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G-L Engineering P.C. 8 Brunswick Road Troy, New (City of Renssealaer, NY)

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G-L Engineering P.C.
8 Brunswick Road Troy, New York 12180
Phone: (518) 270-5920 Fax: (518) 270-5922
NEW CASTLE ASPHALT, LLC.
RENSSELAER PLANT CONSTRUCTION PROJECT
City of Rensselaer, Rensselaer County, New York
CONSTRUCTION
STORMWATER POLLUTION PREVENTION PLAN
For Compliance Under SPDES General Permit for Stormwater Discharges from
Construction Activity (GP-0-10-001)
PREPARED BY:
G-L Engineering P.C.
8 Brunswick Road
Troy, New York 12180
Phone: (518) 270-5920
Fax: (518) 270-5922
May 31, 2011
G-L Engineering P.C.
8 Brunswick Road Troy, New York 12180
Phone: (518) 270-5920 Fax: (518) 270-5922
NEW CASTLE ASPHALT, LLC.
RENSSELAER PLANT CONSTRUCTION PROJECT
(A HOT ASPHALT MIXING FACILITY)
City of Rensselaer, Rensselaer County, New York
CONSTRUCTION
STORMWATER POLLUTION PREVENTION PLAN
For Compliance Under SPDES General Permit for Stormwater Discharges from
Construction Activity (GP-0-10-001)
PREPARED BY:
G-L Engineering P.C.
8 Brunswick Road
Troy, New York 12180
Phone: (518) 270-5920
Fax: (518) 270-5922
May 31, 2011
TABLE OF CONTENTS
MANAGEMENT APPROVAL.......................................................................................... 1
1.0 INTRODUCTION ........................................................................................................ 2
1.1 Project Background................................................................................................... 3
1.2 Surface Water Discharges Covered Under the Permit.............................................. 4
1.3 Potential Stormwater Contaminants ......................................................................... 4
1.4 Historic Preservation Information............................................................................. 5
2.0 SOILS ........................................................................................................................... 5
3.0 GENERAL PERMIT REQUIREMENTS .................................................................... 6
3.1 Construction Erosion and Sediment Controls........................................................... 7
3.1.1 Construction Phasing Plan................................................................................. 7
3.1.1.1 Tasks ........................................................................................................... 7
3.1.2 Erosion and Sediment Control Practices.......................................................... 11
3.1.3 Temporary and Permanent Soil Stabilization Plan.......................................... 11
3.1.3.1 Temporary Stormwater Holding Basins ................................................... 11
3.1.3.2 Permanent Soil Stabilization..................................................................... 11
3.1.4 Temporary E&SC Material Specifications and Installation Details................ 12
3.1.5 Pollution Prevention Measures ........................................................................ 12
3.1.6 Discharges Associated w/ Industrial Activity.................................................. 13
3.1.7 Identify Non-Conformance w/ Technical Standard......................................... 13
3.2 Post Construction Stormwater Management Practices........................................... 13
Step 1 - Preserve Natural Features and Reduce Impervious Cover ........................... 15
A.1. Preservation of Undisturbed Areas....................................................................... 15
A.2 Preservation of Buffers ......................................................................................... 15
A.3 Reduce Clearing and Grading............................................................................... 16
A.4 Less Sensitive Areas ............................................................................................. 16
A.5 Open Space Design............................................................................................... 17
A.6 Soil Restoration..................................................................................................... 17
B. Reduction in Impervious Cover................................................................................ 17
B.1 Roadway Reduction.............................................................................................. 17
B.2 Sidewalk Reduction .............................................................................................. 18
B.3 Driveway Reduction ............................................................................................. 18
B.4 Cul-de-Sac Reduction........................................................................................... 18
B.5 Building Footprint Reduction............................................................................... 18
B.6 Parking Area Reduction........................................................................................ 18
Step 2 – Calculate Water Quality Volume.................................................................. 18
Step 3 – Incorporate Green Infrastructure Techniques and Standard SMP’s with
Runoff Reduction Volume (RRv) to eliminate or reduce the total proposed WQv
.......... 19
C.1 Sheetflow to Riparian Buffers and Filter Strips.................................................... 19
C.2 Vegetated Swale.................................................................................................... 19
C.3 Tree Planting/Tree Pit........................................................................................... 20
C.4 Disconnection of Rooftop Runoff......................................................................... 20
C.5 Stream Day-lighting.............................................................................................. 20
C.6 Rain Gardens......................................................................................................... 21
C.7 Green Roofs .......................................................................................................... 21
C.8 Stormwater Planters.............................................................................................. 21
C.9 Rain Barrels and Cisterns...................................................................................... 21
C.10 Porous Pavements................................................................................................. 22
C.11 Stormwater Re-use................................................................................................ 22
C.12 Utilization of Standard SMP’s with Runoff Reduction Capacity......................... 22
C.12.1 Infiltration Practices (90% Reduction of WQv).................................................... 22
C.12.2 Bioretention Practices (80% WQv Reduction - A and B Soils (No underdrain)/40
% WQv Reduction - C and D Soils (With underdrain) .................................................... 23
C.12.3 Dry Swale (40% A and B Soils / 20% C and D Soils)....................................... 23
Step 4 - Use Standard SMP’s to treat the remaining WQv ........................................ 23
Step 5 - Design for Volume and Rate Control Practices............................................ 24
3.2.1 Stormwater Management Structures................................................................ 24
3.2.1.1 Stabilized/Paved Site Entrances................................................................ 24
3.2.1.2 Stabilized Site Access Roadways ............................................................. 24
3.2.1.3 Stormwater Perimeter Berms.................................................................... 24
3.2.1.4 Site Re-Grading Activities........................................................................ 24
3.2.1.5 Stormwater Conveyance Structures.......................................................... 25
3.2.1.6 Sediment Trap........................................................................................... 25
3.2.1.7 Stormwater Sand Filter ............................................................................. 25
3.2.1.8 Stormwater Management Basin................................................................ 26
3.2.2 Permanent Material Specifications and Installation Details............................ 26
3.2.3 Identify Non-Conformance w/ Technical Standard......................................... 26
3.2.4 Summary of Sizing Criteria ............................................................................. 26
3.2.4.1 Stormwater Conveyance Structures.......................................................... 26
3.2.4.2 Sediment Trap........................................................................................... 27
3.2.4.3 Sand Filter................................................................................................. 28
3.2.4.7 Stormwater Detention Basin..................................................................... 28
3.2.4.8 Hydrologic And Hydraulic Analysis For All Structural Components...... 29
4.0 INSPECTION SCHEDULE ....................................................................................... 29
5.0 OPERATIONS AND MAINTENANCE PLAN ........................................................ 32
5.1 Drainage Swale....................................................................................................... 33
5.2 Stormwater Management Basins ............................................................................ 33
Appendices:
A. Notice of Intent
B. Historic Structure Database Search Map
C. MS4 SWPPP Acceptance Form
D. Temporary Materials Specifications & Installation Details
E. Permanent Materials Specifications & Installation Details
F. Stormwater Management Design Calculations
In Pocket:
Site Plan Map (Existing Conditions) dated May 31, 2011
Site Plan Map (Proposed Conditions) dated May 31, 2011
MANAGEMENT APPROVAL
STORMWATER POLLUTION PREVENTION PLAN
For The
Rensselaer Plant Construction Project
New Castle Asphalt, LLC
118 Button Road Waterford, New York 12188
"I certify under penalty of law that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gathered and evaluated the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information
including the possibility of fine and imprisonment for knowing violations."
___________________________
Roderick J. Valente, Managing Partner
New Castle Asphalt, LLC
1
NEW CASTLE ASPHALT, LLC
RENSSELAER PLANT CONSTRUCTION PROJECT
CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN
This Stormwater Pollution Prevention Plan has been prepared for New Castle Asphalt
LLC’s Rensselaer Plant Construction Project. The following report and plans are
prepared as required by the City of Rensselaer City Code Section 145 Article I. As
required, the Stormwater Pollution Prevention Plan has been prepared in accordance with
the New York State Department of Environmental Conservation State Pollutant
Discharge Elimination System General Permit for Stormwater Discharges from
Construction Activity, Permit No. GP-0-10-001, issued pursuant to Article 17, Titles 7, 8
and Article 70 of the Environmental Conservation Law. The General Permit is for a term
beginning January1, 2010 and expires on January 28, 2015.
1.0 INTRODUCTION
The issuance of stormwater discharge permits is part of an effort by the United States
Environmental Protection Agency (EPA) to maintain the Nation’s water quality in
accordance with the Clean Water Act. In New York, the Stormwater Permit Program is
administered through the New York State Department of Environmental Conservation
(NYS DEC). The NYS DEC has delegated implementation of the Construction Activity
Permit Program to the local municipal level through conditions contained within the NYS
DEC Municipal Separate Storm Sewer System (MS4) State Pollutant Discharge
Elimination System Permit (SPDES), in this case the City of Rensselaer. In accordance
with the City of Rensselaer City Code Section 145 Article I, the applicant must comply
with the New York State (NYS) State Pollutant Discharge Elimination System (SPDES)
General Permit for Stormwater Discharges from Construction Activity (CA). New Castle
Asphalt, LLC is required to develop and implement a Stormwater Pollution Prevention
Plan (SWPPP) that is designed to minimize the effects of erosion and sedimentation
caused during land disturbance activities as well as reduce potential stormwater pollution
during the course of construction. Additionally, the SWPPP will address the minimum
required stormwater design standards contained within the NYS DEC Stormwater Design
2
Manual (SDM), dated August 2010. The following report analyzes existing and proposed
hydrologic conditions, discusses construction activities and materials, and evaluates
potential pollutant sources for the New Castle Asphalt’s Rensselaer Plant Construction
Project. The SWPPP will also discuss operation and maintenance procedures and
pollution prevention measures designed specifically to prevent sediments or pollutants
from entering the stormwater conveyance system following the construction period.
1.1 Project Background
The project site is located along the western side of Riverside Avenue just north of the
intersection of Riverside Avenue and the Irwin Stewart Port Expressway, as shown on the
Site Location Map (see next page), in the City of Rensselaer, Rensselaer County. The
site is accessed from Riverside Avenue via the Irwin Stewart Port Expressway from U.S.
Route 20.
In general, the site grades gently from an approximate high elevation of 26 feet above
mean sea level at the top of the bank along the Hudson River down to an elevation of
approximately 18 feet along the active railroad spur on the east side of the property. The
easternmost part of the site grades up slightly to elevation 19 feet towards Riverside
Avenue. The property narrows in its southwestern portion near the 90 degree turn in
Riverside Avenue. This part of the property grades to the steep bank of the Hudson
River.
The proposed project includes site development activities to facilitate the erection and
subsequent operation of a 400-ton per hour rotary counter-flow drum asphalt (blacktop)
mixing facility. The mechanical facilities will include: cold-feed bins, conveyors,
screens, a counter-flow rotary drum, an air emission control system, a liquid asphalt bulk
storage facility, a bulk fuel storage facility (plant and equipment), a plant control room
and an associated employee services/lab building with an on-site septic system. Utilities
necessary for the operation of the hot asphalt mixing plant include: natural gas, electric
and water. Ancillary components of the project include: construction of site access road,
3
construction of a stormwater management system and creation of the stockpile and plant
areas.
1.2 Surface Water Discharges Covered Under the Permit
Requirements under the current permit apply to stormwater discharges associated with
construction of a new hot asphalt (blacktop) mixing facility. The stormwater
management system has been designed to accommodate stormwater discharges expected
from the site during construction activities. The stormwater system has also been
designed to comply with current New York State Standards during the future operation of
the facility. In addition to stormwater discharges, the current SPDES General Permit
allows for the discharge of several incidental sources of surface water during
construction. Of those allowed, it can be expected that surface water discharges from the
following activities may be present during the construction period.
1. Vehicle washing operations, so long as the wash waters contain no detergents;
2. Dust control operations;
3. Building wash waters, so long as the wash waters contain no detergents;
4. Pavement wash waters, so long as the wash waters contain no detergents and
the surface being washed contains no spills or all spills have been
appropriately clean from the surface prior to washing;
5. Ground water and spring water, if they are encountered, so long as the waters
contain no contamination;
6. Construction site de-watering water, so long as the waters contain no
contamination;
7. Foundation & footer drain water, so long as the waters contain no
contamination.
1.3 Potential Stormwater Contaminants
The following potential stormwater contaminants can be associated with construction of
the hot asphalt mixing facility and are capable of impacting stormwater quality during the
construction period: oil, grease, lubricants, coolants and other miscellaneous petroleum-
4
based and non-petroleum-based fluids used in the operation and maintenance of heavy
construction equipment.
Following construction of the hot asphalt mixing facility but prior to subsequent
operation, it will be necessary to obtain a SPDES Multi-Sector General Permit for
Stormwater Discharges Associated with an Industrial Activity. To do so, it will be
necessary to prepare and implement a site specific Stormwater Pollution Prevention Plan
(SWPPP) prepared in accordance with the SPDES Multi-Sector General Permit for
Stormwater Discharges Associated with an Industrial Activity (MSGP). The MSGP
SWPPP will describe all of the potential stormwater contaminants stored or used on-site
and will provide a description of the Best Management Practices proposed to prevent
potential contaminants from entering the stormwater management system.
1.4 Historic Preservation Information
The CA General Permit requires documentation that the proposed construction activity
will not adversely affect any historic structures or properties. A search of the NYS Office
of Parks, Recreation, and Historic Preservation (OPRHP) website database was
performed for the site location. A map showing the results of the database search is
included in Appendix B.
Additionally, a complete Phase B Archeology Study was preformed on the site. The
results of the study can be found in Site Plan Application materials. The study indicates
that no historic structures or properties will be negatively impacted by the construction or
operation of the proposed hot asphalt mixing facility.
2.0 SOILS
The surface soils within the New Castle Asphalt Rensselaer Plant Construction Project
Area are noted on the Site Plan Map (Existing Conditions) included in the Appendix.
The United States Department of Agriculture, Natural Resources Conservation Service,
5
Rensselaer County Soil Survey indicates the following soils exist, or existed prior to
construction, on the property:
Ue – Udorthents - The map unit consists of nearly level areas of material that were
dredged from the Hudson River. In places, the material is deposited in small knolls
or knobs. Slope is mostly 0 to 5 percent. The soils are deep, sandy, and moderately
well drained to excessively well drained. The soils are too variable to have a typical
profile. Texture is mostly loamy sand or sand with varying amounts of gravel.
Gravelly layers are close to the surface in most places. The soils are flooded
occasionally. Bedrock is generally at a depth greater than 10 feet. (Hydrologic Soil
Group A)
Several test pits have been excavated across the site. Initial test pits were conducted to
establish a baseline for the archeology study. Soils encountered during these initial test
pits indicate the site’s soil profile generally can be described as:
0-12” Crushed Stone Parking Lot Area (Underlain by fabric)
12” – 24” Organic to Inorganic Solid Waste Materials
24” – Varies Level to Nearly Level Layered Silt/Clay Materials
Soil test pit results indicate on-site soils are composed of various layered lake silts and
clays. Hydrologic Soils Group C or D (assume D soils).
Additional tests pits will need to be excavated as part of the site investigation work
conducted to design the on-site sanitary wastewater system. Soil profiles will be
documented at the time of the test pits.
3.0 GENERAL PERMIT REQUIREMENTS
The primary requirements of the SPDES General Permit for Stormwater Discharges from
Construction Activity are addressed in the following parts.
6
3.1 Construction Erosion and Sediment Controls
3.1.1 Construction Phasing Plan
The following list of items has been assembled into groups to provide a construction
schedule for completion of the project.
3.1.1.1 Tasks
Task 1 – Place construction/safety fencing along the site perimeter to protect existing
vegetated areas that are to remain after construction as vegetated buffer areas.
Task 2 – Place temporary silt fence along the site perimeter. Initially place silt fence
along the eastern perimeter of the site.
Task 3 – Re-construct existing crushed stone entrance area (eastern) from Riverside
Avenue (approximately 1 acre). Construct a temporary roll-over berm at the top of the
access road ramp. Place temporary construction entrance in location of permanent access
road alignment.
Task 4 – Strip any topsoil from the initial areas of excavation and fill placement
(approximately 0.5 acres). Include the eastern perimeter berm areas and the stormwater
management area. Stockpile topsoil on-site within the perimeter silt fence area.
Task 5 - Excavate soil materials from the area to be used as the stormwater management
ponds (approximately 2 acres). Construct stormwater inlet and outlet structures. The
stormwater management system will be used as temporary stormwater holding basins for
surface waters during construction. The basins will be allowed to temporarily discharge
to the existing surface water drainage corridor for off-site discharge.
Task 6 – Use material excavated from Task 4 above, to construct the perimeter berm
around the eastern perimeter of the stormwater management area.
7
Task 7 – Install perimeter silt fence along the north-eastern perimeter. Complete any
necessary clearing of tree cover.
Task 8 – Strip topsoil along the northern perimeter berm area (approximately 1 acre).
Stockpile topsoil within the perimeter silt fence.
Task 9 - Use material excavated under Task 5 above, to construct the perimeter berm
around the northern site perimeter (approximately 2 acres). The top of the perimeter
berm will be constructed to the elevations shown on the grading plan.
Task 10 – Stabilize outside edge of perimeter berm slopes surrounding the eastern
perimeter. Stabilization shall be accomplished by the placement of four to six inches of
topsoil, seeding, and mulching. A jute erosion control fabric will be used to permanently
stabilize the outer slope of all perimeter berms. Topsoil, seed, mulch and jute erosion
control fabrics will be placed as sections of the eastern perimeter berm are completed.
Task 11 – Place silt fence along the southern perimeter.
Task 12 – Strip any topsoil materials from the southern perimeter berm area
(approximately 0.5 acres).
Task 13 – Stabilize outer slope of northern perimeter berm. Place four to six inches of
topsoil, seed, mulch and jute erosion control fabric.
Task 14 – Following construction of the northern perimeter berm, excavation work in the
plant area will be started (approximately 2 acres). Excavation work will begin along the
eastern perimeter and will proceed in a western direction.
Task 15 – Re-grade eastern perimeter of proposed stockpile area. Stabilize areas at final
elevations using Item 4 or Crushed Stone materials.
8
Task 16 – Soil materials excavated from the plant area, Task 14 above, will be used to
construct the southern perimeter berm and to re-grade the southern portions of the site
(approximately 2 acres). Materials will be placed along the eastern perimeter berm and
fill work shall proceed in a western and southern direction up to the perimeter berm. As
work areas within the site reach final grade, a top surface of Item 4 or crushed stone will
be placed to stabilize the stockpile area.
Task 17 – As re-grading work is completed in the eastern stockpile area, work will be
begin on the excavation and installation of the stormwater outlet system. All pipe work
for the stormwater outlet system will begin at the existing manhole and proceed up the
system to the stormwater detention pond (approximately 1 acre).
Task 18 – In conjunction with the installation of the stormwater outlet system, excavation
and installation of the new natural gas service will begin. All soil materials excavated
during installation of the natural gas service will be stockpiled within the existing
perimeter silt fence.
Task 19 – Stabilize the outer slope of the southern perimeter using four to six inches of
topsoil, seed, mulch and jute erosion control fabric.
Task 20 – Following completion of the southern perimeter berm, a second stabilized
construction entrance will be constructed in the location of the western access road
entrance area (approximately 1 acre). A roll-over curb will be installed at the crest of the
access road alignment.
Task 21 – Place western perimeter silt fence.
Task 22 – Clear existing tree cover along the western site perimeter.
9
Task 23 – Strip topsoil from the western perimeter berm area (approximately 1 acre). As
well, strip any topsoil from below fill areas along the western perimeter road and
stockpile area.
Task 24 – A new electric service and the proposed water service will be constructed
along the western access road alignment. All soil materials excavated from the electric
and water services shall be stockpiled within the existing perimeter silt fence.
Task 25 – Use materials excavated from the plant area to complete re-grading and fill
work along the western perimeter (approximately 2 acres).
Task 26 – Stabilize outer slope of western perimeter berm using four to six inches of
topsoil, seed, mulch and a jute erosion control fabric.
Task 27 –Finish construction of the stormwater management pond systems. Excavate
any soil materials contained within the pond system. Excavate pond system to final
grade shown on grading plan. Stabilize pond system using four to six inches of topsoil,
seed and mulch. Place jute erosion control fabric above waterline of all pond system.
Task 28 – Pave areas of the site that require concrete spill prevention pads.
Task 29 – Erect mechanical equipment for hot asphalt mixing facility. Install any
associated structures such as: fuel tanks, asphalt tanks, additive tanks and any associated
piping.
Task 30 – Complete all on-site paving activities to stabilize roadways.
Task 31 – Construct Lab Building and associated on-site septic system (approximately 1
acre). Stabilize on-site septic system as per Rensselaer County DOH requirements.
Task 32 – Remove any and all temporary erosion and sediment control measures, such as
silt fence.
10
3.1.2 Erosion and Sediment Control Practices
Temporary erosion and sediment control practices required as part of the overall project
have been included within the proposed construction schedule developed within the
preceding section.
3.1.3 Temporary and Permanent Soil Stabilization Plan
The current SPDES General Permit for Stormwater Discharges from Construction
Activity requires that all areas of soil disturbed by construction operations be stabilized
either permanently or temporarily if no further disturbance will be conducted within a
seven (7) day period. The construction schedule proposed for the project limits the
disturbance created by each of the construction tasks to the minimum time period
necessary for completion. The construction schedule outlines the progress of the work
and an approximation of when final stabilization should be completed. Temporary
topsoil, seed, and mulch specifications are included in Appendix D. Temporary measures
will be necessary for the following work tasks:
3.1.3.1 Temporary Stormwater Holding Basins
Temporary stormwater holding basins will be constructed in the location of the final
stormwater holding basins. Construction stormwater management basins will be
developed from the final post-construction stormwater management basins. The sediment
trap and final dry detention basin will be used to treat construction stormwater. In
accordance with the NYS DEC Sediment and Erosion Control Guidelines construction
stormwater control should provide roughly 3,600 cubic feet of storage per disturbed acre.
Given the storage volume of the sediment trap and the dry detention basin below the
primary outlets the construction disturbance should not exceed 4 acres at any one time.
3.1.3.2 Permanent Soil Stabilization
Permanent soil stabilization for the project will be undertaken upon final completion of
each individual work task. The proposed construction schedule outlines the progress of
the work tasks and when final stabilization should be completed. Topsoil, seed, and
11
mulch specifications are included in Appendices E to detail the final stabilization
procedure.
3.1.4 Temporary E&SC Material Specifications and Installation Details
Material specifications and installation details have been developed for each component
of the proposed project. Temporary material specification sheets and installation details
have been included in Appendix D.
3.1.5 Pollution Prevention Measures
During the course of construction the owner/operator and the contractor/subcontractor
will be responsible for the upkeep and maintenance of the construction site. The
construction site will be controlled to prevent incidents where construction operations can
have an impact on receiving waters.
The owner and/or contractor will mitigate waste or litter materials present on the
construction site on a daily basis. Litter and operational solid waste will be kept from
entering any waterway or other water-bearing structure and controlled on site by the
placement and use of on-site dumpsters. Dumpsters will be positioned near the
construction operations and equipped with fully functional covers.
The owner and/or contractors will prevent construction chemicals and materials from
entering any waterway or other water bearing structure. Construction chemicals, if
required during construction, will be handled, stored and used as described within the
manufacturers written instructions. At a minimum, all construction chemicals will be
stored within a covered construction trailer or box container prior to their intended use.
Any spills of construction chemicals during their use will be reported to the on-site
construction manager and/or the site stormwater inspector. Any spills occurring during
construction will be reported to NYSDEC as required and will be cleaned up according to
directions from NYSDEC where applicable. All other spills will be cleaned up according
to the manufacturer's directions.
12
Control of construction debris on the site will be undertaken by the contractor responsible
for generating the construction debris. All construction debris will be properly contained
on site during construction. A specific construction debris container will be provided
during construction. Daily construction operations will include an end of day inspection
for miscellaneous construction debris. All construction debris will be placed into the
proper containers for disposal on a daily basis. All materials will be removed to an
appropriate permitted solid waste disposal facility.
3.1.6 Discharges Associated w/ Industrial Activity
The proposed construction project does not include the temporary use of any industrial
facilities such as temporary concrete mixing facilities or hot asphalt mixing facilities. The
construction project is the development of a hot asphalt mixing facility.
3.1.7 Identify Non-Conformance w/ Technical Standard
There are no known variations from the design standard.
3.2 Post Construction Stormwater Management Practices
In accordance with Table 2 from Appendix B of the SPDES General Permit for
Stormwater Discharges from Construction Activities, the proposed re-development
project, construction of a hot asphalt mixing facility, is required to meet the design
standards contained within the New York State DEC Stormwater Design Manual (SDM).
The NYS SDM, in Chapter 3, provides a 5-step site planning methodology that must be
followed in development of a site-specific SWPPP. The required site planning process is
as follows:
1) Preserve Natural Features and Reduce Impervious Cover, then
2) Calculate Water Quality Volume for Proposed Site, then
3) Incorporate Green Infrastructure Techniques and Standard SMP’s with Runoff
Reduction Volume (RRv) to eliminate or reduce the total proposed WQv, then
4) Use standard SMP’s to treat the remaining WQv, where applicable, then
5) Design for Volume and Rate Control Practices, where applicable.
13
Runoff Reduction, the primary component of the new design process, can be
accomplished by infiltration, ground-water recharge, reuse, recycling or
evaporation/evapotranspiration. This requirement can be accomplished by application of
on-site Green Infrastructure techniques, standard SMP’s with runoff reduction capacity,
and good operation and maintenance. The SWPPP must demonstrate that all Green
Infrastructure planning and design options were evaluated in an attempt to meet the
runoff reduction requirement and must provide documentation if any components of this
approach are not technically feasible. Projects that cannot meet the 100 percent runoff
reduction requirement must provide a justification that evaluates each of the Green
Infrastructure planning and reduction techniques, Chapter 5 of the SDM, and identifies
the specific limitations of the site that make application of the technique technically
infeasible.
Projects that cannot meet the Runoff Reduction criteria, at a minimum, must reduce a
percentage of the Runoff Reduction Volume, for this site approximately 20 to 30 percent
of the WQv. For projects identified as “hotspots”, runoff reduction cannot be provided
by infiltration, unless an enhanced treatment for the pollutant of concern is provided
ahead of the infiltration practice.
There is only one exception to meeting the Runoff Reduction criteria (RRv), that is:
1) the RRv criteria is not required for re-development projects that meet the
application criteria in Section 9.3.1.
In general, re-development project are expected to comply with the technical standards
contained within the NYS DEC SDM. However, under circumstances where one of the
re-development application criteria contained in 9.3.1 are met and the project utilizes the
alternative sizing and selection of stormwater management controls contained within
Chapter 9 of SDM, the SWPPP can be considered in compliance with the SDM.
The re-development criteria contained in Chapter 9 of the SDM are as follows:
14
1) An existing impervious area is disturbed and then reconstructed as either a
pervious or an impervious surface, and
2) There is inadequate space for controlling stormwater runoff from the
reconstructed area, or
3) The physical constraints of the site do not allow meeting the required elements
of the standard practices.
The application criteria are not solely based upon the conditions of the disturbed area. In
determining feasibility of siting SMP’s, the entire site within the property boundaries
must be considered.
The proposed project can be considered a re-development project meeting the re-
development criteria of Chapter 9 Section 9.3.1. The following section describes in detail
the Green Infrastructure techniques evaluated and the technical issues preventing the use
of each.
Step 1 - Preserve Natural Features and Reduce Impervious Cover
A.1. Preservation of Undisturbed Areas
This green infrastructure practice requires the design engineer to delineate and place into
permanent conservation areas undisturbed forested and native vegetated areas, riparian
corridors, wetlands and natural terrain features.
The proposed site layout has taken into consideration all of the above listed site features;
however, the project applicant is not the site owner and does not have the legal property
rights to designate any area of the site as a permanent conservation area. The site layout
chosen attempts to minimize disturbance within any existing forested and vegetated areas
and limits disturbance of any natural terrain features. The drainage basin containing the
site disturbance activities does not include any known wetlands or riparian corridors. A
riparian corridor does exist in the drainage basin adjacent to the site disturbance
activities, that riparian corridor has been isolated from the proposed site disturbance
activities by a soil perimeter berm and will be maintained in an undisturbed condition.
A.2 Preservation of Buffers
This green infrastructure practice requires the design engineer to delineate and place into
permanent conservation areas vegetated buffers along perennial streams, rivers,
shorelines and wetlands.
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The proposed project has been designed to avoid all of the sensitive areas listed. The
drainage basin containing the site disturbance activities does not include any known
wetlands or perennial streams, rivers or shorelines.
The project applicant is a leaseholder on the property and does not have the legal
property rights to place land into permanent conservation areas. Additionally, the local
community has an approved Local Waterfront Revitalization (LWR) Plan for the Hudson
River riverfront area. The LWR plan requires the project sponsor to comply. The LWR
plan calls for the waterfront lands to remain developable for marine-based industrial
activity; thus, making it impracticable to preserve the riverfront areas under a permanent
conservation mechanism.
The property is situated adjacent to the Hudson River; however, the project has been
designed to limit the disturbed area within the drainage basin incident upon the Hudson
River shoreline. As part of the project, a soil perimeter berm will be developed along the
eastern crest of the river bank, isolating the project from the Hudson River corridor.
A.3 Reduce Clearing and Grading
This green infrastructure practice requires the design engineer to limit clearing and site
grading activities to the minimum amount required to develop the proposed facility.
Clearing and grading can be used to construct roadways, driveways, foundations, utilities
and stormwater management facilities.
The proposed clearing and grading activities have been minimized to the greatest extent
possible, while being able to develop the site in a manner consistent with the business
aspirations of the leaseholders. Clearing and grading has been for the most part
contained within the previously developed impervious area.
A.4 Less Sensitive Areas
This green infrastructure practice requires the design engineer to avoid sensitive areas
such as floodplains, steep slopes, erodible soils, wetlands, mature forests and critical
habitats by locating development in areas that will both fit the terrain and create the least
impact from development.
The proposed site layout has taken into account the various sensitive areas located on the
re-development parcel. The proposed site layout avoids any areas of known wetlands,
steep slopes, erodible soils and critical habitat areas. The proposed project does have a
minor impact on the local 100-year flood plain. The proposed project includes a soil
perimeter berm and an access roadway developed at an elevation capable of preventing
the project area from flooding, during a 100-year flood event (approximately elevation
19.5 feet amsl). As proposed a small section of the soil perimeter berm and access
roadway will be constructed within the existing 100-year flood plain. Approximately
1,500 cubic yards of fill material will be placed within the 100-year flood plain along the
eastern perimeter of the site. A small section (roughly 1.25 ac.) of tree-covered area will
be cleared and graded to provide additional space for the industrial activity area and to
provide an undisturbed location for an on-site septic treatment system. Clearing will be
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kept to the minimum amount required to construct the soil perimeter berm and access
roadway, as well as the on-site septic treatment system.
A.5 Open Space Design
This green infrastructure practice requires the design engineer to use cluster design, open
space design or conservation design to reduce impervious cover, preserve open space and
protect water resources.
The site layout has been developed with the above listed design strategies in mind. The
proposed site layout clusters the industrial develop within the central area of the site
leaving the remaining areas of the site undisturbed. The final site layout, as shown on the
project plan, maintains a vegetated green-space buffer surrounding the industrial activity
area that is roughly 53 percent of the property. The undisturbed buffer along the Hudson
River will help to protect water resources as well as preserve open space.
A.6 Soil Restoration
This green infrastructure practice requires the design engineer to restore the original
properties and porosity of soil by deep tilling and amendment with compost to reduce the
generation of stormwater runoff and enhance runoff reduction performance in post-
construction practices.
The proposed project, re-development of an industrial land use, includes a soil perimeter
berm and access roadway around the perimeter of the new industrial land use. All of the
land area within the perimeter berm will be maintained as industrial use. No soil
restoration work will be done within the proposed soil perimeter berm.
There are several locations on the property where past impervious areas will remain
outside the proposed soil perimeter berm and access roadway. These areas are small
sections of an old crushed stone parking area and old access roadways. These areas of
crushed stone will be removed and the crushed stone materials will be used in the site re-
development project. Following removal of the crushed stone materials, soil restoration
activities will be completed prior to returning the areas to pervious grass covered open-
space.
B. Reduction in Impervious Cover
This green infrastructure practice requires the design engineer to evaluate the possibilities
of reducing the impervious cover created by paved travelways. The proposed site re-
development activities are for an industrial land use, only those travelways necessary for
efficient facility operation will be paved. The only additional pavement area is for the
required off-street parking spaces dictated by local building codes.
B.1 Roadway Reduction
The roadway layout is completely controlled by minimum vehicle widths, truck turning
radii and necessary vehicle movements required for efficient facility operation. All of the
roadway widths are designed to accommodate heavy trucks. Only roadways along the
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primary travel path are to be paved. Access roadways to the stockpile area will be
constructed of crushed stone materials.
B.2 Sidewalk Reduction
There are no paved sidewalks proposed as part of the project.
B.3 Driveway Reduction
Other than the paved primary access travelway, the only paved driveways relating to the
project are the bypass driveway leading to the off-street parking area and the pass-
through driveway leading to the petroleum loading/unloading facilities.
B.4 Cul-de-Sac Reduction
There are no paved cul-de-sacs proposed as part of the project.
B.5 Building Footprint Reduction
There is only one building proposed as a part of the project. The building footprint has
been reduced to the minimum size required to suit the project. The only other building
type structures proposed as part of the project are the petroleum storage facilities.
B.6 Parking Area Reduction
Parking requirements for the re-development project are controlled by the local land use
plan. The proposed project must provide parking spaces for a maximum number of
employees across two consecutive work shifts. The total parking space requirements are
twelve (12). The proposed project does provide an additional set of parking spaces, three
(3), near the lab building for daily use by state inspectors and lab personnel. Additionally,
a concrete equipment parking area will be developed, three (3) spaces. The only other
impermeable area will be developed at the petroleum loading/ unloading area.
Step 2 – Calculate Water Quality Volume
Water Quality volume calculations as required by the NYS DEC SDM are contained
within Appendix Section F. The water quality volume calculations have been provided
for the existing condition, the total proposed condition and a split in the two systems to
demonstrate the actual proposed system. Outside of the proposed facility development,
the eastern drainage basin water quality volume is reduced by nearly 80 percent, to
roughly 5,280 cubic feet. Any additional reduction in the WQv outside the limits of the
site will need to be undertaken by the City on City property, land area along Riverside
Avenue at the base of the drainage basin.
Water Quality Volume has been calculated for the area internal to the soil perimeter
berm. The design Water Quality Volume is approximately 18, 610 cubic feet.
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Step 3 – Incorporate Green Infrastructure Techniques and Standard
SMP’s with Runoff Reduction Volume (RRv) to eliminate or
reduce the total proposed WQv
C.1 Sheetflow to Riparian Buffers and Filter Strips
This green infrastructure practice allows the design engineer to direct stormwater to
vegetated filter strips and undisturbed natural areas, such as riparian buffers or natural
depressions for treatment by filtration and infiltration.
Stormwater from within the industrial activity area cannot be discharged to the
surrounding surface areas without a Multi-Sector General Permit. To meet the discharge
conditions of the MSGP, stormwater should not be discharged to the surrounding
filtration and infiltration areas without prior pre-treatment. Therefore, no stormwater flow
will be directed from within the industrial activity area to the surrounding land surfaces,
riparian buffers or grass filter strips.
Stormwater from the outside surface of the soil perimeter containment berm along the
western side of the project area will be directed by sheet flow to the forested riparian
buffer area along the Hudson River. Stormwater flow from the outside surface of the soil
perimeter containment berm along the northern side of the project area will be directed by
sheet flow to a forested buffer area. Stormwater flow from the outside surface of the soil
perimeter containment berm along the southwestern corner of the site will be directed to a
natural vegetated filter area. Stormwater in the southwestern corner will be directed to
the storm drainage system controlled by the City of Rensselaer. Stormwater flow from
the outside surface of the remaining soil perimeter containment berm will be directed by
sheet-flow or shallow flow to the surrounding naturally vegetated areas. Ultimately, most
stormwater from the outside surface of the soil perimeter containment berm will be
directed to the storm drainage system owned by the City of Rensselaer.
C.2 Vegetated Swale
This green infrastructure practice allows the design engineer to direct stormwater to a
vegetated swale with low flow velocity for treatment by filtration and infiltration.
Stormwater from within the industrial activity area cannot be discharged to the
surrounding surface areas without a Multi-Sector General Permit. To meet the discharge
conditions of the MSGP, stormwater should not be discharged to the surrounding
filtration and infiltration areas without prior pre-treatment. Therefore, no stormwater flow
will be directed from within the industrial activity area to the surrounding land surfaces.
Stormwater flow from the outside surface of the perimeter containment berm will be
directed by sheet flow or shallow flow to the surrounding naturally vegetated areas, will
be allowed to pond and infiltrate in topographic depressions and will ultimately discharge
overland to the storm drainage system owned by the City of Rensselaer, when necessary.
There is no appropriate place on-site to utilize a vegetated swale.
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C.3 Tree Planting/Tree Pit
This green infrastructure practice allows the design engineer to conserve existing trees or
plant trees at new or re-development sites to reduce stormwater runoff, promote
evapotranspiration, increase nutrient uptake, provide shading and thermal reductions, and
to encourage wildlife habitat.
Stormwater from within the industrial activity area cannot be discharged to the
surrounding surface areas without a Multi-Sector General Permit. To meet the discharge
conditions of the MSGP, stormwater should not be discharged to the surrounding
filtration and infiltration areas without prior pre-treatment. Therefore, no stormwater flow
will be directed from within the industrial activity area to the surrounding land surfaces.
Several areas outside of the soil perimeter containment berm will be impacted during the
construction phase of the project. It will be necessary to remove some existing tree cover
from the industrial lot to re-develop the site. In total, approximately 54,000 square feet of
tree covered ground surface (new growth) will be cleared. However, there are several
locations where existing tree cover can and will be conserved. The main area of tree
cover (older growth) to be maintained is along the western slope of the property along the
Hudson River. Additionally, the small section of the site located along the southwestern
perimeter will not be disturbed by construction activity, preserving existing tree cover.
Finally, a small section of trees (new growth) along the northeastern perimeter of the site,
approximately 6,500 square feet, will be left undisturbed.
Additionally, there are very limited areas on-site that are currently covered by grass that
can be converted to tree cover by reforestation. The only area is along the southwestern
perimeter near the overlook area. It is approximately 2,400 square feet in size and will be
re-forested during the construction project.
C.4 Disconnection of Rooftop Runoff
This green infrastructure practice allows the design engineer to direct runoff from rooftop
areas to designated pervious areas to reduce runoff volumes and rates. The practice may
only be applied when “filtration/infiltration areas” are incorporated into the site design to
receive runoff from rooftops.
There is a limited amount of rooftop proposed (roughly 675 sq. ft.) as part of the project.
The rooftop is situated within the heavy industrial area. Therefore, rooftop runoff will
not be infiltrated on-site prior to pre-treatment.
C.5 Stream Day-lighting
This green infrastructure practice allows the design engineer to day-light previously
culverted or piped streams or drainageways to restore natural habitat, increase attenuation
by increasing storage size, promote infiltration, and reduce pollutant loads where feasible.
There are no existing culverted drainageways located within the proposed re-
development site. The only culverted drainageway is located adjacent to the site along
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Riverside Avenue. It belongs to the City of Rensselaer. It will be used as the outfall
structure for the proposed stormwater management system.
C.6 Rain Gardens
This green infrastructure practice allows the design engineer to manage and treat small
volumes of stormwater runoff from impervious surfaces using a conditioned soil planting
bed and planting materials to filter runoff stored within a shallow depression. Rain
gardens are passive without an underdrain connected to the storm drain system. The
storage volume of a rain garden is achieved within the gravel drainage layer, the
conditioned soil media and ponding area above the bed. Rain gardens cannot be used to
treat parking lot or roadway runoff. Treatment of these areas and other areas of increased
pollutant loading should incorporate the design elements of a bioretention practice.
All of the impervious areas associated with the proposed project are considered a
stormwater “hotspot”. Hotspot stormwater should not be directed to infiltration practices
without prior pre-treatment. No stormwater will be discharged from the active industrial
activity areas to infiltration practices prior to being pre-treated for the pollutants of
concern, petroleum.
C.7 Green Roofs
This green infrastructure practice allows the design engineer to reducing peak stormwater
flows and attenuate stormwater runoff rates. The green roof system captures rainwater
allowing evaporation or evapotranspiration.
There is a limited amount of rooftop area proposed as part of the project. As well, green
roof systems do not work during the winter months of the year, in cold climates. No
green roof systems will be developed for this seasonal industrial activity.
C.8 Stormwater Planters
This green infrastructure practice allows the design engineer to manage stormwater
within small landscaped stormwater treatment devices which can be designed to infiltrate
or filter stormwater. Three versions of stormwater planters include: contained planters,
infiltration planters and flow-through planters. Stormwater planters are not designed to
treat runoff from roadways or parking lots but are ideal for treating rooftop or courtyard
runoff. Flow through and infiltration planters should not receive drainage from
impervious areas greater than 15,000 square feet.
The majority of the proposed site is paved roadways and parking lots. In addition, the
impervious area approaches 250,000 square feet in size. Therefore, stormwater planters
are not proposed for use within the industrial activity area.
C.9 Rain Barrels and Cisterns
This green infrastructure practice allows the design engineer to capture and store
stormwater runoff to be used later for lawn or landscape irrigation or can be filtered and
used for non-potable water uses. Rain barrels are rooftop scale storage systems typically
used in residential settings while cisterns are large-scale rain barrels used in commercial
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and industrial settings. Rain barrels and cisterns are used to treat rooftop runoff. In cold
climates, cisterns will need to be protected from freezing or taken out of service during
the winter months. Year round use of cisterns in cold climates is not recommended.
A small cistern could be utilized for collection of rooftop stormwater during the operating
season. Stormwater collected from the rooftop area can be used as non-potable water in
the on-site sanitary system. The cistern will need to be de-watered during the winter
months while the site is non-operational and water re-use is very limited.
C.10 Porous Pavements
This green infrastructure practice allows the design engineer to use a broadly defined
group of pervious pavements in roads, parking areas, sidewalks and plaza surfaces.
Permeable pavements are designed to allow rainfall through the surface into an
underlying reservoir where it can infiltrate, reducing stormwater runoff from the site.
Due to the high risk of clogging the pavement voids and underlying soils, permeable
pavement should be limited in their use. Areas with high amounts of sediment-laden
runoff and high traffic volumes are likely causes of system failure. High volume parking
lots, particularly parking drive aisles, high dust areas, and areas with heavy equipment
traffic, are not recommended for this practice. Permeable pavement infiltration areas
should not be used to treat stormwater hotspots, or areas where land use or activities have
the potential to generate highly contaminated runoff.
Due to the use of heavy equipment, high traffic volumes and the generation of sediment
or dust, permeable pavements will not be used on-site. All stormwater from the paved
areas of the site will be directed to the stormwater management system for treatment prior
to discharge.
C.11 Stormwater Re-use
During the proposed site operations, it will be necessary to control the generation of
fugitive dust. In accordance with the dust control plan generated for the site, stormwater
collected in the stormwater treatment system will be available for use as a daily dust
suppressant for the on-site haul roads. Water will be applied to the roadway surfaces, as
needed, to eliminate the generation of fugitive dust. Depending on the time of year,
stormwater re-use may be a significant component of the stormwater management
program. Alternatively, there are times of the year when stormwater re-use will be
minimal or non-existent.
C.12 Utilization of Standard SMP’s with Runoff Reduction Capacity
C.12.1 Infiltration Practices (90% Reduction of WQv)
The standard SMP of infiltration cannot be used with stormwater generated within a
“hotspot” area. Stormwater generated within “hotspot” areas must be pre-treated for the
pollutants of concern prior to being discharged to an infiltration practice. Additionally,
on-site soils are not capable of supporting full-scale infiltration practices (D soils, lake
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clays). Therefore, infiltration practices are not proposed as a part of the on-site
stormwater management system.
C.12.2 Bioretention Practices (80% WQv Reduction - A and B Soils (No
underdrain)/40 % WQv Reduction - C and D Soils (With
underdrain)
The standard SMP of bioretention cannot be used with stormwater generated within
“hotspot” areas. Bioretention practices are primarily an infiltration practice. All non-
hotspot stormwater directed to a bioretention practice must be pre-treated by an open
channel with a level spreader, a gravel diaphragm and a grass filter strip as well as being
treated for any pollutants of concern. The limitations presented by bioretention make the
use of these systems unavailable in the management of stormwater for the proposed
project.
C.12.3 Dry Swale (40% A and B Soils / 20% C and D Soils)
Open channel systems are vegetated drainage channels designed to capture and treat the
WQv within dry and wet cells formed by check dams or other means. Open channels
swales require significant lengths to effectively treat the water quality volume. There is
insufficient room on-site to use open channel systems.
Step 4 - Use Standard SMP’s to treat the remaining WQv
Standard SMP’s will be used to treat the remaining WQv not eliminated through Runoff
Reduction techniques, such as Green Infrastructure or Standard SMP’s with Runoff
Reduction capacity. In accordance with the NYS DEC SDM standard SMP’s include:
Ponds, Wetlands, Infiltration Practices, Filtration and Open Channels. Stormwater from
“hotspot” areas cannot be discharged to infiltration practices without first being treated
for the pollutant of primary concern. Additionally, stormwater from “hotspot” areas
should not be directly discharged to ponds or wetlands that are in direct contact with the
groundwater table. Thus, the remaining WQv not eliminated by Runoff Reduction will
be treated through the use of a standard SMP, Filtration. In accordance with Chapter 9 of
the SDM, re-development projects which meet the re-development criteria must at a
minimum treat 25 percent of the WQv through standard SMP’s.
Use of standard SMP’s is planned for the WQv not addressed as a component of the
Runoff Reduction criteria. Stormwater incident upon the active industrial activity area
will be directed to the stormwater management system by two grass-lined surface
channels. Stormwater will be directed to an isolated sediment trap. From the sediment
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trap’s primary discharge point, a set of inverted culvert pipes, stormwater (the WQv) will
be directed to a surface sand filter prior to discharge from the site.
Step 5 - Design for Volume and Rate Control Practices
Standard SMP’s, a dry detention basin, will be used to control the volume and discharge
rate for storms larger than the WQv storm event. Channel protection, or the 1-year 24-
hour storm event, will be held for the required 24-hour period. The 10-year and 100-year
storms will be discharged to the City of Rensselaer Stormwater Management System at a
rate lower than pre-development conditions.
3.2.1 Stormwater Management Structures
3.2.1.1 Stabilized/Paved Site Entrances
The main entrance and exit for the blacktop manufacturing operation will be permanently
stabilized using asphalt materials for a distance of approximately 200 feet up to the
locking gate providing access control to the site.
3.2.1.2 Stabilized Site Access Roadways
In conjunction with the asphalt pavement stabilized construction entrances, all of the on-
site roadways and vehicle parking areas will be stabilized using a minimum of four
inches of asphalt binder course as a surface pavement.
3.2.1.3 Stormwater Perimeter Berms
Stormwater perimeter berms will be constructed around the perimeter of the site to
provide a means for control of stormwater. The berms will range in height and will be
constructed using the soils excavated from the site. The berms will act to prevent the on-
flow of stormwater to the site as well as collect all stormwater from within the site for
treatment prior to final off-site discharge to the Hudson River.
3.2.1.4 Site Re-Grading Activities
The most extensive re-grading operations at the site will be focused along the plant and
stockpile area. Along the northern perimeter, soils will be excavated to create a level
space for the erection of the blacktop manufacturing plant. South of the plant area and
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adjacent to the stormwater management pond, the stockpile area shall be re-graded to
create an outdoor storage area with a minimum two percent grade.
3.2.1.5 Stormwater Conveyance Structures
Two stormwater conveyance structures will be developed along the western perimeter of
the stormwater management area. A shallow stone-lined, trapezoidal drainage channel
will be located along the southern perimeter of the stormwater management area adjacent
to the stockpile area. This structure will collect stormwater from the stockpile area and
direct it toward the west to the sediment trap. In addition, a stone-lined, trapezoidal
drainage swale will be located along the northern perimeter of the stormwater
management area and will collect stormwater from the partially-paved blacktop plant
area and direct it toward the sediment trap.
3.2.1.6 Sediment Trap
A small sediment trap (40’ x 90’) will be constructed along the northern side of the
stormwater management area. The sediment trap is located between the unpaved
stockpile area, the partially-paved blacktop plant area and the stormwater management
system. Stormwater incident upon the site will be routed by overland flow to the
drainage channels which discharge to the sedimentation trap. The sediment trap will
discharge smaller storm events to a passive surface sand filter. Excess stormwater above
the capacity of the sedimentation trap and the surface sand filter will be directed by
overflow outlets to the stormwater management pond.
3.2.1.7 Stormwater Sand Filter
A passive sand filter will be constructed along the eastern perimeter of the stormwater
management area. The sand filter will be the primary treatment mechanism for WQv
storm events. WQv storm events will be directed to the sand filter from the sediment trap
by a controlled outlet system. The 2,495 square foot surface sand filter will discharge
treated stormwater to the surrounding stormwater culvert system. Excess stormwater
above the capacity of the surface sand filter will be directed by an overflow outlet to the
dry detention basin for volume and rate control prior to discharge.
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3.2.1.8 Stormwater Management Basin
The stormwater management basin will be constructed to meet the acceptable design
standards contained within the NYS Stormwater Design Manual. The 13,236 square foot
basin will be the terminus for all excess stormwater collected and treated on-site. The
basin has been designed to include outlets capable of controlling stormwater from the site
under various design storms. All inlet and outlet features will be constructed with stone-
lined entrance/exit channels. Discharge from the stormwater management basin will be
directed to the existing stormwater drainage system for discharge off-site to the Hudson
River. Discharge from the basin structure will be controlled at the outlet by construction
of a low-level outlet, as well as an overflow outlet.
3.2.2 Permanent Material Specifications and Installation Details
Material specifications and installation details have been developed for each component
of the proposed project. Permanent material specification sheets and installation details
have been included in Appendix E.
3.2.3 Identify Non-Conformance w/ Technical Standard
There are no know locations where the proposed post-construction stormwater
management system will not meet the design criteria establish within the New York State
Department of Environmental Conservation’s Stormwater Design Manual for re-
development projects.
3.2.4 Summary of Sizing Criteria
3.2.4.1 Stormwater Conveyance Structures
Two trapezoidal stone-lined drainage channels will be constructed to convey stormwaters
from their sub-catchment areas to the stormwater treatment devices. The first will be
located along the southern side of the stormwater management area and will capture and
convey surface waters after they flow across or are incident upon the unpaved outdoor
storage area (stockpile area). The stone-lined conveyance structure will be a 1.5-foot
deep trapezoidal channel with 3:1 side slopes and a five-foot bottom width. Design
parameters are obtained from the Grassed Waterway Detail contained within the NYS
Standards and Specification for Sediment and Erosion Control. In accordance with these
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standards, a stone-lined channel shall be designed using the 10-year 24-hour storm event.
Stormwater routing was conducted using TR20 modeling developed by Hydrocad.
Results from the modeling suggest that the channel during the design event will
adequately handle a capacity of 52 cfs, which is well above the capacity required of
approximately 35 cfs. Modeling results, however, determine that the channel would flow
with a velocity of approximately 3.6 fps. Using the chart of Permissible Velocities for
Selected Seed Mixtures contained within the NYS Standards and Specification for
Sediment and Erosion Control (Page 3.25), any seed mixture should adequately handle
the expected velocities on erosion resistant soils, such as the clayey soils present on this
site. However, if easily eroded soils are encountered, mixed grasses, smooth brome grass
or Kentucky blue grass should be used and a stone channel-lining should be installed
along the bottom of the channel.
The second conveyance structure is located along the northern perimeter of the
stormwater management area and it will collect and convey stormwater flowing across
the blacktop plant area. Design parameters are obtained from the Grassed Waterway
Detail contained within the NYS Standards and Specification for Sediment and Erosion
Control. In accordance with these standards, a grass-lined channel shall be designed
using the 10-year 24-hour storm event. Stormwater routing was conducted using TR20
modeling developed by Hydrocad. Results from the modeling suggest that the channel
during the design event will adequately handle a capacity of 52 cfs. This is well above
the capacity required of approximately 35 cfs. Modeling results, however, determine that
the channel would flow with a velocity of approximately 3.6 fps. Using the chart of
Permissible Velocities for Selected Seed Mixtures contained with the NYS Standards and
Specification for Sediment and Erosion Control (Page 3.25), any seed mixture can
adequately handle the expected velocities on erosion resistant soils, such as the clayey
soils present on this site. However, if easily eroded soils are encountered, mixed grasses,
smooth brome grass or Kentucky blue grass should be used and a stone channel-lining
should be installed along the bottom of the channel.
3.2.4.2 Sediment Trap
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An isolated single pond sediment trap will be constructed as part of the stormwater
management system. The sediment trap will be located directly adjacent to the unpaved
stockpile area and the partially-paved blacktop plant area. The sediment trap has been
designed to meet the intent of the NYS DEC SDM. The sediment trap has been designed
to contain twenty-five percent (25%) of the WQv storm event. The sediment trap will be
developed with a low level outlet, a primary outlet and an overflow outlet. Low level and
primary outlet will discharge to the sand filter. The overflow outlet will discharge to the
dry detention basin.
3.2.4.3 Sand Filter
A surface sand filter will be constructed as part of the stormwater management system.
The surface sand filter has been designed to meet the intent of the NYS DEC SDM. The
surface sand filter will have a total surface area of 2,495 square feet. The extended
detention provided above the surface sand filter is capable of containing the 1-Yr 24-hour
storm event, providing Channel Protection as required by the NYS DEC SDM. The
surface sand filter will discharge from the under-drain system to a manhole and culvert
system connected to the existing City of Rensselaer Stormwater management System.
During larger storms, excess stormwater above the capacity of the surface sand filter will
be diverted to the dry detention facility for treatment prior to discharge. On-site re-use of
stormwater as a dust control material will be withdrawn for the surface sand filter for re-
use.
3.2.4.7 Stormwater Detention Basin
A stormwater dry detention basin will be constructed as part of the stormwater
management system. The basin structure will be graded to meet all of the criteria
outlined within the NYS Stormwater Design Manual. The new basin will be the
overflow treatment device in the stormwater management system. Excess stormwater,
above the WQv storm event, will be routed from the sediment trap to the dry detention
pond. The pond system has been designed to provide internal slopes not exceeding 3:1.
Sediment storage capacity has been included below the low-level spillway. The outlet
device configuration is based upon use of a primary concrete drop structure with an open-
grate outlet and a low-level outlet device. A valved two-inch diameter de-watering outlet
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will be placed at elevation 15 feet above msl. Small diameter orifice type outlets will be
constructed in accordance with the NYS DEC SDM. The primary overflow outlet, a
grated horizontal opening, will be set at elevation 20 feet amsl. The corresponding top of
the impoundment structure is established at elevation 21 feet above msl. Stormwater
routing of the critical storm events has been conducted using Hydrocad TR20 stormwater
modeling. The results indicate the stormwater control system will function adequately
for all expected storm events up to, and including, the 100-year 24-hour storm event.
Results suggest the primary 2’ by 2’ open-grate outlet will adequately control the
stormwater flows of the 100-year storm event. Full site modeling for post-construction
stormwater control conditions, suggests the outfall and grading changes at the site will
not exacerbate the stormwater flows within the sub-catchment containing the existing
stormwater drainage system.
3.2.4.8 Hydrologic And Hydraulic Analysis For All Structural Components
Hydrologic analysis of the site has been prepared using Hydrocad TR20 modeling.
Results of the hydrologic modeling are included in Appendix F. Hydraulic analysis of
the proposed stormwater management structures has been completed in accordance with
the NYS Stormwater Design Manual and/or the NYS Standards and Specification for
Sediment and Erosion Control.
Appendix F contains several runs of the stormwater models. A pre-construction model
has been developed to predict the existing conditions at the City of Rensselaer
Stormwater management System given the current state of the un-used industrial
property. Model results have been included for the WQv, 1-yr., 10-Yr and 100-Yr 24-
Hour storm events. Additionally, the proposed conditions, after construction, have been
provided. The models contain the same references to the Cityof Rensselaer Stormwater
management System. The same storm events have been modeled. A summary of the pre
and post development model results is provided.
4.0 INSPECTION SCHEDULE
In accordance with the New York State Standards and Specifications for Erosion and
Sediment Control, New Castle Asphalt will inspect and ensure that the erosion and
29
sediment controls identified in the SWPPP are being maintained in effective operating
condition at all times. Also as required by this document, New Castle Asphalt will
perform a site inspection following every storm event.
Under the SPDES General Construction Permit (GP-0-08-001), site inspections are
required to be performed at least once every seven days by a qualified inspector
1
. The
site inspection will include an evaluation of all erosion and sediment control practices to
ensure integrity and effectiveness, all post-construction stormwater management
practices under construction to ensure that they are constructed in conformance with the
SWPPP, all areas of disturbance that have not achieved final stabilization, and all points
of discharge from the construction site.
Following each inspection, the qualified inspector will prepare an inspection report,
which will include and/or address, at a minimum, the following:
• Date and time of inspection;
• Name and title of person(s) performing inspection;
• A description of the weather and soil conditions (e.g. dry, wet, saturated) at the
time of inspection;
• A description of the condition of the runoff at all points of discharge from the
construction site. This shall include identification of any discharges of sediment
from the construction site. Includes discharges from conveyance systems (i.e.
pipes, culverts, ditches, etc.) and overland flow;
1
Qualified Inspector – A person that is knowledgeable in the principles and practices of erosion and
sediment control, such as a licensed Professional Engineer, Certified Professional in Erosion and Sediment
Control (CPESC), licensed Landscape Architect, or other Department endorsed individual(s). It also means
someone working under the direct supervision of the licensed Professional Engineer or licensed Landscape
Architect, provided that person has training in the principles and practices of erosion and sediment control.
Training in the principles and practices of erosion and sediment control means that an individual
performing a site inspection has received four hours of training, endorsed by the Department, from a Soil
and Water Conservation District, CPESC, Inc. or other Department endorsed entity in proper erosion and
sediment control principles no later than two years from date this general permit is issued. After receiving
the initial training, an individual working under the direct supervision of the licensed Professional Engineer
or licensed Landscape Architect shall receive four hours of training every three years. Note: Inspections of
any post-construction stormwater management practices that include structural components, such as a dam
for an impoundment, shall be performed by a licensed Professional Engineer.
30
• A description of the condition of all natural surface water bodies locted within, or
immediately adjacent to, the property boundaries of the construction site which
receive run-off from the disturbed areas. This shall include identification of any
discharges of sediment to the surface water body;
• Identification of all erosion and sediment control practices that need repair or
maintenance;
• Identification of all erosion and sediment control practices that were not installed
properly or are not functioning as designed and need to be reinstalled or replaced;
• Description and sketch of areas that are disturbed at the time of the inspection and
areas that have been stabilized (temporary and/or final) since the last inspection;
• Current phase of construction of all post-construction stormwater management
practices and identification of all construction that is not in conformance with the
SWPPP and technical standards; and
• Corrective action(s) that must be taken to install, repair, replace or maintain
erosion and sediment control practices; and to correct deficiencies identified with
the construction of the post-construction stormwater management practice(s).
• Digital photographs, with date stamp, that clearly show the condition of all
practices that have been identified as needing corrective actions. The qualified
inspector shall attach paper copies of the photographs to the inspection report
being maintained on-site within seven (7) days of the date of inspection. The
qualified inspector shall take digital photographs, with date stamp, that clearly
show the condition of the practices after the corrective actions has been
completed. The qualified inspector shall attach paper copies of the photographs
to the inspection report that documents the completion of the corrective action
work within seven (7) days of that inspection.
Within one business day of the completion of an inspection, the qualified inspector will
notify New Castle Asphalt and appropriate contractor (or subcontractor) of any corrective
actions that need to be taken. The contractor (or subcontractor) shall begin implementing
the corrective actions within one business day of this notification and shall complete the
corrective actions in a reasonable time frame.
31
All inspection reports will be signed by the qualified inspector. The inspection reports
will be maintained on site with the SWPPP.
New Castle Asphalt will have a qualified professional
2
perform a final site inspection
prior to submitting the NOT. The qualified professional will certify that all disturbed
areas have achieved final stabilization; all temporary structural erosion and sediment
control measures have been removed; and that all post-construction stormwater
management practices have been constructed in conformance with the SWPPP by signing
the "Final Stabilization
3
" and "Post-Construction Stormwater Management Practice"
certification statements on the NOT.
New Castle Asphalt will retain a copy of the General Permit GP-0-10-001, the NOI, MS4
Acceptance Letter, the NOI Acknowledgment Letter, the SWPPP and any inspection
reports that were prepared in conjunction with this permit for a period of at least five
years from the date that the site achieves final stabilization. This period may be extended
by the Department, in its sole discretion, at any time upon written notification.
5.0 OPERATIONS AND MAINTENANCE PLAN
The following section describes the inspection and maintenance schedules for each of the
stormwater treatment systems. Inspection and maintenance of these systems are the
responsibility of New Castle Asphalt LLC, or the current property owner. Following
2
Qualified Professional – A person that is knowledgeable in the principles and practices of stormwater
management and treatment, such as a licensed Professional Engineer, licensed Landscape Architect or other
Department endorsed individual(s). Individuals preparing SWPPPs that require the post-construction
stormwater management practice component must have an understanding of the principles of hydrology,
water quality management practice design, water quantity control design, and, in many cases, the principles
of hydraulics in order to prepare a SWPPP that conforms to the Department's technical standard. All
components of the SWPPP that involve the practice of engineering, as defined by the NYS Education Law
(see Article 145), shall be prepared by, or under the direct supervision of, a professional engineer licensed
to practice in the State of New York.
3
Final Stabilization means that all soil-disturbing activities at the site have been completed and a uniform,
perennial vegetative cover with a density of eighty percent has been established or equivalent stabilization
measures (such as the use of mulches or geotextiles) have been employed on all unpaved areas and areas
not covered by permanent structures.
32
construction of the stormwater treatment system, monitoring (during the construction
cycle) will be performed monthly and following all major storm events (>1 inch in 24
hours). After the construction cycle is complete, monitoring will be performed on a
quarterly basis in accordance with a Multi-Section General Permit for Stormwater
Discharges Associated with an Industrial Activity. Monitoring will verify that all
stormwater management systems are working as intended. Dewatering times will be
monitored and recorded to determine if maintenance activities are necessary. A logbook
of all maintenance activities will be maintained on site.
5.1 Drainage Swale
As stated in the New York State Stormwater Management Design Manual, the following
criteria are required as part of the maintenance for open channel systems:
• Sediment build-up within the bottom of the channel or filter strip is removed
when 25% of the original WQ
V
volume has been exceeded;
• Vegetation in dry swales is mowed as required during the growing season to
maintain grass heights in the 4 to 6 inch range.
5.2 Stormwater Management Basins
As stated in the New York State Stormwater Management Design Manual, the following
criteria are required as part of the maintenance for the stormwater managementsystem:
• The principal spillway shall be equipped with a removable trash rack, and must be
generally accessible from dry land;
• Sediment removal in the sediment trap shall occur every five to six years or after
50% of total sediment trap capacity has been lost;
• As the basins collect stormwater runoff from the hot asphalt mixing facility
(blacktop plant), the removed media will be examined for visual or odor
indications of petroleum or chemical contamination. In the event of a noticeable
sheen or odor, the material will be sampled, analyzed, and disposed of in
accordance with current regulatory standards.
33
• Care should be exercised during basin drawdown to prevent rapid drawdown and
minimize downstream discharge of sediments or anoxic water. The approving
jurisdiction (NYSDEC and/or City of Rensselaer) should be notified before
draining the basin;
• The basins shall not be drained during the spring season. Due to temperature
stratification and high chloride concentrations at the bottom, the water may
become highly acidic and anoxic and may cause negative downstream effects.
34
Contractor Certification Statement
“ I hereby certify that I understand and agree to comply with the terms and conditions of
the SWPPP and agree to implement any corrective actions identified by the qualified
inspector during a site inspection. I also understand that the owner or operator must
comply with the terms and conditions of the most current version of the New York State
Pollutant Discharge Elimination System (SPDES) general permit for stormwater
discharges from construction activities and that it is unlawful for any person to cause or
contribute to a violation of water quality standard. Furthermore, I understand that
certifying false, incorrect or inaccurate information is a violation of the referenced permit
and the laws of the State of New York and could subject me to criminal, civil and/or
administrative proceedings.”
Specific Elements Contractor is Responsible For Implementing:
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
Signed: _____________________________________
Name: ______________________________________
Title: _______________________________________
Date: __________________________
Name of Contractor’s Trained Individual Responsible for Implementation of SWPPP:
Name: _______________________________________
Title: ________________________________________
Name of Contracting Firm: _____________________________________________
Address: ____________________________________________________________
______________________________________________________________
Telephone Number: ____________________________________________________
Name of Site:
New Castle Asphalt Rensselaer Construction Project
35
APPENDIX A
Page 1 of 10
New York State Department of Environmental Conservation
Division of Water
625 Broadway, 4th Floor
Albany, New York 12233-3505
All sections must be completed unless otherwise noted
. Failure to complete all items may
result in this form being returned to you, thereby delaying your coverage under this
General Permit. Applicants must read and understand the conditions of the permit and
prepare a Stormwater Pollution Prevention Plan prior to submitting this NOI. Applicants
are responsible for identifying and obtaining other DEC permits that may be required.
-IMPORTANT-
RETURN THIS FORM TO THE ADDRESS ABOVE
OWNER/OPERATOR
MUST SIGN FORM
Stormwater Discharges Associated with
Construction Activity
Under State
Pollutant Discharge Elimination System (SPDES) General Permit # GP-0-10-001
Owner/Operator Information
Owner/Operator Contact Person Last Name (NOT CONSULTANT)
Owner/Operator Contact Person First Name
Owner/Operator Mailing Address
City
State Zip
-
Phone (Owner/Operator)
- -
Fax (Owner/Operator)
- -
Email (Owner/Operator)
Owner/Operator (Company Name/Private Owner Name/Municipality Name)
NYR
(for DEC use only)
FED TAX ID
-
(not required for individuals)
1358331598
New Castle Asphalt LLC
Valente
Roderick
118 Button Road
Waterford
NY
12188
12188
518
432
4470
518-432-4470
518
432
4901
518-432-4901
27
3457889
27-3457889
1. Provide the Geographic Coordinates for the project site in NYTM Units. To do this you
must
go to the NYSDEC Stormwater Interactive Map on the DEC website at:
www.dec.ny.gov/imsmaps/stormwater/viewer.htm
Zoom into your Project Location such that you can accurately click on the centroid of
your site. Once you have located your project site, go to the tool boxes on the top and
choose "i"(identify). Then click on the center of your site and a new window containing
the X, Y coordinates in UTM will pop up. Transcribe these coordinates into the boxes
below. For problems with the interactive map use the help function.
X Coordinates (Easting) Y Coordinates (Northing)
Project Site Information
Project/Site Name
Street Address (NOT P.O. BOX)
City/Town/Village (THAT ISSUES BUILDING PERMIT)
State Zip
-
County
Name of Nearest Cross Street
Distance to Nearest Cross Street (Feet) Project In Relation to Cross Street
North South East West
Page 2 of 10
2. What is the nature of this construction project?
New Construction
Redevelopment with increase in imperviousness
Redevelopment with no increase in imperviousness
Section-Block-Parcel
Tax Map Numbers
Side of Street
North South East West
DEC Region
Tax Map Numbers
1863331599
Rensslear Plant Construction Project
Riverside Drive
City of Rensselaer
NY
12144
12144
Rensselaer
4
Irwin Stewart Expressway
0
154-5-3
602384
4791997
4791997
3. Select the predominant land use for both pre and post development conditions.
SELECT ONLY ONE CHOICE FOR EACH
8. Do you plan to disturb more than 5 acres of soil at any one time?
9. Indicate the percentage of each Hydrologic Soil Group(HSG) at the site.
Page 3 of 10
Existing Land Use
FOREST
PASTURE/OPEN LAND
CULTIVATED LAND
SINGLE FAMILY HOME
SINGLE FAMILY SUBDIVISION
TOWN HOME RESIDENTIAL
MULTIFAMILY RESIDENTIAL
INSTITUTIONAL/SCHOOL
INDUSTRIAL
COMMERCIAL
ROAD/HIGHWAY
RECREATIONAL/SPORTS FIELD
BIKE PATH/TRAIL
LINEAR UTILITY
PARKING LOT
OTHER
. .
Future Land Use
SINGLE FAMILY HOME
SINGLE FAMILY SUBDIVISION
TOWN HOME RESIDENTIAL
MULTIFAMILY RESIDENTIAL
INSTITUTIONAL/SCHOOL
INDUSTRIAL
COMMERCIAL
MUNICIPAL
ROAD/HIGHWAY
RECREATIONAL/SPORTS FIELD
BIKE PATH/TRAIL
LINEAR UTILITY (water, sewer, gas, etc.)
PARKING LOT
CLEARING/GRADING ONLY
DEMOLITION, NO REDEVELOPMENT
WELL DRILLING ACTIVITY *(Oil, Gas, etc.)
OTHER
Yes No
Pre-Development
Post-Development
4. Will future use of this site be an agricultural property as defined
by the NYS Agriculture and Markets Law ?
Yes No
Yes No
5.
Is this a project which does not require coverage under the General
Permit (e.g. Project done under an Individual SPDES Permit, or
department approved remediation)?
Yes No
6.
Is this property owned by a state authority, state agency, federal
government or local government?
A B C D
%
%
%
%
Number of Lots
Total Site
Acreage
. .
Acreage To
Be Disturbed
Existing Impervious
Area Within Disturbed
Future Impervious
Area Within Disturbed
7.
In accordance with the larger common plan of development or sale, enter the total
project site acreage, the acreage to be disturbed and the future impervious area
(acreage)within the disturbed area. Round to the nearest tenth of an acre.
*note: for gas well drilling, non-high volume hydraulic fractured wells only
7387331596
12
4
12.4
6
1
6.1
6
1
6.1
5
6
5.6
100
Page 4 of 10
Name
10. Is this a phased project?
Yes No
11. Enter the planned start and
end dates of the disturbance
activities.
-
Start Date
/ /
End Date
/ /
12. Identify the nearest, natural, surface waterbody(ies) to which construction site
runoff will discharge.
12a.
Type of waterbody identified in
Question 12?
Wetland / State Jurisdiction On Site (Answer 12b)
Wetland / State Jurisdiction Off Site
Wetland / Federal Jurisdiction On Site (Answer 12b)
Wetland / Federal Jurisdiction Off Site
Stream / Creek On Site
Stream / Creek Off Site
River On Site
River Off Site
Lake On Site
Lake Off Site
Other Type On Site
Other Type Off Site
12b. How was the wetland identified?
Regulatory Map
Delineated by Consultant
Delineated by Army Corps of Engineers
Other (identify)
13.
Has the surface waterbody(ies) in question 12 been identified as a
303(d) segment in Appendix E of GP-0-10-001?
14.
Is this project located in one of the Watersheds identified in
Appendix C of GP-0-10-001?
Yes No
Yes No
15.
Is the project located in one of the watershed
areas associated with AA and AA-S classified
waters?
If no, skip question 16.
Yes No
9155331591
6
1
2011
6/1/2011
9
1
2011
9/1/2011
Hudson River
18.
Does the site runoff enter a separate storm sewer
system (including roadside drains, swales, ditches,
culverts, etc)?
19. What is the name of the municipality/entity that owns the separate storm sewer system?
Yes No Unknown
20.
Does any runoff from the site enter a sewer classified
as a Combined Sewer?
Yes No Unknown
16.
Does this construction activity disturb land with
no existing impervious cover and where the Soil Slope
Phase is identified as an E or F on the USDA Soil
Survey?
If Yes, what is the acreage to be disturbed?
Yes No
.
21.
Has the required Erosion and Sediment Control component of the
SWPPP been developed in conformance with the current NYS
Standards and Specifications for Erosion and Sediment Control
(aka Blue Book) ?
22.
Does this construction activity require the development of a
SWPPP that includes Water Quality and Quantity Control
components (Post-Construction Stormwater Management Practices)
(If No, skip questions 23 and 27-35)
23.
Have the Water Quality and Quantity Control components of the
SWPPP been developed in comformance with the current NYS
Stormwater Management Design Manual ?
Yes No
Yes No
Yes No
Page 5 of 10
17.
Will the project disturb soils within a State
regulated wetland or the protected 100 foot adjacent
area?
Yes No
6222331593
City of Rensselaer
Page 6 of 10
SWPPP Preparer
Contact Name (Last, Space, First)
Mailing Address
City
State Zip
-
Phone
- -
Fax
- -
Email
Signature
Date
/ /
First Name
Last Name
MI
SWPPP Preparer Certification
24. The Stormwater Pollution Prevention Plan (SWPPP) was prepared by:
Professional Engineer (P.E.)
Soil and Water Conservation District (SWCD)
Registered Landscape Architect (R.L.A)
Certified Professional in Erosion and Sediment Control (CPESC)
Owner/Operator
Other
I hereby certify that the Stormwater Pollution Prevention Plan (SWPPP) for
this project has been prepared in accordance with the terms and conditions of
the GP-0-10-001. Furthermore, I understand that certifying false, incorrect
or inaccurate information is a violation of this permit and the laws of the
State of New York and could subject me to criminal, civil and/or
administrative proceedings.
4262331595
G-L Engineering P.C.
Visscher Mark
8 Brunswick Road
Troy
NY
12180
12180
518
270
5920
518-270-5920
518
270
5922
518-270-5922
MVisscher@Griggs-Lang.com
Mark
Visscher
2
15
2011
2/15/2011
26. Select
all
of the erosion and sediment control practices that will be
employed on the project site:
Page 7 of 10
Biotechnical
Brush Matting
Wattling
Other
25. Has a construction sequence schedule for the planned management
practices been prepared?
Yes No
Brush Matting
Dune Stabilization
Grassed Waterway
Mulching
Protecting Vegetation
Recreation Area Improvement
Seeding
Sodding
Straw/Hay Bale Dike
Streambank Protection
Temporary Swale
Topsoiling
Vegetating Waterways
Vegetative Measures
Check Dams
Construction Road Stabilization
Dust Control
Earth Dike
Level Spreader
Perimeter Dike/Swale
Pipe Slope Drain
Portable Sediment Tank
Rock Dam
Sediment Basin
Sediment Traps
Silt Fence
Stabilized Construction Entrance
Storm Drain Inlet Protection
Straw/Hay Bale Dike
Temporary Access Waterway Crossing
Temporary Stormdrain Diversion
Temporary Swale
Turbidity Curtain
Water bars
Temporary Structural
Debris Basin
Diversion
Grade Stabilization Structure
Land Grading
Lined Waterway (Rock)
Paved Channel (Concrete)
Paved Flume
Retaining Wall
Riprap Slope Protection
Rock Outlet Protection
Streambank Protection
Permanent Structural
5911331597
Permanent Sediment Trap
Permanent Detention Basin
Page 8 of 10
27. Indicate
all
Stormwater Management Practice(s) that will be
installed/constructed on this site:
Micropool Extended Detention (P-1)
Wet Pond (P-2)
Wet Extended Detention (P-3)
Multiple Pond System (P-4)
Pocket Pond (P-5)
Ponds
Filtering
Surface Sand Filter (F-1)
Underground Sand Filter (F-2)
Perimeter Sand Filter (F-3)
Organic Filter (F-4)
Bioretention (F-5)
Other
Dry Swale (O-1)
Wet Swale (O-2)
Infiltration Trench (I-1)
Infiltration Basin (I-2)
Dry Well (I-3)
Underground Infiltration System
Infiltration
Shallow Wetland (W-1)
Extended Detention Wetland (W-2)
Pond/Wetland System (W-3)
Pocket Wetland (W-4)
28.
Describe other stormwater management practices not listed above or
explain any deviations from the technical standards.
29.
Has a long term Operation and Maintenance Plan for the
post-construction stormwater management practice(s) been
developed?
If Yes, Identify the entity responsible for the long term Operation and Maintenance
Yes No
Open Channels
Wetlands
Rain Garden
Cistern
Green Roof
Stormwater Planters
Permeable Paving (Modular Block)
Alternative Practice
Verified Proprietary Practice
Hydrodynamic
Wet Vault
Media Filter
Post-Construction Stormwater Management Practices
Water Quality and Quantity Control
Important
: Completion of Questions 27-35 is not required
if response to Question 22 is No.
0199331590
Sediment Trap prior to primary surface sand filter for WQv. Dry Detention Basin subsequent to sediment
trap and sand filter for CPv and larger storm events.
New Castle Asphalt LLC
Page 9 of 10
IMPORTANT:
For questions 31 and 32, impervious area should be calculated considering the
project site and all offsite areas that drain to the post-construction stormwater
management practice(s). (Total Drainage Area = Project Site + Offsite areas)
32.
Pre-Construction Impervious Area - As a percent of the
Total
Drainage Area
enter the percentage of the existing impervious
areas before construction begins.
33. Post-Construction Impervious Area - As a percent of the Total
Drainage Area,
enter the percentage of the future impervious areas
that will be created/remain on the site after completion of
construction.
WQv Required
WQv Provided
.
acre-feet
30. Provide the total water quality volume required and the total provided for the site.
.
acre-feet
31b. The need to provide for flood control has been waived because:
.
CFS
CFS
.
Post-development
Pre-Development
Total Extreme Flood Control Criteria (Qf)
- Peak discharge rate for the 100 year storm
.
CFS
.
CFS
Post-development
Pre-Development
Total Overbank Flood Control Criteria (Qp)
-
Peak discharge rate for the 10 year storm
Site discharges directly to fourth order stream or larger
31a. The need to provide for channel protection has been waived because:
.
acre-feet
CPv Provided
acre-feet
.
CPv Required
Total Channel Protection Storage Volume (CPv)
- Extended detention of
post-developed 1 year, 24 hour storm event
31.
P
rovide the following Unified Stormwater Sizing Criteria for the site.
Site discharges directly to fourth order stream or larger
Downstream analysis reveals that flood control is not required
34.
Indicate the total number of post-construction stormwater
management practices to be installed/constructed.
35. Provide the total number of stormwater discharge points from
the site. (include discharges to either surface waters or to
separate storm sewer systems)
%
%
2994331595
0
43
0.43
0
43
0.43
0
88
0.88
0
88
0.88
34
7
34.7
14
2
14.2
51
8
51.8
25
3
25.3
60
59
4
1
Page 10 of 10
DEC Permits
36. Identify other DEC permits that are required for this project.
40.
If this NOI is being submitted for the purpose of continuing coverage under a
general permit for stormwater runoff from construction activities, please
indicate the former SPDES number assigned.
Owner/Operator Certification
I have read or been advised of the permit conditions and believe that I understand them. I also
understand that, under the terms of the permit, there may be reporting requirements. I hereby certify
that this document and the corresponding documents were prepared under my direction or supervision. I am
aware that there are significant penalties for submitting false information, including the possibility of
fine and imprisonment for knowing violations. I further understand that coverage under the general permit
will be identified in the acknowledgment that I will receive as a result of submitting this NOI and can
be as long as sixty (60) business days as provided for in the general permit. I also understand that, by
submitting this NOI, I am acknowledging that the SWPPP has been developed and will be implemented as the
first element of construction, and agreeing to comply with all the terms and conditions of the general
permit for which this NOI is being submitted.
Owner/Operator Signature
Date
/ /
Print First Name
Print Last Name
MI
38. Is this project subject to the requirements of a regulated,
traditional land use control MS4?
(If No, skip question 39)
Yes No
39. Has the "MS4 SWPPP Acceptance" form been signed by the principal
executive officer or ranking elected official and submitted along
with this NOI?
Yes No
Air Pollution Control
Coastal Erosion
Hazardous Waste
Long Island Wells
Mined Land Reclamation
Other SPDES
Solid Waste
None
Other
Navigable Waters Protection / Article 15
Water Quality Certificate
Dam Safety
Water Supply
Freshwater Wetlands/Article 24
Tidal Wetlands
Wild, Scenic and Recreational Rivers
Stream Bed or Bank Protection / Article 15
37.
Does this project require a US Army Corps of Engineers
Wetland Permit?
If Yes, Indicate Size of Impact.
Yes No
.
3484331590
PBS
NYR
Roderick
Valente
2
15
2011
2/15/2011
APPENDIX B
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G-L Engineering P.C. 8 Brunswick Road Troy, New (City of Renssealaer, NY)

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Completed 14 July 2020

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