemented to minimize mobilization of sediment or other pollutants
until such time as the active mining phase commences.
8.H.4.3.2 Final Stabilization of Disturbed Areas. Stabilization measures should be
initiated immediately in portions of the site where exploration and/or
construction activities have permanently ceased, but in no case more than 14
days after the exploration and/or construction activity in that portion of the site
has permanently ceased. In arid, semiarid, and drought-stricken areas, or in
areas subject to snow or freezing conditions, or in areas subject to snow or
freezing conditions, where initiating perennial vegetative stabilization
measures is not possible within 14 days after mining, exploration, and/or
construction activity has permanently ceased, temporary vegetative
stabilization measures must be initiated as soon as possible. Until final
stabilization is achieved temporary stabilization measures, such as erosion
control blankets with an appropriate seed base and tackifiers, must be used.
8.H.5 Additional Technology-Based Effluent Limits.
8.H.5.1 Good Housekeeping Measures. (See also Part 2.1.2.2) As part of your good
housekeeping program, consider using sweepers and covered storage, watering haul
roads to minimize dust generation, and conserving vegetation (where possible) to
minimize erosion.
8.H.5.2 Preventive Maintenance. (See also Part 2.1.2.3) Perform inspections or other equivalent
measures of storage tanks and pressure lines of fuels, lubricants, hydraulic fluid, and
slurry to prevent leaks due to deterioration or faulty connections.
8.H.6 Additional SWPPP Requirements.
8.H.6.1 Other Applicable Regulations. Most active coal mining-related areas (SIC Codes 1221-
1241) are subject to sediment and erosion control regulations of the U.S. Office of
Surface Mining (OSM) that enforces the Surface Mining Control and Reclamation Act
(SMCRA). OSM has granted authority to most coal-producing states to implement
SMCRA through State SMCRA regulations. All SMCRA requirements regarding
control of stormwater-related pollutant discharges must be addressed and then
documented with the SWPPP (directly or by reference).
8.H.6.2 Site Map. (See also Part 5.1.2) Document in your SWPPP where any of the following
may be exposed to precipitation or surface runoff: haul and access roads; railroad spurs,
sliding, and internal hauling lines; conveyor belts, chutes, and aerial tramways;
equipment storage and maintenance yards; coal handling buildings and structures; and
inactive mines and related areas; acidic spoil, refuse, or unreclaimed disturbed areas;
and liquid storage tanks containing pollutants such as caustics, hydraulic fluids, and
lubricants.
Stormwater Discharges Associated With Industrial Activity – Sector H 74
General Permit
8.H.6.3 Potential Pollutant Sources. (See also Part 5.1.3) Document in your SWPPP the
following sources and activities that have potential pollutants associated with them:
truck traffic on haul roads and resulting generation of sediment subject to runoff and
dust generation; fuel or other liquid storage; pressure lines containing slurry, hydraulic
fluid, or other potential harmful liquids; and loading or temporary storage of acidic
refuse or spoil.
8.H.7 Additional Inspection Requirements.
8.H.7.1 Inspections of Active Mining-Related Areas. (See also Part 4) Except for areas of the
site subject to clearing, grading, and/or excavation activities conducted as part of the
exploration and construction phase, which are subject to Part 8.H.4.2.1, perform
quarterly inspections of active mining areas covered by this permit, corresponding with
the inspections as performed by SMCRA inspectors, of all mining-related areas
required by SMCRA. Also maintain the records of the SMCRA authority
representative. See Part 8.H.8.1 for inspection requirements for inactive and unstaffed
sties.
8.H.7.2 Sediment and Erosion Control. (See also Part 2.1.2.5) As indicated in Part 8.H.6.1,
SMCRA requirements regarding sediment and erosion control measures must be
complied with for those areas subject to SMCRA authority, including inspection
requirements.
8.H.7.3 Comprehensive Site Inspections. (See also Part 4.3) Your inspection program must
include inspections for pollutants entering the drainage system from activities located
on or near coal mining-related areas. Among the areas to be inspected are haul and
access roads; railroad spurs, sliding, and internal hauling lines; conveyor belts, chutes,
and aerial tramways; equipment storage and maintenance yards; coal handling buildings
and structures; and inactive mines and related areas.
8.H.8 Sector-Specific Benchmarks. (See also Part 6 of the permit.)
Table 8.H-1.
Subsector
(You may be subject to requirements for
more than one sector/subsector)
Parameter
Benchmark
Monitoring
Concentration
Total Aluminum 0.75 mg/L
Total Iron 1.0 mg/L
Subsector H1. Coal Mines and Related Areas
(SIC 1221-1241)
Total Suspended Solids (TSS) 100 mg/L
8.H.8.1 Inactive and Unstaffed Sites – Conditional Exemption from No Exposure Requirement
for Routine Inspections, Quarterly Visual Assessments, and Benchmark Monitoring. As
a Sector H facility, if you are seeking to exercise a waiver from either the quarterly
visual assessment or the benchmark monitoring requirements for inactive and unstaffed
sites (including temporarily inactive sites), you are conditionally exempt from the
requirement to certify that “there are no industrial materials or activities exposed to
Stormwater Discharges Associated With Industrial Activity – Sector H 75
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector H 76
stormwater” in Parts 4.2.3 and 6.2.1.3, respectively. Additionally, if you are seeking to
reduce your required quarterly routine inspection frequency to a once annual
comprehensive inspection, as is allowed under Part 4.1.3, you are also conditionally
exempt from the requirement to certify that “there are no industrial materials or
activities exposed to stormwater.” These conditional exemptions are based on the
following requirements:
If circumstances change and your facility becomes active and/or staffed, this
exception no longer applies and you must immediately begin complying with the
applicable benchmark monitoring requirements as if you were in your first year of
permit coverage, and the quarterly visual assessment requirements; and
EPA retains the authority to revoke this exemption and/or the monitoring waiver
where it is determined that the discharge causes, has a reasonable potential to cause
or contribute to an instream excursion above an applicable water quality standard,
including designated uses.
Subject to the two conditions above, if your facility is inactive and unstaffed, you are
waived from the requirement to conduct quarterly visual assessments and routine
facility inspections. You are not waived from conducting the Part 4.3 comprehensive
site inspection. You are encouraged to inspect your site more frequently where you
have reason to believe that severe weather or natural disasters may have damaged
control measures or increased discharges.
8.H.9 Termination of Permit Coverage
8.H.9.1 Termination of Permit Coverage for Sites Reclaimed After December 17, 1990. A site
or a portion of a site that has been released from applicable state or federal reclamation
requirements after December 17, 1990, is no longer required to maintain coverage
under this permit. If the site or portion of a site reclaimed after December 17, 1990, was
not subject to reclamation requirements, the site or portion of the site is no longer
required to maintain coverage under this permit if the site or portion of the site has been
reclaimed as defined in Part 8.H.7.2.
8.H.9.2 Termination of Permit Coverage for Sites Reclaimed Before December 17, 1990. A site
or portion of a site that was released from applicable state or federal reclamation
requirements before December 17, 1990, or that was otherwise reclaimed before
December 17, 1990, is no longer required to maintain coverage under this permit if the
site or portion of the site has been reclaimed. A site or portion of a site is considered to
have been reclaimed if: (1) stormwater runoff that comes into contact with raw
materials, intermediate byproducts, finished products, and waste products does not have
the potential to cause or contribute to violations of state water quality standards, (2) soil
disturbing activities related to mining at the sites or portion of the site have been
completed, (3) the site or portion of the site has been stabilized to minimize soil
erosion, and (4) as appropriate depending on location, size, and the potential to
contribute pollutants to stormwater discharges, the site or portion of the site has been
revegetated, will be amenable to natural revegetation, or will be left in a condition
consistent with the post-mining land use.
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart I – Sector I – Oil and Gas Extraction.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.I.1 Covered Stormwater Discharges.
The requirements in Subpart I apply to stormwater discharges associated with industrial
activity from Oil and Gas Extraction facilities as identified by the SIC Codes specified under
Sector I in Table D-1 of Appendix D of the permit.
Discharges of stormwater runoff from field activities or operations associated with oil
and gas exploration, production, processing, or treatment operations or transmission facilities are
exempt from NPDES permit coverage unless, in accordance with 40 CFR 122.26(c)(1)(iii), the
facility:
Has had a discharge of stormwater resulting in the discharge of a reportable
quantity for which notification is or was required pursuant to 40 CFR 117.21 or 40
CFR 302.6 at anytime since November 16, 1987; or
Has had a discharge of stormwater resulting in the discharge of a reportable
quantity for which notification is or was required pursuant to 40 CFR 110.6 at any
time since November 16, 1987; or
Contributes to a violation of a water quality standard.
Any stormwater discharges that require permit coverage as a result of meeting one of the
conditions of 122.26(c)(1)(iii) may be covered under this permit unless otherwise required to
obtain coverage under an alternative NPDES general permit or an individual NPDES permit as
specified in Part 1.6.1.
8.I.2 Limitations on Coverage.
8.I.2.1 Stormwater Discharges Subject to Effluent Limitation Guidelines. (See also Part
1.1.4.4) This permit does not authorize stormwater discharges from petroleum drilling
operations that are subject to nationally established effluent limitation guidelines found
at 40 CFR Part 435, respectively.
8.I.2.2 Non-Stormwater Discharges. Discharges of vehicle and equipment washwater,
including tank cleaning operations, are not authorized by this permit. Alternatively,
washwater discharges must be authorized under a separate NPDES permit, or be
discharged to a sanitary sewer in accordance with applicable industrial pretreatment
requirements.
Stormwater Discharges Associated With Industrial Activity – Sector I 77
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector I 78
8.I.3 Additional Technology-Based Effluent Limits.
8.I.3.1 Vegetative Controls. Implement vegetative practices designed to preserve existing
vegetation, where attainable, and revegetate open areas as soon as practicable after
grade drilling. Consider the following (or equivalent measures): temporary or
permanent seeding, mulching, sod stabilization, vegetative buffer strips, and tree
protection practices. Begin implementing appropriate vegetative practices on all
disturbed areas within 14 days following the last activity in that area.
8.I.4 Additional SWPPP Requirements.
8.I.4.1 Drainage Area Site Map. (See also Part 5.1.2) Document in your SWPPP where any of
the following may be exposed to precipitation or surface runoff: Reportable Quantity
(RQ) releases; locations used for the treatment, storage, or disposal of wastes;
processing areas and storage areas; chemical mixing areas; construction and drilling
areas; all areas subject to the effluent guidelines requirements for “No Discharge” in
accordance with 40 CFR 435.32; and the structural controls to achieve compliance with
the “No Discharge” requirements.
8.I.4.2 Potential Pollutant Sources. (See also Part 5.1.3) Also document in your SWPPP the
following sources and activities that have potential pollutants associated with them:
chemical, cement, mud, or gel mixing activities; drilling or mining activities; and
equipment cleaning and rehabilitation activities. In addition, include information about the
reportable quantity (RQ) release that triggered the permit application requirements: the
nature of the release (e.g., spill of oil from a drum storage area), amount of oil or
hazardous substance released, amount of substance recovered, date of the release, cause of
the release (e.g., poor handling techniques and lack of containment in the area), areas
affected by the release (i.e., land and water), procedure to clean up release, actions or
procedures implemented to prevent or improve response to a release, and remaining
potential contamination of stormwater from release (taking into account human health
risks, the control of drinking water intakes, and the designated uses of the receiving water).
8.I.4.3 Erosion and Sedimentation Control. (See also Part 2.1.2.5) Unless covered by the
current Construction General Permit (CGP), the additional documentation requirements
for sediment and erosion controls for well drillings and sand/shale mining areas include
the following:
8.I.4.3.1 Site Description. Also include a description in your SWPPP of the nature of
the exploration activity, estimates of the total area of site and area disturbed
due to exploration activity, an estimate of runoff coefficient of the site, a site
drainage map, including approximate slopes, and the names of all receiving
waters.
8.I.4.3.2 Vegetative Controls. Document vegetative practices used consistent with Part
8.I.3.1 in the SWPPP.
8.I.5 Additional Inspection Requirements.
All erosion and sedimentation control measures must be inspected every 7 days.
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart J – Sector J – Non-Metallic Mineral Mining and Dressing.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.J.1 Covered Stormwater Discharges.
The requirements in Subpart J apply to stormwater discharges associated with industrial
activity from Active and Inactive Non-Metallic Mineral Mining and Dressing facilities as
identified by the SIC Codes specified under Sector J in Table D-1 of Appendix D of the permit.
8.J.1.1 Covered Discharges from Inactive Facilities. All stormwater discharges.
8.J.1.2 Covered Discharges from Active and Temporarily Inactive Facilities. All stormwater
discharges, except for most stormwater discharges subject to the existing effluent
limitation guideline at 40 CFR Part 436. Mine dewatering discharges composed
entirely of stormwater or uncontaminated ground water seepage from: construction
sand and gravel, industrial sand, and crushed stone mining facilities in Regions 1, 2, 3,
6, 9, and 10 are covered by this permit.
8.J.1.3 Covered Discharges from Exploration and Construction of Non-Metallic Mineral
Mining Facilities. All stormwater discharges.
8.J.1.4 Covered Discharges from Sites Undergoing Reclamation. All stormwater discharges.
8.J.2 Limitations on Coverage.
Most stormwater discharges subject to an existing effluent limitation guideline at 40 CFR
Part 436 are not authorized by this permit. The exceptions to this limitation, which are covered
by this permit, are mine dewatering discharges composed entirely of stormwater or
uncontaminated ground water seepage from construction sand and gravel, industrial sand, and
crushed stone mining facilities in Regions 1, 2, 3, 6, 9, and 10.
8.J.3 Definitions.
The following definitions are not intended to supersede the definitions of active and
inactive mining facilities established by 40 CFR 122.26(b)(14)(iii).
8.J.3.1 Mining operations - Consists of the active and temporarily inactive phases, and the
reclamation phase, but excludes the exploration and construction phases.
8.J.3.2 Exploration phase - Entails exploration and land disturbance activities to determine the
financial viability of a site. The exploration phase is not considered part of “mining
operations.”
Stormwater Discharges Associated With Industrial Activity – Sector J 79
General Permit
8.J.3.3 Construction phase - Includes the building of site access roads and removal of
overburden and waste rock to expose mineable minerals. The construction phase is not
considered part of “mining operations”.
8.J.3.4 Active phase - Activities including the extraction, removal or recovery of minerals. For
surface mines, this definition does not include any land where grading has returned the
earth to a desired contour and reclamation has begun. This definition is derived from
the definition of “active mining area” found at 40 CFR 440.132(a). The active phase is
considered part of “mining operations.”
8.J.3.5 Reclamation phase - Activities undertaken, in compliance with applicable mined land
reclamation requirements, following the cessation of the “active phase”, intended to
return the land to an appropriate post-mining land use. The reclamation phase is
considered part of "mining operations".
NOTE: The following definitions are not intended to supersede the definitions of active
and inactive mining facilities established by 40 CFR 122.26(b)(14)(iii).
8.J.3.6 Active Mineral Mining Facility - A place where work or other activity related to the
extraction, removal, or recovery of minerals is being conducted. For surface mines, this
definition does not include any land where grading has returned the earth to a desired
contour and reclamation has begun. This definition is derived from the definition of
“active mining area” found at 40 CFR 440.132(a).
8.J.3.7 Inactive Mineral Mining Facility - A site or portion of a site where mineral mining
and/or milling occurred in the past but is not an active facility as defined above, and
where the inactive portion is not covered by an active mining permit issued by the
applicable State or Federal agency. An inactive mineral mining facility has an
identifiable owner / operator. Sites where mining claims are being maintained prior to
disturbances associated with the extraction, beneficiation, or processing of mined
materials, and sites where minimal activities are undertaken for the sole purpose of
maintaining a mining claim are not considered either active or inactive mining facilities
and do not require an NPDES industrial stormwater permit.
8.J.3.8 Temporarily Inactive Mineral Mining Facility - A site or portion of a site where metal
mining and/or milling occurred in the past but currently are not being actively
undertaken, and the facility is covered by an active mining permit issued by the
applicable State or Federal agency.
8.J.3.9 Final Stabilization - a site or portion of a site is “finally stabilized” when it has
implemented all applicable Federal and State reclamation requirements.
8.J.3.10 Uncontaminated - Free from the presence of pollutants attributable to industrial activity.
8.J.4 Technology-Based Effluent Limits for Clearing, Grading, and Excavation Activities.
Clearing, grading, and excavation activities being conducted as part of the exploration
and construction phase of mining activities are covered under this permit.
8.J.4.1 Management Practices for Clearing, Grading, and Excavation Activities.
Stormwater Discharges Associated With Industrial Activity – Sector J 80
General Permit
8.J.4.1.1 Selecting and installing control measures. For all areas affected by clearing,
grading, and excavation activities, you must select, design, install, and
implement control measures that meet applicable Part 2 effluent limits.
8.J.4.1.2 Good Housekeeping. (See also Part 2.1.2.2) Litter, debris, and chemicals must
be prevented from becoming a pollutant source in stormwater discharges.
8.J.4.1.3 Retention and Detention of Stormwater Runoff. For drainage locations serving
more than one acre, sediment basins and/or temporary sediment traps should
be used. At a minimum, silt fences, vegetative buffer strips, or equivalent
sediment controls are required for all down slope boundaries (and for those
side slope boundaries deemed appropriate as dictated by individual site
conditions) of the development area unless a sediment basin providing storage
for a calculated volume of runoff from a 2-year, 24-hour storm or 3,600 cubic
feet of storage per acre drained is provided.
8.J.4.2 Inspection of Clearing, Grading, and Excavation Activities. (See also Part 4)
8.J.4.2.1 Inspection Frequency. Inspections must be conducted either at least once
every 7 calendar days or at least once every 14 calendar days and within 24
hours of the end of a storm event of 0.5 inches or greater. Inspection
frequency may be reduced to at least once every month if the entire site is
temporarily stabilized (pursuant to Part 8.J.4.3.2), if runoff is unlikely due to
winter conditions (e.g., site is covered with snow, ice, or the ground is frozen),
or construction is occurring during seasonal arid periods in arid areas and
semi-arid areas.
8.J.4.2.2 Location of Inspections. Inspections must include all areas of the site disturbed
by clearing, grading, and/or excavation activities and areas used for storage of
materials that are exposed to precipitation. Sedimentation and erosion control
measures implemented must be observed to ensure proper operation.
Discharge locations must be inspected to ascertain whether erosion control
measures are effective in preventing significant impacts to waters of the
United States, where accessible. Where discharge locations are inaccessible,
nearby downstream locations must be inspected to the extent that such
inspections are practicable. Locations where vehicles enter or exit the site
must be inspected for evidence of significant off-site sediment tracking.
8.J.4.2.3 Inspection Reports. (See also Part 4.1) For each inspection required above,
you must complete an inspection report. At a minimum, the inspection report
must include the information required in Part 4.1.
8.J.4.3 Requirements for Cessation of Clearing, Grading, and Excavation Activities.
8.J.4.3.1 Inspections and Maintenance. Inspections and maintenance of control
measures, including any BMPs, associated with clearing, grading, and/or
excavation activities being conducted as part of the exploration and
construction phase of a mining operation must continue until final stabilization
has been achieved on all portions of the disturbed area or until the
Stormwater Discharges Associated With Industrial Activity – Sector J 81
General Permit
commencement of the active mining phase for those areas that have been
temporarily stabilized as a precursor to mining
8.J.4.3.2 Temporary Stabilization of Disturbed Areas. Stabilization measures should be
initiated immediately in portions of the site where clearing, grading and/or
excavation activities have temporarily ceased, but in no case more than 14
days after the clearing, grading and/or excavation activities in that portion of
the site have temporarily ceased. In arid, semiarid, and drought-stricken areas,
or in areas subject to snow or freezing conditions, where initiating perennial
vegetative stabilization measures is not possible within 14 days after mining,
exploration, and/or construction activity has temporarily ceased, temporary
vegetative stabilization measures must be initiated as soon as practicable.
Until temporary vegetative stabilization is achieved, interim measures such as
erosion control blankets with an appropriate seed base and tackifiers must be
employed. In areas of the site, where exploration and/or construction has
permanently ceased prior to active mining, temporary stabilization measures
must be implemented to minimize mobilization of sediment or other pollutants
until such time as the active mining phase commences.
8.J.4.3.3 Final Stabilization of Disturbed Areas. Stabilization measures should be
initiated immediately in portions of the site where mining, exploration, and/or
construction activities have permanently ceased, but in no case more than 14
days after the exploration and/or construction activity in that portion of the site
has permanently ceased. In arid, semiarid, and drought-stricken areas, or in
areas subject to snow or freezing conditions, where initiating perennial
vegetative stabilization measures is not possible within 14 days after mining,
exploration, and/or construction activity has permanently ceased, final
vegetative stabilization measures must be initiated as soon as possible. Until
final stabilization is achieved temporary stabilization measures, such as
erosion control blankets with an appropriate seed base and tackifiers must be
used.
8.J.5 Additional Technology-Based Effluent Limits.
8.J.5.1 Employee Training. Conduct employee training at least annually at active and
temporarily inactive sites. (See also Part 2.1.2.9)
8.J.5.2 Stormwater Controls. Apart from the control measures you implement to meet your Part
2 effluent limits, where necessary to minimize pollutant discharges, implement the
following control measures at your site. The potential pollutants identified in Part
8.J.5.3 shall determine the priority and appropriateness of the control measures selected.
8.J.5.2.1 Stormwater Diversions: Consider diverting stormwater away from potential
pollutant sources. Following are some control measure options: interceptor or
diversion controls (e.g., dikes, swales, curbs, or berms); pipe slope drains;
subsurface drains; conveyance systems (e.g., channels or gutters, open-top box
culverts, and waterbars; rolling dips and road sloping; roadway surface water
deflector and culverts); or their equivalents.
Stormwater Discharges Associated With Industrial Activity – Sector J 82
General Permit
8.J.5.2.2 Capping: When capping is necessary to minimize pollutant discharges in
stormwater, identify the source being capped and the material used to
construct the cap.
8.J.5.2.3 Treatment: If treatment of stormwater (e.g., chemical or physical systems, oil
and water separators, artificial wetlands) is necessary to protect water quality,
describe the type and location of treatment used. Passive and/or active
treatment of stormwater runoff is encouraged. Treated runoff may be
discharged as a stormwater source regulated under this permit provided the
discharge is not combined with discharges subject to effluent limitation
guidelines for the Mineral Mining and Processing Point Source Category (40
CFR Part 436).
8.J.5.3 Certification of Discharge Testing: (See also Part 5.1.4.4) Test or evaluate all outfalls
covered under this permit for the presence of specific mining-related non-stormwater
discharges such as discharges subject to effluent limitations guidelines (e.g., 40 CFR
Part 436). Alternatively (if applicable), you may keep a certification with your SWPPP.
8.J.6 Additional SWPPP Requirements.
The requirements in Part 8.J.6 are applicable for sites undergoing exploration and
construction, active mineral mining facilities, temporarily inactive mineral mining facilities, and
sites undergoing reclamation. The requirements in Part 8.J.6 are not applicable to inactive
mineral mining facilities.
8.J.6.1 Nature of Industrial Activities. (See also Part 5.1.2) Document in your SWPPP the
mining and associated activities that can potentially affect the stormwater discharges
covered by this permit, including a general description of the location of the site relative
to major transportation routes and communities.
8.J.6.2 Site Map. (See also Part 5.1.2) Document in your SWPPP the locations of the following
(as appropriate): mining or milling site boundaries; access and haul roads; outline of the
drainage areas of each stormwater outfall within the facility with indications of the
types of discharges from the drainage areas; location(s) of all permitted discharges
covered under an individual NPDES permit, outdoor equipment storage, fueling, and
maintenance areas; materials handling areas; outdoor manufacturing, outdoor storage,
and material disposal areas; outdoor chemicals and explosives storage areas;
overburden, materials, soils, or waste storage areas; location of mine drainage
dewatering or other process water; heap leach pads; off-site points of discharge for
mine dewatering and process water; surface waters; boundary of tributary areas that are
subject to effluent limitations guidelines; and location(s) of reclaimed areas.
8.J.6.3 Potential Pollutant Sources. (See also Part 5.1.3) For each area of the mine or mill site
where stormwater discharges associated with industrial activities occur, document in
your SWPPP the types of pollutants (e.g., heavy metals, sediment) likely to be present
in significant amounts. For example, phosphate mining facilities will likely need to
document pollutants such as selenium, which can be present in significant amounts in
their discharges. Consider these factors: the mineralogy of the waste rock (e.g., acid
forming); toxicity and quantity of chemicals used, produced, or discharged; the
Stormwater Discharges Associated With Industrial Activity – Sector J 83
General Permit
likelihood of contact with stormwater; vegetation of site (if any); and history of
significant leaks or spills of toxic or hazardous pollutants. Also include a summary of
any existing waste rock or overburden characterization data and test results for potential
generation of acid rock drainage.
8.J.6.4 Stormwater Controls. To the extent that you use any of the control measures in Part
8.J.5.2, document them in your SWPPP pursuant to Part 5.1.4. If control measures are
implemented or planned but are not listed here (e.g., substituting a less toxic chemical
for a more toxic one), include descriptions of them in your SWPPP.
8.J.6.4 Employee Training. All employee training(s) conducted in accordance with Part 8.J.5.1
must be documented with the SWPPP.
8.J.6.5 Certification of Permit Coverage for Commingled Non-Stormwater Discharges. If you
determine that you are able to certify, consistent with Part 8.J.5.3, that a particular
discharge composed of commingled stormwater and non-stormwater is covered under a
separate NPDES permit, and that permit subjects the non-stormwater portion to effluent
limitations prior to any commingling, you must retain such certification with your
SWPPP. This certification must identify the non-stormwater discharges, the applicable
NPDES permit(s), the effluent limitations placed on the non-stormwater discharge by
the permit(s), and the points at which the limitations are applied.
8.J.7 Additional Inspection Requirements.
Except for areas of the site subject to clearing, grading, and/or excavation activities
conducted as part of the exploration and construction phase, which are subject to Part 8.J.4.2.1,
you must inspect sites at least quarterly unless adverse weather conditions make the site
inaccessible. Sites which discharge to waters which are designated as outstanding waters or
waters which are impaired for sediment or nitrogen must be inspected monthly. See Part 8.J.8.1
for inspection requirements for inactive and unstaffed sites. (See also Part 4.1 and 8.J.4.2.)
8.J.8 Sector-Specific Benchmarks
Table 8.J-1 identifies benchmarks that apply to the specific subsectors of Sector J. These
benchmarks apply to both your primary industrial activity and any co-located industrial
activities, which describe your site activities.
Table 8.J-1.
Subsector
(You may be subject to requirements for more
than one sector/subsector)
Parameter
Benchmark
Monitoring
Concentration
Nitrate plus Nitrite Nitrogen 0.68 mg/L Subsector J1. Sand and Gravel Mining (SIC
1442, 1446)
Total Suspended Solids (TSS) 100 mg/L
Subsector J2. Dimension and Crushed Stone and
Nonmetallic Minerals (except fuels) (SIC 1411,
1422-1429, 1481, 1499)
Total Suspended Solids (TSS) 100 mg/L
Stormwater Discharges Associated With Industrial Activity – Sector J 84
General Permit
8.J.8.1 Inactive and Unstaffed Sites – Conditional Exemption from No Exposure Requirement
for Routine Inspections, Quarterly Visual Assessments, and Benchmark Monitoring. As
a Sector J facility, if you are seeking to exercise a waiver from either the routine
inspection, quarterly visual assessment or the benchmark monitoring requirements for
inactive and unstaffed sites (including temporarily inactive sites), you are conditionally
exempt from the requirement to certify that “there are no industrial materials or
activities exposed to stormwater” in Parts 4.2.3 and 6.2.1.3, respectively. This
exemption is conditioned on the following:
If circumstances change and your facility becomes active and/or staffed, this
exception no longer applies and you must immediately begin complying with the
applicable benchmark monitoring requirements as if you were in your first year of
permit coverage, and the quarterly visual assessment requirements; and
EPA retains the authority to revoke this exemption and/or the monitoring waiver
where it is determined that the discharge causes, has a reasonable potential to cause,
or contributes to an instream excursion above an applicable water quality standard,
including designated uses.
Subject to the two conditions above, if your facility is inactive and unstaffed, you are
waived from the requirement to conduct quarterly visual assessments and routine
facility inspections. You are not waived from conducting the Part 4.3 comprehensive
site inspection. You are encouraged to inspect your site more frequently where you
have reason to believe that severe weather or natural disasters may have damaged
control measures or increased discharges.
8.J.9 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1
of the permit)
Table 8.J-2 identifies effluent limits that apply to the industrial activities described below.
Compliance with these effluent limits is to be determined based on discharges from these
industrial activities independent of commingling with any other wastestreams that may be
covered under this permit.
Table 8.J-2
Industrial Activity Parameter Effluent Limit
1
Mine dewatering discharges at crushed stone mining
facilities (SIC 1422 - 1429)
pH 6.0 - 9.0
Mine dewatering discharges at construction sand and
gravel mining facilities (SIC 1442)
pH 6.0 - 9.0
25 mg/L, monthly avg. Total Suspended
Solids (TSS)
45 mg/L, daily maximum
Mine dewatering discharges at industrial sand mining
facilities (SIC 1446)
pH 6.0 - 9.0
1
Monitor annually.
Stormwater Discharges Associated With Industrial Activity – Sector J 85
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector J 86
8.J.10 Termination of Permit Coverage
8.J.10.1 Termination of Permit Coverage for Sites Reclaimed After December 17, 1990. A site
or a portion of a site that has been released from applicable state or federal reclamation
requirements after December 17, 1990, is no longer required to maintain coverage
under this permit. If the site or portion of a site reclaimed after December 17, 1990, was
not subject to reclamation requirements, the site or portion of the site is no longer
required to maintain coverage under this permit if the site or portion of the site has been
reclaimed as defined in Part 8.J.7.2.
8.J.10.2 Termination of Permit Coverage for Sites Reclaimed Before December 17, 1990. A site
or portion of a site that was released from applicable state or federal reclamation
requirements before December 17, 1990, or that was otherwise reclaimed before
December 17, 1990, is no longer required to maintain coverage under this permit if the
site or portion of the site has been reclaimed. A site or portion of a site is considered to
have been reclaimed if: (1) stormwater runoff that comes into contact with raw
materials, intermediate byproducts, finished products, and waste products does not have
the potential to cause or contribute to violations of state water quality standards, (2) soil
disturbing activities related to mining at the sites or portion of the site have been
completed, (3) the site or portion of the site has been stabilized to minimize soil
erosion, and (4) as appropriate depending on location, size, and the potential to
contribute pollutants to stormwater discharges, the site or portion of the site has been
revegetated, will be amenable to natural revegetation, or will be left in a condition
consistent with the post-mining land use.
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart K – Sector K – Hazardous Waste Treatment, Storage, or Disposal Facilities.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.K.1 Covered Stormwater Discharges.
The requirements in Subpart K apply to stormwater discharges associated with industrial
activity from Hazardous Waste Treatment, Storage, or Disposal facilities (TSDFs) as identified
by the Activity Code specified under Sector K in Table D-1 of Appendix D of the permit.
8.K.2 Industrial Activities Covered by Sector K.
This permit authorizes stormwater discharges associated with industrial activity from
facilities that treat, store, or dispose of hazardous wastes, including those that are operating under
interim status or a permit under subtitle C of RCRA.
Disposal facilities that have been properly closed and capped, and have no significant
materials exposed to stormwater, are considered inactive and do not require permits.
8.K.3 Limitations on Coverage.
8.K.3.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) The following are not
authorized by this permit: leachate, gas collection condensate, drained free liquids,
contaminated ground water, laboratory-derived wastewater, and contact washwater
from washing truck and railcar exteriors and surface areas that have come in direct
contact with solid waste at the landfill facility.
8.K.3.2 Limitations on Coverage for Facilities Providing Commercial TSDF Services. For
facilities located in Region 6 (see Appendix C) coverage is limited to hazardous waste
TSDFs that are self-generating (including occasionally accepting wastes from community
household hazardous waste collection events as public service), handle only residential
wastes, and/or only store hazardous wastes and do not treat or dispose of them. Coverage
under this permit is not available to commercial waste disposal and treatment facilities
located in Region 6 that dispose and treat on a commercial basis any produced hazardous
wastes (i.e., not their own) as a service to commercial or industrial generators.
8.K.4 Definitions.
8.K.4.1 Contaminated stormwater - stormwater that comes into direct contact with landfill
wastes, the waste handling and treatment areas, or landfill wastewater as defined in Part
8.K.4.5. Some specific areas of a landfill that may produce contaminated stormwater
include (but are not limited to) the open face of an active landfill with exposed waste
(no cover added); the areas around wastewater treatment operations; trucks, equipment,
or machinery that has been in direct contact with the waste; and waste dumping areas.
Stormwater Discharges Associated With Industrial Activity – Sector K 87
General Permit
8.K.4.2 Drained free liquids - aqueous wastes drained from waste containers (e.g., drums) prior
to landfilling.
8.K.4.3 Landfill - an area of land or an excavation in which wastes are placed for permanent
disposal, but that is not a land application or land treatment unit, surface impoundment,
underground injection well, waste pile, salt dome formation, salt bed formation,
underground mine, or cave as these terms are defined in 40 CFR 257.2, 258.2, and
260.10.
8.K.4.4 Landfill wastewater - as defined in 40 CFR Part 445 (Landfills Point Source Category),
all wastewater associated with, or produced by, landfilling activities except for sanitary
wastewater, non-contaminated stormwater, contaminated groundwater, and wastewater
from recovery pumping wells. Landfill wastewater includes, but is not limited to,
leachate, gas collection condensate, drained free liquids, laboratory derived wastewater,
contaminated stormwater, and contact washwater from washing truck, equipment, and
railcar exteriors and surface areas that have come in direct contact with solid waste at
the landfill facility.
8.K.4.5 Leachate - liquid that has passed through or emerged from solid waste and contains
soluble, suspended, or miscible materials removed from such waste.
8.K.4.6 Non-contaminated stormwater - stormwater that does not come into direct contact with
landfill wastes, the waste handling and treatment areas, or landfill wastewater as
defined in Part 8.K.4.4. Non-contaminated stormwater includes stormwater that flows
off the cap, cover, intermediate cover, daily cover, and/or final cover of the landfill.
8.K.5 Sector-Specific Benchmarks
Table 8.K-1 identifies benchmarks that apply to the specific subsectors of Sector K.
These benchmarks apply to both your primary industrial activity and any co-located industrial
activities, which describe your site activities.
Stormwater Discharges Associated With Industrial Activity – Sector K 88
General Permit
Table 8.K-1.
Subsector
(You may be subject to requirements
for more than one sector/subsector)
Parameter
Benchmark
Monitoring
Concentration
Ammonia 2.14 mg/L
Total Magnesium 0.064 mg/L
Chemical Oxygen Demand (COD) 120 mg/L
Total Arsenic 0.15 mg/L
Total Cadmium
1
Hardness Dependent
Total Cyanide 0.022 mg/ L
Total Lead
1
Hardness Dependent
Total Mercury 0.0014 mg/ L
Total Selenium 0.005 mg/L
Subsector K1. ALL - Industrial Activity
Code “HZ” (Note: permit coverage
limited in some States). Benchmarks only
applicable to discharges not subject to
effluent limitations in 40 CFR Part 445
Subpart A (see below).
Total Silver
1
Hardness Dependent
1
The benchmark values of some metals are dependent on water hardness. For these parameters, permittees must
determine the hardness of the receiving water (see Appendix J, “Calculating Hardness in Receiving Waters for
Hardness Dependent Metals,” for methodology), in accordance with Part 6.2.1.1, to identify the applicable ‘hardness
range’ for determining their benchmark value applicable to their facility. The ranges occur in 25 mg/L increments.
Hardness Dependent Benchmarks follow in the table below:
Water Hardness Range
Cadmium
(mg/L)
Lead
(mg/L)
Silver
(mg/L)
0-25 mg/L 0.0005 0.014 0.0007
25-50 mg/L 0.0008 0.023 0.0007
50-75 mg/L 0.0013 0.045 0.0017
75-100 mg/L 0.0018 0.069 0.0030
100-125 mg/L 0.0023 0.095 0.0046
125-150 mg/L 0.0029 0.122 0.0065
150-175 mg/L 0.0034 0.151 0.0087
175-200 mg/L 0.0039 0.182 0.0112
200-225 mg/L 0.0045 0.213 0.0138
225-250 mg/L 0.0050 0.246 0.0168
250+ mg/L 0.0053 0.262 0.0183
8.K.6 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1
of the permit.)
Table 8.K-2 identifies effluent limits that apply to the industrial activities described
below. Compliance with these effluent limits is to be determined based on discharges from these
industrial activities independent of commingling with any other wastestreams that may be
covered under this permit.
Stormwater Discharges Associated With Industrial Activity – Sector K 89
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector K 90
Table 8.K-2
1
Industrial Activity Parameter Effluent Limit
220 mg/L, daily maximum Biochemical Oxygen
Demand (BOD
5
)
56 mg/L, monthly avg. maximum
88 mg/L, daily maximum Total Suspended Solids
(TSS)
27 mg/L, monthly avg. maximum
10 mg/L, daily maximum Ammonia
4.9 mg/L, monthly avg. maximum
0.042 mg/L, daily maximum Alpha Terpineol
0.019 mg/L, monthly avg. maximum
0.024 mg/L, daily maximum Aniline
0.015 mg/L, monthly avg. maximum
0.119 mg/L, daily maximum Benzoic Acid
0.073 mg/L, monthly avg. maximum
0.059 mg/L, daily maximum Naphthalene
0.022 mg/L, monthly avg. maximum
0.024 mg/L, daily maximum p-Cresol
0.015 mg/L, monthly avg. maximum
0.048 mg/L, daily maximum Phenol
0.029 mg/L, monthly avg. maximum
0.072 mg/L, daily maximum Pyridine
0.025 mg/L, monthly avg. maximum
1.1 mg/L, daily maximum Total Arsenic
0.54 mg/L, monthly avg. maximum
1.1 mg/L, daily maximum
Discharges from hazardous
waste landfills subject to
effluent limitations in 40
CFR Part 445 Subpart A (see
footnote).
Total Chromium
0.46 mg/L, monthly avg. maximum
0.535 mg/L, daily maximum Total Zinc
0.296 mg/L, monthly avg. maximum
pH Within the range of 6-9 standard pH units (s.u.)
1
Monitor annually. As set forth at 40 CFR Part 445 Subpart A, these numeric limitations apply to contaminated
stormwater discharges from hazardous waste landfills subject to the provisions of RCRA Subtitle C at 40 CFR Parts
264 (Subpart N) and 265 (Subpart N) except for any of the following facilities:
(a) landfills operated in conjunction with other industrial or commercial operations when the landfill receives
only wastes generated by the industrial or commercial operation directly associated with the landfill;
(b) landfills operated in conjunction with other industrial or commercial operations when the landfill receives
wastes generated by the industrial or commercial operation directly associated with the landfill and also
receives other wastes, provided that the other wastes received for disposal are generated by a facility that is
subject to the same provisions in 40 CFR Subchapter N as the industrial or commercial operation or that the
other wastes received are of similar nature to the wastes generated by the industrial or commercial operation;
(c) landfills operated in conjunction with Centralized Waste Treatment (CWT) facilities subject to 40 CFR Part
437, so long as the CWT facility commingles the landfill wastewater with other non-landfill wastewater for
discharge. A landfill directly associated with a CWT facility is subject to this part if the CWT facility
discharges landfill wastewater separately from other CWT wastewater or commingles the wastewater from its
landfill only with wastewater from other landfills; or
(d) landfills operated in conjunction with other industrial or commercial operations when the landfill receives
wastes from public service activities, so long as the company owning the landfill does not receive a fee or
other remuneration for the disposal service.
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart L – Sector L – Landfills, Land Application Sites, and Open Dumps.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.L.1 Covered Stormwater Discharges.
The requirements in Subpart L apply to stormwater discharges associated with industrial
activity from Landfills and Land Application Sites and Open Dumps as identified by the Activity
Code specified under Sector L in Table D-1 of Appendix D of the permit.
8.L.2 Industrial Activities Covered by Sector L.
This permit may authorize stormwater discharges for Sector L facilities associated with
waste disposal at landfills, land application sites, and open dumps that receive or have received
industrial waste, including sites subject to regulation under Subtitle D of RCRA. This permit
does not cover discharges from landfills that receive only municipal wastes.
8.L.3 Limitations on Coverage.
8.L.3.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) The following
discharges are not authorized by this permit: leachate, gas collection condensate,
drained free liquids, contaminated ground water, laboratory wastewater, and contact
washwater from washing truck and railcar exteriors and surface areas that have come in
direct contact with solid waste at the landfill facility.
8.L.4 Definitions.
8.L.4.1 Contaminated stormwater - stormwater that comes into direct contact with landfill
wastes, the waste handling and treatment areas, or landfill wastewater. Some areas of a
landfill that may produce contaminated stormwater include (but are not limited to) the
open face of an active landfill with exposed waste (no cover added); the areas around
wastewater treatment operations; trucks, equipment, or machinery that has been in
direct contact with the waste; and waste dumping areas.
8.L.4.2 Drained free liquids - aqueous wastes drained from waste containers (e.g., drums) prior
to landfilling.
8.L.4.3 Landfill wastewater - as defined in 40 CFR Part 445 (Landfills Point Source Category)
all wastewater associated with, or produced by, landfilling activities except for sanitary
wastewater, non-contaminated stormwater, contaminated groundwater, and wastewater
from recovery pumping wells. Landfill process wastewater includes, but is not limited
to, leachate; gas collection condensate; drained free liquids; laboratory-derived
wastewater; contaminated stormwater; and contact washwater from washing truck,
Stormwater Discharges Associated With Industrial Activity – Sector L 91
General Permit
equipment, and railcar exteriors and surface areas that have come in direct contact with
solid waste at the landfill facility.
8.L.4.4 Leachate - liquid that has passed through or emerged from solid waste and contains
soluble, suspended, or miscible materials removed from such waste.
8.L.4.5 Non-contaminated stormwater - stormwater that does not come into direct contact with
landfill wastes, the waste handling and treatment areas, or landfill wastewater. Non-
contaminated stormwater includes stormwater that flows off the cap, cover,
intermediate cover, daily cover, and/or final cover of the landfill.
8.L.5 Additional Technology-Based Effluent Limits.
8.L.5.1 Preventive Maintenance Program. (See also Part 2.1.2.3) As part of your preventive
maintenance program, maintain the following: all elements of leachate collection and
treatment systems, to prevent commingling of leachate with stormwater; the integrity
and effectiveness of any intermediate or final cover (including repairing the cover as
necessary), to minimize the effects of settlement, sinking, and erosion.
8.L.5.2 Erosion and Sedimentation Control. (See also Part 2.1.2.5) Provide temporary
stabilization (e.g., temporary seeding, mulching, and placing geotextiles on the inactive
portions of stockpiles) for the following: materials stockpiled for daily, intermediate,
and final cover; inactive areas of the landfill or open dump; landfills or open dump
areas that have gotten final covers but where vegetation has yet to establish itself; and
land application sites where waste application has been completed but final vegetation
has not yet been established.
8.L.5.3 Unauthorized Discharge Test Certification. (See also Part 5.1.3.4) The discharge test
and certification must also be conducted for the presence of leachate and vehicle
washwater.
8.L.6 Additional SWPPP Requirements.
8.L.5.1 Drainage Area Site Map. (See also Part 5.1.2) Document in your SWPPP where any of
the following may be exposed to precipitation or surface runoff: active and closed
landfill cells or trenches, active and closed land application areas, locations where open
dumping is occurring or has occurred, locations of any known leachate springs or other
areas where uncontrolled leachate may commingle with runoff, and leachate collection
and handling systems.
8.L.5.2 Summary of Potential Pollutant Sources. (See also Part 5.1.3) Document in your
SWPPP the following sources and activities that have potential pollutants associated
with them: fertilizer, herbicide, and pesticide application; earth and soil moving; waste
hauling and loading or unloading; outdoor storage of significant materials, including
daily, interim, and final cover material stockpiles as well as temporary waste storage
areas; exposure of active and inactive landfill and land application areas; uncontrolled
leachate flows; and failure or leaks from leachate collection and treatment systems.
Stormwater Discharges Associated With Industrial Activity – Sector L 92
General Permit
8.L.7 Additional Inspection Requirements. (See also Part 4)
8.L.7.1 Inspections of Active Sites. Except in arid and semi-arid climates, inspect operating
landfills, open dumps, and land application sites at least once every 7 days. Focus on
areas of landfills that have not yet been finally stabilized; active land application areas,
areas used for storage of material and wastes that are exposed to precipitation,
stabilization, and structural control measures; leachate collection and treatment systems;
and locations where equipment and waste trucks enter and exit the site. Ensure that
sediment and erosion control measures are operating properly. For stabilized sites and
areas where land application has been completed, or where the climate is arid or semi-
arid, conduct inspections at least once every month.
8.L.7.2 Inspections of Inactive Sites. Inspect inactive landfills, open dumps, and land
application sites at least quarterly. Qualified personnel must inspect landfill (or open
dump) stabilization and structural erosion control measures, leachate collection and
treatment systems, and all closed land application areas.
8.L.8 Additional Post-Authorization Documentation Requirements.
8.L.8.1 Recordkeeping and Internal Reporting. Keep records with your SWPPP of the types of
wastes disposed of in each cell or trench of a landfill or open dump. For land
application sites, track the types and quantities of wastes applied in specific areas.
8.L.9 Sector-Specific Benchmarks
Table 8.L-1 identifies benchmarks that apply to the specific subsectors of Sector L.
These benchmarks apply to both your primary industrial activity and any co-located industrial
activities, which describe your site activities.
Table 8.L-1.
Subsector
(You may be subject to requirements for more than one
sector/subsector)
Parameter
Benchmark
Monitoring
Concentration
1
Subsector L1. All Landfill, Land Application Sites and Open
Dumps (Industrial Activity Code “LF”)
Total Suspended
Solids (TSS)
100 mg/L
Subsector L2. All Landfill, Land Application Sites and Open
Dumps, except Municipal Solid Waste Landfill (MSWLF) Areas
Closed in Accordance with 40 CFR 258.60 (Industrial Activity
Code “LF”)
Total Iron 1.0 mg/L
1
Benchmark monitoring required only for discharges not subject to effluent limitations in 40 CFR Part 445 Subpart
B (see Table L-2 above).
Stormwater Discharges Associated With Industrial Activity – Sector L 93
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector L 94
8.L.10. Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1
of the permit.)
Table 8.L-2 identifies effluent limits that apply to the industrial activities described
below. Compliance with these effluent limits is to be determined based on discharges from these
industrial activities independent of commingling with any other wastestreams that may be
covered under this permit.
Table 8.L-2
1
Industrial Activity Parameter Effluent Limit
140 mg/L, daily maximum Biochemical Oxygen Demand
(BOD
5
)
37 mg/L, monthly avg. maximum
88 mg/L, daily maximum Total Suspended Solids (TSS)
27 mg/L, monthly avg. maximum
10 mg/L, daily maximum Ammonia
4.9 mg/L, monthly avg. maximum
0.033 mg/L, daily maximum Alpha Terpineol
0.016 mg/L monthly avg. maximum
Discharges from non-
hazardous waste landfills
subject to effluent limitations
in 40 CFR Part 445 Subpart
B.
0.12 mg/L, daily maximum
Benzoic Acid
0.071 mg/L, monthly avg. maximum
0.025 mg/L, daily maximum p-Cresol
0.014 mg/L, monthly avg. maximum
0.026 mg/L, daily maximum Phenol
0.015 mg/L, monthly avg. maximum
0.20 mg/L, daily maximum Total Zinc
0.11 mg/L, monthly avg. maximum
pH Within the range of 6-9 standard pH
units (s.u.)
1
Monitor annually. As set forth at 40 CFR Part 445 Subpart B, these numeric limitations apply to contaminated
stormwater discharges from MSWLFs that have not been closed in accordance with 40 CFR 258.60, and to
contaminated stormwater discharges from those landfills that are subject to the provisions of 40 CFR Part 257 except
for discharges from any of the following facilities:
(a) landfills operated in conjunction with other industrial or commercial operations, when the landfill receives
only wastes generated by the industrial or commercial operation directly associated with the landfill;
(b) landfills operated in conjunction with other industrial or commercial operations, when the landfill receives
wastes generated by the industrial or commercial operation directly associated with the landfill and also
receives other wastes, provided that the other wastes received for disposal are generated by a facility that is
subject to the same provisions in 40 CFR Subchapter N as the industrial or commercial operation, or that the
other wastes received are of similar nature to the wastes generated by the industrial or commercial operation;
(c) landfills operated in conjunction with CWT facilities subject to 40 CFR Part 437, so long as the CWT facility
commingles the landfill wastewater with other non-landfill wastewater for discharge. A landfill directly
associated with a CWT facility is subject to this part if the CWT facility discharges landfill wastewater
separately from other CWT wastewater or commingles the wastewater from its landfill only with wastewater
from other landfills; or
(d) landfills operated in conjunction with other industrial or commercial operations when the landfill receives
wastes from public service activities, so long as the company owning the landfill does not receive a fee or
other remuneration for the disposal service.
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart M – Sector M – Automobile Salvage Yards.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.M.1 Covered Stormwater Discharges.
The requirements in Subpart M apply to stormwater discharges associated with industrial
activity from Automobile Salvage Yards as identified by the SIC Code specified under Sector M
in Table D-1 of Appendix D of this permit.
8.M.2 Additional Technology-Based Effluent Limits.
8.M.2.1 Spill and Leak Prevention Procedures. (See also Part 2.1.2.4) Drain vehicles intended
to be dismantled of all fluids upon arrival at the site (or as soon thereafter as feasible),
or employ some other equivalent means to prevent spills and leaks.
8.M.2.2 Employee Training. (See also Part 2.1.2.9) If applicable to your facility, address the
following areas (at a minimum) in your employee training program: proper handling
(collection, storage, and disposal) of oil, used mineral spirits, anti-freeze, mercury
switches, and solvents.
8.M.2.3 Management of Runoff. (See also Part 2.1.2.6) Consider the following management
practices: berms or drainage ditches on the property line (to help prevent run-on from
neighboring properties); berms for uncovered outdoor storage of oily parts, engine
blocks, and above-ground liquid storage; installation of detention ponds; and
installation of filtering devices and oil and water separators.
8.M.3 Additional SWPPP Requirements.
8.M.3.1 Drainage Area Site Map. (See also Part 5.1.2) Identify locations used for dismantling,
storage, and maintenance of used motor vehicle parts. Also identify where any of the
following may be exposed to precipitation or surface runoff: dismantling areas, parts
(e.g., engine blocks, tires, hub caps, batteries, hoods, mufflers) storage areas, and liquid
storage tanks and drums for fuel and other fluids.
8.M.3.2 Potential Pollutant Sources. (See also Part 5.1.3) Assess the potential for the following
to contribute pollutants to stormwater discharges: vehicle storage areas, dismantling
areas, parts storage areas (e.g., engine blocks, tires, hub caps, batteries, hoods,
mufflers), and fueling stations.
8.M.4 Additional Inspection Requirements. (See also Part 4.1) Immediately (or as soon
thereafter as feasible) inspect vehicles arriving at the site for leaks. Inspect quarterly for
signs of leakage all equipment containing oily parts, hydraulic fluids, any other types of
fluids, or mercury switches. Also, inspect quarterly for signs of leakage all vessels and
Stormwater Discharges Associated With Industrial Activity – Sector M 95
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector M 96
areas where hazardous materials and general automotive fluids are stored, including, but
not limited to, mercury switches, brake fluid, transmission fluid, radiator water, and
antifreeze.
8.M.5 Sector-Specific Benchmarks. (See also Part 6 of the permit.)
Table 8.M-1.
Subsector
(You may be subject to requirements for
more than one sector/subsector)
Parameter
Benchmark
Monitoring
Concentration
Total Suspended Solids (TSS) 100 mg/L
Total Aluminum 0.75 mg/L
Total Iron 1.0 mg/L
Subsector M1. Automobile Salvage
Yards (SIC 5015)
Total Lead
1
Hardness Dependent
1
The benchmark values of some metals are dependent on water hardness. For these parameters, permittees must
determine the hardness of the receiving water (see Appendix J, “Calculating Hardness in Receiving Waters for
Hardness Dependent Metals,” for methodology), in accordance with Part 6.2.1.1, to identify the applicable
‘hardness range’ for determining their benchmark value applicable to their facility. The ranges occur in 25 mg/L
increments. Hardness Dependent Benchmarks follow in the table below:
Water Hardness Range
Lead
(mg/L)
0-25 mg/L 0.014
25-50 mg/L 0.023
50-75 mg/L 0.045
75-100 mg/L 0.069
100-125 mg/L 0.095
125-150 mg/L 0.122
150-175 mg/L 0.151
175-200 mg/L 0.182
200-225 mg/L 0.213
225-250 mg/L 0.246
250+ mg/L 0.262
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart N – Sector N – Scrap Recycling and Waste Recycling Facilities.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.N.1 Covered Stormwater Discharges.
The requirements in Subpart N apply to stormwater discharges associated with industrial
activity from Scrap Recycling and Waste Recycling facilities as identified by the SIC Code
specified under Sector N in Table D-1 of Appendix D of the permit.
8.N.2 Limitation on Coverage.
Separate permit requirements have been established for recycling facilities that only
receive source-separated recyclable materials primarily from non-industrial and residential
sources (i.e., common consumer products including paper, newspaper, glass, cardboard, plastic
containers, and aluminum and tin cans). This includes recycling facilities commonly referred to
as material recovery facilities (MRF).
8.N.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) Non-stormwater
discharges from turnings containment areas are not covered by this permit (see also Part
8.N.3.2.3). Discharges from containment areas in the absence of a storm event are
prohibited unless covered by a separate NPDES permit.
8.N.3 Additional Technology-Based Effluent Limits.
8.N.3.1 Scrap and Waste Recycling Facilities (Non-Source Separated, Nonliquid Recyclable
Materials). Requirements for facilities that receive, process, and do wholesale
distribution of nonliquid recyclable wastes (e.g., ferrous and nonferrous metals, plastics,
glass, cardboard, and paper). These facilities may receive both nonrecyclable and
recyclable materials. This section is not intended for those facilities that accept
recyclables only from primarily non-industrial and residential sources.
8.N.3.1.1 Inbound Recyclable and Waste Material Control Program. Minimize the
chance of accepting materials that could be significant sources of pollutants by
conducting inspections of inbound recyclables and waste materials. Following
are some control measure options: (a) provide information and education to
suppliers of scrap and recyclable waste materials on draining and properly
disposing of residual fluids (e.g., from vehicles and equipment engines,
radiators and transmissions, oil filled transformers, and individual containers
or drums) and removal of mercury switches from vehicles before delivery to
your facility; (b) establish procedures to minimize the potential of any residual
fluids from coming into contact with precipitation or runoff; (c) establish
procedures for accepting scrap lead-acid batteries (additional requirements for
Stormwater Discharges Associated With Industrial Activity – Sector N 97
General Permit
the handling, storage, and disposal or recycling of batteries are contained in
the scrap lead-acid battery program provisions in Part 8.N.3.2.6); (d) provide
training targeted for those personnel engaged in the inspection and acceptance
of inbound recyclable materials; and (e) establish procedures to ensure that
liquid wastes, including used oil, are stored in materially compatible and non-
leaking containers and are disposed of or recycled in accordance with the
Resource Conservation and Recovery Act (RCRA).
8.N.3.1.2 Scrap and Waste Material Stockpiles and Storage (Outdoor). Minimize
contact of stormwater runoff with stockpiled materials, processed materials,
and nonrecyclable wastes. Following are some control measure options: (a)
permanent or semi-permanent covers; (b) sediment traps, vegetated swales and
strips, catch basin filters, and sand filters to facilitate settling or filtering of
pollutants; (c) dikes, berms, containment trenches, culverts, and surface
grading to divert runoff from storage areas; (d) silt fencing; and (e) oil and
water separators, sumps, and dry absorbents for areas where potential sources
of residual fluids are stockpiled (e.g., automobile engine storage areas).
8.N.3.1.3 Stockpiling of Turnings Exposed to Cutting Fluids (Outdoor Storage).
Minimize contact of surface runoff with residual cutting fluids by: (a) storing
all turnings exposed to cutting fluids under some form of permanent or semi-
permanent cover, or (b) establishing dedicated containment areas for all
turnings that have been exposed to cutting fluids. Any containment areas must
be constructed of concrete, asphalt, or other equivalent types of impermeable
material and include a barrier (e.g., berms, curbing, elevated pads) to prevent
contact with stormwater run-on. Stormwater runoff from these areas can be
discharged, provided that any runoff is first collected and treated by an oil and
water separator or its equivalent. You must regularly maintain the oil and
water separator (or its equivalent) and properly dispose of or recycle collected
residual fluids.
8.N.3.1.4 Scrap and Waste Material Stockpiles and Storage (Covered or Indoor
Storage). Minimize contact of residual liquids and particulate matter from
materials stored indoors or under cover with surface runoff. Following are
some control measure options: (a) good housekeeping measures, including the
use of dry absorbents or wet vacuuming to contain, dispose of, or recycle
residual liquids originating from recyclable containers, or mercury spill kits
for spills from storage of mercury switches; (b) not allowing washwater from
tipping floors or other processing areas to discharge to the storm sewer
system; and (c) disconnecting or sealing off all floor drains connected to the
storm sewer system.
8.N.3.1.5 Scrap and Recyclable Waste Processing Areas. Minimize surface runoff from
coming in contact with scrap processing equipment. Pay attention to
operations that generate visible amounts of particulate residue (e.g.,
shredding) to minimize the contact of accumulated particulate matter and
residual fluids with runoff (i.e., through good housekeeping, preventive
maintenance, etc.). Following are some control measure options: (a) regularly
Stormwater Discharges Associated With Industrial Activity – Sector N 98
General Permit
inspect equipment for spills or leaks and malfunctioning, worn, or corroded
parts or equipment; (b) establish a preventive maintenance program for
processing equipment; (c) use dry-absorbents or other cleanup practices to
collect and dispose of or recycle spilled or leaking fluids or use mercury spill
kits for spills from storage of mercury switches; (d) on unattended hydraulic
reservoirs over 150 gallons in capacity, install protection devices such as low-
level alarms or equivalent devices, or secondary containment that can hold the
entire volume of the reservoir; (e) containment or diversion structures such as
dikes, berms, culverts, trenches, elevated concrete pads, and grading to
minimize contact of stormwater runoff with outdoor processing equipment or
stored materials; (f) oil and water separators or sumps; (g) permanent or semi-
permanent covers in processing areas where there are residual fluids and
grease; (h) retention or detention ponds or basins; sediment traps, and
vegetated swales or strips (for pollutant settling and filtration); (i) catch basin
filters or sand filters.
8.N.3.1.6 Scrap Lead-Acid Battery Program. Properly handle, store, and dispose of
scrap lead-acid batteries. Following are some control measure options (a)
segregate scrap lead-acid batteries from other scrap materials; (b) properly
handle, store, and dispose of cracked or broken batteries; (c) collect and
dispose of leaking lead-acid battery fluid; (d) minimize or eliminate (if
possible) exposure of scrap lead-acid batteries to precipitation or runoff; and
(e) provide employee training for the management of scrap batteries.
8.N.3.1.7 Spill Prevention and Response Procedures. (See also Part 2.1.2.4)Install
alarms and/or pump shutoff systems on outdoor equipment with hydraulic
reservoirs exceeding 150 gallons in the event of a line break. Alternatively, a
secondary containment system capable of holding the entire contents of the
reservoir plus room for precipitation can be used. Use a mercury spill kit for
any release of mercury from switches, anti-lock brake systems, and switch
storage areas.
8.N.3.1.8 Supplier Notification Program. As appropriate, notify major suppliers which
scrap materials will not be accepted at the facility or will be accepted only
under certain conditions.
8.N.3.2 Waste Recycling Facilities (Liquid Recyclable Materials).
8.N.3.2.1 Waste Material Storage (Indoor). Minimize or eliminate contact between
residual liquids from waste materials stored indoors and from surface runoff.
The plan may refer to applicable portions of other existing plans, such as Spill
Prevention, Control, and Countermeasure (SPCC) plans required under 40
CFR Part 112. Following are some control measure options (a) procedures for
material handling (including labeling and marking); (b) clean up spills and
leaks with dry absorbent materials, a wet vacuum system; (c) appropriate
containment structures (trenching, curbing, gutters, etc.); and (d) a drainage
system, including appurtenances (e.g., pumps or ejectors, manually operated
valves), to handle discharges from diked or bermed areas. Drainage should be
Stormwater Discharges Associated With Industrial Activity – Sector N 99
General Permit
discharged to an appropriate treatment facility or sanitary sewer system, or
otherwise disposed of properly. These discharges may require coverage under
a separate NPDES wastewater permit or industrial user permit under the
pretreatment program.
8.N.3.2.2 Waste Material Storage (Outdoor). Minimize contact between stored residual
liquids and precipitation or runoff. The plan may refer to applicable portions
of other existing plans, such as SPCC plans required under 40 CFR Part 112.
Discharges of precipitation from containment areas containing used oil must
also be in accordance with applicable sections of 40 CFR Part 112. Following
are some control measure options (a) appropriate containment structures (e.g.,
dikes, berms, curbing, pits) to store the volume of the largest tank, with
sufficient extra capacity for precipitation; (b) drainage control and other
diversionary structures; (c) corrosion protection and/or leak detection systems
for storage tanks; and (d) dry-absorbent materials or a wet vacuum system to
collect spills.
8.N.3.2.3 Trucks and Rail Car Waste Transfer Areas. Minimize pollutants in discharges
from truck and rail car loading and unloading areas. Include measures to clean
up minor spills and leaks resulting from the transfer of liquid wastes.
Following are two control measure options: (a) containment and diversionary
structures to minimize contact with precipitation or runoff, and (b) dry clean-
up methods, wet vacuuming, roof coverings, or runoff controls.
8.N.3.3 Recycling Facilities (Source-Separated Materials). The following identifies
considerations for facilities that receive only source-separated recyclables,
primarily from non-industrial and residential sources.
8.N.3.3.1 Inbound Recyclable Material Control. Minimize the chance of accepting
nonrecyclables (e.g., hazardous materials) that could be a significant source of
pollutants by conducting inspections of inbound materials. Following are
some control measure options: (a) providing information and education
measures to inform suppliers of recyclables about acceptable and non-
acceptable materials, (b) training drivers responsible for pickup of recycled
material, (c) clearly marking public drop-off containers regarding which
materials can be accepted, (d) rejecting nonrecyclable wastes or household
hazardous wastes at the source, and (e) establishing procedures for handling
and disposal of nonrecyclable material.
8.N.3.3.2 Outdoor Storage. Minimize exposure of recyclables to precipitation and
runoff. Use good housekeeping measures to prevent accumulation of
particulate matter and fluids, particularly in high traffic areas. Following are
some control measure options (a) provide totally enclosed drop-off containers
for the public; (b) install a sump and pump with each container pit and treat or
discharge collected fluids to a sanitary sewer system; (c) provide dikes and
curbs for secondary containment (e.g., around bales of recyclable waste
paper); (d) divert surface water runoff away from outside material storage
areas; (e) provide covers over containment bins, dumpsters, and roll-off boxes;
Stormwater Discharges Associated With Industrial Activity – Sector N 100
General Permit
and (f) store the equivalent of one day’s volume of recyclable material
indoors.
8.N.3.3.3 Indoor Storage and Material Processing. Minimize the release of pollutants
from indoor storage and processing areas. Following are some control measure
options (a) schedule routine good housekeeping measures for all storage and
processing areas, (b) prohibit tipping floor washwater from draining to the
storm sewer system, and (c) provide employee training on pollution
prevention practices.
8.N.3.3.4 Vehicle and Equipment Maintenance. Following are some control measure
options for areas where vehicle and equipment maintenance occur outdoors (a)
prohibit vehicle and equipment washwater from discharging to the storm
sewer system, (b) minimize or eliminate outdoor maintenance areas whenever
possible, (c) establish spill prevention and clean-up procedures in fueling
areas, (d) avoid topping off fuel tanks, (e) divert runoff from fueling areas, (f)
store lubricants and hydraulic fluids indoors, and (g) provide employee
training on proper handling and storage of hydraulic fluids and lubricants.
8.N.4 Additional SWPPP Requirements.
8.N.4.1 Drainage Area Site Map. (See also Part 5.1.2) Document in your SWPPP the locations
of any of the following activities or sources that may be exposed to precipitation or
surface runoff: scrap and waste material storage, outdoor scrap and waste processing
equipment; and containment areas for turnings exposed to cutting fluids.
8.N.4.2 Maintenance Schedules/Procedures for Collection, Handling, and Disposal or
Recycling of Residual Fluids at Scrap and Waste Recycling Facilities. If you are
subject to Part 8.N.3.1.3, your SWPPP must identify any applicable maintenance
schedule and the procedures to collect, handle, and dispose of or recycle residual fluids.
8.N.5 Additional Inspection Requirements.
8.N.5.1 Inspections for Waste Recycling Facilities. The inspections must be performed
quarterly, pursuant to Part 4.1, and include, at a minimum, all areas where waste is
generated, received, stored, treated, or disposed of and that are exposed to either
precipitation or stormwater runoff.
Stormwater Discharges Associated With Industrial Activity – Sector N 101
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector N 102
8.N.6 Sector-Specific Benchmarks. (See also Part 6 of the permit.)
Table 8.N-1.
Subsector
(You may be subject to requirements for
more than one sector/subsector)
Parameter
Benchmark Monitoring
Concentration
Chemical Oxygen Demand
(COD)
120 mg/L
Total Suspended Solids
(TSS)
100 mg/L
Total Recoverable
Aluminum
0.75 mg/L
Total Recoverable Copper
1
Hardness Dependent
Total Recoverable Iron 1.0 mg/L
Total Recoverable Lead
1
Hardness Dependent
Subsector N1. Scrap Recycling and Waste
Recycling Facilities except Source-Separated
Recycling (SIC 5093)
Total Recoverable Zinc
1
Hardness Dependent
1
The benchmark values of some metals are dependent on water hardness. For these parameters, permittees must
determine the hardness of the receiving water (see Appendix J, “Calculating Hardness in Receiving Waters for
Hardness Dependent Metals,” for methodology), in accordance with Part 6.2.1.1, to identify the applicable ‘hardness
range’ for determining their benchmark value applicable to their facility. The ranges occur in 25 mg/L increments.
Hardness Dependent Benchmarks follow in the table below:
Water Hardness Range
Copper
(mg/L)
Lead
(mg/L)
Zinc
(mg/L)
0-25 mg/L 0.0038 0.014 0.04
25-50 mg/L 0.0056 0.023 0.05
50-75 mg/L 0.0090 0.045 0.08
75-100 mg/L 0.0123 0.069 0.11
100-125 mg/L 0.0156 0.095 0.13
125-150 mg/L 0.0189 0.122 0.16
150-175 mg/L 0.0221 0.151 0.18
175-200 mg/L 0.0253 0.182 0.20
200-225 mg/L 0.0285 0.213 0.23
225-250 mg/L 0.0316 0.246 0.25
250+ mg/L 0.0332 0.262 0.26
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart O – Sector O – Steam Electric Generating Facilities.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.O.1 Covered Stormwater Discharges.
The requirements in Subpart O apply to stormwater discharges associated with industrial
activity from Steam Electric Power Generating Facilities as identified by the Activity Code
specified under Sector O in Table D-1 of Appendix D.
8.O.2 Industrial Activities Covered by Sector O.
This permit authorizes stormwater discharges from the following industrial activities at
Sector O facilities:
8.O.2.1 steam electric power generation using coal, natural gas, oil, nuclear energy, etc., to
produce a steam source, including coal handling areas;
8.O.2.2 coal pile runoff, including effluent limitations established by 40 CFR Part 423; and
8.O.2.3 dual fuel facilities that could employ a steam boiler.
8.O.3 Limitations on Coverage.
8.O.3.1 Prohibition of Non-Stormwater Discharges. Non-stormwater discharges subject to
effluent limitations guidelines are not covered by this permit.
8.O.3.2 Prohibition of Stormwater Discharges. Stormwater discharges from the following are
not covered by this permit:
8.O.3.2.1 ancillary facilities (e.g., fleet centers and substations) that are not contiguous
to a stream electric power generating facility;
8.O.3.2.2 gas turbine facilities (providing the facility is not a dual-fuel facility that
includes a steam boiler), and combined-cycle facilities where no supplemental
fuel oil is burned (and the facility is not a dual-fuel facility that includes a
steam boiler); and
8.O.3.2.3 cogeneration (combined heat and power) facilities utilizing a gas turbine.
8.O.4 Additional Technology-Based Effluent Limits. The following good housekeeping
measures are required in addition to Part 2.1.2.2:
8.O.4.1 Fugitive Dust Emissions. Minimize fugitive dust emissions from coal handling areas.
To minimize the tracking of coal dust offsite, consider procedures such as installing
Stormwater Discharges Associated With Industrial Activity – Sector O 103
General Permit
specially designed tires or washing vehicles in a designated area before they leave the
site and controlling the wash water.
8.O.4.2 Delivery Vehicles. Minimize contamination of stormwater runoff from delivery vehicles
arriving at the plant site. Consider procedures to inspect delivery vehicles arriving at the
plant site and ensure overall integrity of the body or container and procedures to deal
with leakage or spillage from vehicles or containers.
8.O.4.3 Fuel Oil Unloading Areas. Minimize contamination of precipitation or surface runoff
from fuel oil unloading areas. Consider using containment curbs in unloading areas,
having personnel familiar with spill prevention and response procedures present during
deliveries to ensure that any leaks or spills are immediately contained and cleaned up,
and using spill and overflow protection devices (e.g., drip pans, drip diapers, or other
containment devices placed beneath fuel oil connectors to contain potential spillage
during deliveries or from leaks at the connectors).
8.O.4.4 Chemical Loading and Unloading. Minimize contamination of precipitation or surface
runoff from chemical loading and unloading areas. Consider using containment curbs at
chemical loading and unloading areas to contain spills, having personnel familiar with
spill prevention and response procedures present during deliveries to ensure that any
leaks or spills are immediately contained and cleaned up, and loading and unloading in
covered areas and storing chemicals indoors.
8.O.4.5 Miscellaneous Loading and Unloading Areas. Minimize contamination of precipitation
or surface runoff from loading and unloading areas. Consider covering the loading area;
grading, berming, or curbing around the loading area to divert run-on; locating the
loading and unloading equipment and vehicles so that leaks are contained in existing
containment and flow diversion systems; or equivalent procedures.
8.O.4.6 Liquid Storage Tanks. Minimize contamination of surface runoff from above-ground
liquid storage tanks. Consider protective guards around tanks, containment curbs, spill
and overflow protection, dry cleanup methods, or equivalent measures.
8.O.4.7 Large Bulk Fuel Storage Tanks. Minimize contamination of surface runoff from large
bulk fuel storage tanks. Consider containment berms (or their equivalent). You must
also comply with applicable State and Federal laws, including Spill Prevention, Control
and Countermeasure (SPCC) Plan requirements.
8.O.4.8 Spill Reduction Measures. Minimize the potential for an oil or chemical spill, or
reference the appropriate part of your SPCC plan. Visually inspect as part of your
routine facility inspection the structural integrity of all above-ground tanks, pipelines,
pumps, and related equipment that may be exposed to stormwater, and make any
necessary repairs immediately.
8.O.4.9 Oil-Bearing Equipment in Switchyards. Minimize contamination of surface runoff from
oil-bearing equipment in switchyard areas. Consider using level grades and gravel surfaces
to retard flows and limit the spread of spills, or collecting runoff in perimeter ditches.
8.O.4.10 Residue-Hauling Vehicles. Inspect all residue-hauling vehicles for proper covering over
the load, adequate gate sealing, and overall integrity of the container body. Repair
Stormwater Discharges Associated With Industrial Activity – Sector O 104
General Permit
vehicles without load covering or adequate gate sealing, or with leaking containers or
beds.
8.O.4.11 Ash Loading Areas. Reduce or control the tracking of ash and residue from ash loading
areas. Clear the ash building floor and immediately adjacent roadways of spillage,
debris, and excess water before departure of each loaded vehicle.
8.O.4.12 Areas Adjacent to Disposal Ponds or Landfills. Minimize contamination of surface
runoff from areas adjacent to disposal ponds or landfills. Reduce ash residue that may
be tracked on to access roads traveled by residue handling vehicles, and reduce ash
residue on exit roads leading into and out of residue handling areas.
8.O.4.13 Landfills, Scrap yards, Surface Impoundments, Open Dumps, General Refuse Sites.
Minimize the potential for contamination of runoff from these areas.
8.O.5 Additional SWPPP Requirements.
8.O.5.1 Drainage Area Site Map. (See also Part 5.1.2) Document in your SWPPP the locations
of any of the following activities or sources that may be exposed to precipitation or
surface runoff: storage tanks, scrap yards, and general refuse areas; short- and long-term
storage of general materials (including but not limited to supplies, construction
materials, paint equipment, oils, fuels, used and unused solvents, cleaning materials,
paint, water treatment chemicals, fertilizer, and pesticides); landfills and construction
sites; and stock pile areas (e.g., coal or limestone piles).
8.O.5.2 Documentation of Good Housekeeping Measures. You must document in your SWPPP
the good housekeeping measures implemented to meet the effluent limits in Part 8.O.4.
8.O.6 Additional Inspection Requirements.
8.O.6.1 Comprehensive Site Compliance Inspection. (See also Part 4.3) As part of your
inspection, inspect the following areas monthly: coal handling areas, loading or
unloading areas, switchyards, fueling areas, bulk storage areas, ash handling areas,
areas adjacent to disposal ponds and landfills, maintenance areas, liquid storage tanks,
and long term and short term material storage areas.
8.O.7 Sector-Specific Benchmarks
Table 8.O-1 identifies benchmarks that apply to the specific subsectors of Sector O.
These benchmarks apply to both your primary industrial activity and any co-located industrial
activities, which describe your site activities.
Table 8.O-1.
Subsector
(You may be subject to requirements for more than one
sector/subsector)
Parameter
Benchmark
Monitoring
Concentration
Subsector O1. Steam Electric Generating Facilities (Industrial
Activity Code “SE”)
Total Iron 1.0 mg/L
Stormwater Discharges Associated With Industrial Activity – Sector O 105
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector O 106
8.O.8 Effluent Limitations Based on Effluent Limitations Guidelines (See also Part 6.2.2.1
of the permit.)
Table 8.O-2 identifies effluent limits that apply to the industrial activities described
below. Compliance with these effluent limits is to be determined based on discharges from these
industrial activities independent of commingling with any other wastestreams that may be
covered under this permit.
Table 8.O-2
1
Industrial Activity Parameter Effluent Limit
TSS 50 mg/l
2
Discharges from coal storage piles at Steam Electric
Generating Facilities
pH 6.0 min - 9.0 max
1
Monitor annually.
2
If your facility is designed, constructed, and operated to treat the volume of coal pile runoff that is associated with
a 10-year, 24-hour rainfall event, any untreated overflow of coal pile runoff from the treatment unit is not subject to
the 50 mg/L limitation for total suspended solids.
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart P – Sector P – Land Transportation and Warehousing.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.P.1 Covered Stormwater Discharges.
The requirements in Subpart P apply to stormwater discharges associated with industrial
activity from Land Transportation and Warehousing facilities as identified by the SIC Codes
specified under Sector P in Table D-1 of Appendix D of the permit.
8.P.2 Limitation on Coverage
8.P.2.1 Prohibited Discharges (see also Parts 1.1.4 and 8.P.3.6) This permit does not authorize
the discharge of vehicle/equipment/surface washwater, including tank cleaning
operations. Such discharges must be authorized under a separate NPDES permit,
discharged to a sanitary sewer in accordance with applicable industrial pretreatment
requirements, or recycled on-site.
8.P.3 Additional Technology-Based Effluent Limits.
8.P.3.1 Good Housekeeping Measures. (See also Part 2.1.2.2) In addition to the Good
Housekeeping requirements in Part 2.1.2.2, you must do the following. Recommended
control measures are discussed as indicated:
8.P.3.1.1 Vehicle and Equipment Storage Areas. Minimize the potential for stormwater
exposure to leaky or leak-prone vehicles/equipment awaiting maintenance.
Consider the following (or other equivalent measures): use of drip pans under
vehicles/equipment, indoor storage of vehicles and equipment, installation of
berms or dikes, use of absorbents, roofing or covering storage areas, and
cleaning pavement surfaces to remove oil and grease.
8.P.3.1.2 Fueling Areas. Minimize contamination of stormwater runoff from fueling
areas. Consider the following (or other equivalent measures): Covering the
fueling area; using spill/overflow protection and cleanup equipment;
minimizing stormwater run-on/runoff to the fueling area; using dry cleanup
methods; and treating and/or recycling collected stormwater runoff.
8.P.3.1.3 Material Storage Areas. Maintain all material storage vessels (e.g., for used
oil/oil filters, spent solvents, paint wastes, hydraulic fluids) to prevent
contamination of stormwater and plainly label them (e.g., “Used Oil,” “Spent
Solvents,” etc.). Consider the following (or other equivalent measures):
storing the materials indoors; installing berms/dikes around the areas;
minimizing runoff of stormwater to the areas; using dry cleanup methods; and
treating and/or recycling collected stormwater runoff.
Stormwater Discharges Associated With Industrial Activity – Sector P 107
General Permit
8.P.3.1.4 Vehicle and Equipment Cleaning Areas. Minimize contamination of
stormwater runoff from all areas used for vehicle/equipment cleaning.
Consider the following (or other equivalent measures): performing all cleaning
operations indoors; covering the cleaning operation, ensuring that all
washwater drains to a proper collection system (i.e., not the stormwater
drainage system); treating and/or recycling collected washwater, or other
equivalent measures.
8.P.3.1.5 Vehicle and Equipment Maintenance Areas. Minimize contamination of
stormwater runoff from all areas used for vehicle/equipment maintenance.
Consider the following (or other equivalent measures): performing
maintenance activities indoors; using drip pans; keeping an organized
inventory of materials used in the shop; draining all parts of fluid prior to
disposal; prohibiting wet clean up practices if these practices would result in
the discharge of pollutants to stormwater drainage systems; using dry cleanup
methods; treating and/or recycling collected stormwater runoff, minimizing
run on/runoff of stormwater to maintenance areas.
8.P.3.1.6 Locomotive Sanding (Loading Sand for Traction) Areas. Consider the
following (or other equivalent measures): covering sanding areas; minimizing
stormwater run on/runoff; or appropriate sediment removal practices to
minimize the offsite transport of sanding material by stormwater.
8.P.3.2 Employee Training. (See also Part 2.1.2.9) Train personnel at least once a year and
address the following activities, as applicable: used oil and spent solvent management;
fueling procedures; general good housekeeping practices; proper painting procedures;
and used battery management.
8.P.4 Additional SWPPP Requirements.
8.P.4.1 Drainage Area Site Map. (See also Part 5.1.2) Identify in the SWPPP the following
areas of the facility and indicate whether activities occurring there may be exposed to
precipitation/surface runoff: Fueling stations; vehicle/equipment maintenance or
cleaning areas; storage areas for vehicle/equipment with actual or potential fluid leaks;
loading/unloading areas; areas where treatment, storage or disposal of wastes occur;
liquid storage tanks; processing areas; and storage areas.
8.P.4.2 Potential Pollutant Sources. (See also Part 5.1.3) Assess the potential for the following
activities and facility areas to contribute pollutants to stormwater discharges: Onsite
waste storage or disposal; dirt/gravel parking areas for vehicles awaiting maintenance;
illicit plumbing connections between shop floor drains and the stormwater conveyance
system(s); and fueling areas. Describe these activities in the SWPPP.
8.P.4.3 Description of Good Housekeeping Measures. You must document in your SWPPP the
good housekeeping measures you implement consistent with Part 8.P.3.
8.P.4.4 Vehicle and Equipment Washwater Requirements. If applicable, attach to or reference in
your SWPPP, a copy of the NPDES permit issued for vehicle/equipment washwater or,
if an NPDES permit has not been issued, a copy of the pending application. If an
Stormwater Discharges Associated With Industrial Activity – Sector P 108
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector P 109
industrial user permit is issued under a local pretreatment program, attach a copy to
your SWPPP. In any case, implement all non-stormwater discharge permit conditions or
pretreatment conditions in your SWPPP. If washwater is handled in another manner
(e.g., hauled offsite), describe the disposal method and attach all pertinent
documentation/information (e.g., frequency, volume, destination, etc.) in the plan.
8.P.5 Additional Inspection Requirements. (See also Part 4.1) Inspect all the following
areas/activities: storage areas for vehicles/equipment awaiting maintenance, fueling
areas, indoor and outdoor vehicle/equipment maintenance areas, material storage areas,
vehicle/equipment cleaning areas and loading/unloading areas.
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart Q – Sector Q – Water Transportation.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.Q.1 Covered Stormwater Discharges.
The requirements in Subpart Q apply to stormwater discharges associated with industrial
activity from Water Transportation facilities as identified by the SIC Codes specified under
Sector Q in Table D-1 of Appendix D of the permit.
8.Q.2 Limitations on Coverage.
8.Q.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) Not covered by this
permit: bilge and ballast water, sanitary wastes, pressure wash water, and cooling water
originating from vessels.
8.Q.3 Additional Technology-Based Effluent Limits.
8.Q.3.1 Good Housekeeping Measures. You must implement the following good housekeeping
measures in addition to the requirements of part 2.1.2.2:
8.Q.3.1.1 Pressure Washing Area. If pressure washing is used to remove marine growth
from vessels, the discharge water must be permitted by a separate NPDES
permit. Collect or contain the discharges from the pressures washing area so
that they are not co-mingled with stormwater discharges authorized by this
permit.
8.Q.3.1.2 Blasting and Painting Area. Minimize the potential for spent abrasives, paint
chips, and overspray to discharge into receiving waters or the storm sewer
systems. Consider containing all blasting and painting activities or use other
measures to minimize the discharge of contaminants (e.g., hanging plastic
barriers or tarpaulins during blasting or painting operations to contain debris).
When necessary, regularly clean stormwater conveyances of deposits of
abrasive blasting debris and paint chips.
8.Q.3.1.3 Material Storage Areas. Store and plainly label all containerized materials
(e.g., fuels, paints, solvents, waste oil, antifreeze, batteries) in a protected,
secure location away from drains. Minimize the contamination of precipitation
or surface runoff from the storage areas. Specify which materials are stored
indoors, and consider containment or enclosure for those stored outdoors. If
abrasive blasting is performed, discuss the storage and disposal of spent
abrasive materials generated at the facility. Consider implementing an
inventory control plan to limit the presence of potentially hazardous materials
onsite.
Stormwater Discharges Associated With Industrial Activity – Sector Q 110
General Permit
8.Q.3.1.4 Engine Maintenance and Repair Areas. Minimize the contamination of
precipitation or surface runoff from all areas used for engine maintenance and
repair. Consider the following (or their equivalents): performing all
maintenance activities indoors, maintaining an organized inventory of
materials used in the shop, draining all parts of fluid prior to disposal,
prohibiting the practice of hosing down the shop floor, using dry cleanup
methods, and treating and/or recycling stormwater runoff collected from the
maintenance area.
8.Q.3.1.5 Material Handling Area. Minimize the contamination of precipitation or
surface runoff from material handling operations and areas (e.g., fueling, paint
and solvent mixing, disposal of process wastewater streams from vessels).
Consider the following (or their equivalents): covering fueling areas, using
spill and overflow protection, mixing paints and solvents in a designated area
(preferably indoors or under a shed), and minimizing runoff of stormwater to
material handling areas.
8.Q.3.1.6 Drydock Activities. Routinely maintain and clean the drydock to minimize
pollutants in stormwater runoff. Address the cleaning of accessible areas of
the drydock prior to flooding, and final cleanup following removal of the
vessel and raising the dock. Include procedures for cleaning up oil, grease, and
fuel spills occurring on the drydock. Consider the following (or their
equivalents): sweeping rather than hosing off debris and spent blasting
material from accessible areas of the drydock prior to flooding and making
absorbent materials and oil containment booms readily available to clean up or
contain any spills.
8.Q.3.2 Employee Training. (See also Part 2.1.2.9) As part of your employee training program,
address, at a minimum, the following activities (as applicable): used oil management,
spent solvent management, disposal of spent abrasives, disposal of vessel wastewaters,
spill prevention and control, fueling procedures, general good housekeeping practices,
painting and blasting procedures, and used battery management.
8.Q.3.3 Preventive Maintenance. (See also Part 2.1.2.3) As part of your preventive maintenance
program, perform timely inspection and maintenance of stormwater management
devices (e.g., cleaning oil and water separators and sediment traps to ensure that spent
abrasives, paint chips, and solids will be intercepted and retained prior to entering the
storm drainage system), as well as inspecting and testing facility equipment and
systems to uncover conditions that could cause breakdowns or failures resulting in
discharges of pollutants to surface waters.
8.Q.4 Additional SWPPP Requirements.
8.Q.4.1 Drainage Area Site Map. (See also Part 5.1.2) Document in your SWPPP where any of
the following may be exposed to precipitation or surface runoff: fueling; engine
maintenance and repair; vessel maintenance and repair; pressure washing; painting;
sanding; blasting; welding; metal fabrication; loading and unloading areas; locations
used for the treatment, storage, or disposal of wastes; liquid storage tanks; liquid
Stormwater Discharges Associated With Industrial Activity – Sector Q 111
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector Q 112
storage areas (e.g., paint, solvents, resins); and material storage areas (e.g., blasting
media, aluminum, steel, scrap iron).
8.Q.4.2 Summary of Potential Pollutant Sources. (See also Part 5.1.3) Document in the SWPPP
the following additional sources and activities that have potential pollutants associated
with them: outdoor manufacturing or processing activities (e.g., welding, metal
fabricating) and significant dust or particulate generating processes (e.g., abrasive
blasting, sanding, and painting.)
8.Q.5 Additional Inspection Requirements.
(See also Part 4.1) Include the following in all quarterly routine facility inspections:
pressure washing area; blasting, sanding, and painting areas; material storage areas; engine
maintenance and repair areas; material handling areas; drydock area; and general yard area.
8.Q.6 Sector-Specific Benchmarks. (See also Part 6 of the permit.)
Table 8.Q-1.
Subsector
(You may be subject to requirements for
more than one sector/subsector)
Parameter
Benchmark Monitoring
Concentration
Total Aluminum 0.75 mg/L
Total Iron 1.0 mg/L
Total Lead
1
Hardness Dependent
Subsector Q1. Water Transportation
Facilities
(SIC 4412-4499)
Total Zinc
1
Hardness Dependent
1
The benchmark values of some metals are dependent on water hardness. For these parameters, permittees must
determine the hardness of the receiving water (see Appendix J, “Calculating Hardness in Receiving Waters for
Hardness Dependent Metals,” for methodology), in accordance with Part 6.2.1.1, to identify the applicable
‘hardness range’ for determining their benchmark value applicable to their facility. The ranges occur in 25 mg/L
increments. Hardness Dependent Benchmarks follow in the table below:
Water Hardness Range
Lead
(mg/L)
Zinc
(mg/L)
0-25 mg/L 0.014 0.04
25-50 mg/L 0.023 0.05
50-75 mg/L 0.045 0.08
75-100 mg/L 0.069 0.11
100-125 mg/L 0.095 0.13
125-150 mg/L 0.122 0.16
150-175 mg/L 0.151 0.18
175-200 mg/L 0.182 0.20
200-225 mg/L 0.213 0.23
225-250 mg/L 0.246 0.25
250+ mg/L 0.262 0.26
General Permit
Part 8 – Sector-Specific Requirements for Industrial Activity
Subpart R – Sector R – Ship and Boat Building and Repair Yards.
You must comply with Part 8 sector-specific requirements associated with your primary
industrial activity and
any co-located industrial activities, as defined in Appendix A. The sector-
specific requirements apply to those areas of your facility where those sector-specific activities
occur. These sector-specific requirements are in addition to any requirements specified
elsewhere in this permit.
8.R.1 Covered Stormwater Discharges.
The requirements in Subpart R apply to stormwater discharges associated with industrial
activity from Ship and Boat Building and Repair Yards as identified by the SIC Codes specified
under Sector R in Table D-1 of Appendix D of the permit.
8.R.2 Limitations on Coverage.
8.R.2.1 Prohibition of Non-Stormwater Discharges. (See also Part 1.1.4) Discharges containing
bilge and ballast water, sanitary wastes, pressure wash water, and cooling water
originating from vessels are not covered by this permit.
8.R.3 Additional Technology-Based Effluent Limits.
8.R.3.1 Good Housekeeping Measures. (See also Part 2.1.2.2)
8.R.3.1.1 Pressure Washing Area. If pressure washing is used to remove marine growth
from vessels, the discharged water must be permitted as a process wastewater
by a separate NPDES permit.
8.R.3.1.2 Blasting and Painting Area. Minimize the potential for spent abrasives, paint
chips, and overspray to discharging into the receiving water or the storm sewer
systems. Consider containing all blasting and painting activities, or use other
measures to prevent the discharge of the contaminants (e.g., hanging plastic
barriers or tarpaulins during blasting or painting operations to contain debris).
When necessary, regularly clean stormwater conveyances of deposits of
abrasive blasting debris and paint chips.
8.R.3.1.3 Material Storage Areas. Store and plainly label all containerized materials
(e.g., fuels, paints, solvents, waste oil, antifreeze, batteries) in a protected,
secure location away from drains. Minimize the contamination of precipitation
or surface runoff from the storage areas. If abrasive blasting is performed,
discuss the storage and disposal of spent abrasive materials generated at the
facility. Consider implementing an inventory control plan to limit the presence
of potentially hazardous materials onsite.
8.R.3.1.4 Engine Maintenance and Repair Areas. Minimize the contamination of
precipitation or surface runoff from all areas used for engine maintenance and
repair. Consider the following (or their equivalents): performing all
maintenance activities indoors, maintaining an organized inventory of
Stormwater Discharges Associated With Industrial Activity – Sector R 113
General Permit
materials used in the shop, draining all parts of fluid prior to disposal,
prohibiting the practice of hosing down the shop floor, using dry cleanup
methods, and treating and/or recycling stormwater runoff collected from the
maintenance area.
8.R.3.1.5 Material Handling Area. Minimize the contamination of precipitation or
surface runoff from material handling operations and areas (e.g., fueling, paint
and solvent mixing, disposal of process wastewater streams from vessels).
Consider the following (or their equivalents): covering fueling areas, using
spill and overflow protection, mixing paints and solvents in a designated area
(preferably indoors or under a shed), and minimizing stormwater run-on to
material handling areas.
8.R.3.1.6 Drydock Activities. Routinely maintain and clean the drydock to minimize
pollutants in stormwater runoff. Clean accessible areas of the drydock prior to
flooding and final cleanup following removal of the vessel and raising the
dock. Include procedures for cleaning up oil, grease, or fuel spills occurring on
the drydock. Consider the following (or their equivalents): sweeping rather
than hosing off debris and spent blasting material from accessible areas of the
drydock prior to flooding, and having absorbent materials and oil containment
booms readily available to clean up and contain any spills.
8.R.3.2 Employee Training. (See also Part 2.1.2.9) As part of your employee training program,
address, at a minimum, the following activities (as applicable): used oil management,
spent solvent management, disposal of spent abrasives, disposal of vessel wastewaters,
spill prevention and control, fueling procedures, general good housekeeping practices,
painting and blasting procedures, and used battery management.
8.R.3.4 Preventive Maintenance. (See also Part 2.1.2.3) As part of your preventive maintenance
program, perform timely inspection and maintenance of stormwater management
devices (e.g., cleaning oil and water separators and sediment traps to ensure that spent
abrasives, paint chips, and solids will be intercepted and retained prior to entering the
storm drainage system), as well as inspecting and testing facility equipment and
systems to uncover conditions that could cause breakdowns or failures resulting in
discharges of pollutants to surface waters.
8.R.4 Additional SWPPP Requirements.
8.R.4.1 Drainage Area Site Map. (See also Part 5.1.2) Document in your SWPPP where any of
the following may be exposed to precipitation or surface runoff: fueling; engine
maintenance or repair; vessel maintenance or repair; pressure washing; painting;
sanding; blasting; welding; metal fabrication; loading and unloading areas; treatment,
storage, and waste disposal areas; liquid storage tanks; liquid storage areas (e.g., paint,
solvents, resins); and material storage areas (e.g., blasting media, aluminum, steel, scrap
iron).
8.R.4.2 Potential Pollutant Sources. (See also Part 5.1.3) Document in your SWPPP the
following additional sources and activities that have potential pollutants associated with
them (if applicable): outdoor manufacturing or processing activities (e.g., welding,
Stormwater Discharges Associated With Industrial Activity – Sector R 114
General Permit
Stormwater Discharges Associated With Industrial Activity – Sector R 115
metal fabricating) and significant dust or particulate generating processes (e.g., abrasive
blasting, sanding, and painting).
8.R.4.3 Documentation of Good Housekeeping Measures. Document in your SWPPP any good
housekeeping measures implemented to meet the effluent limits in Part 8.R.3.
8.R.4.3.1 Blasting and Painting Areas. Document in the SWPPP any standard operating