SCVURPPP C.3. Data Form Page 2 of 4 September 2019
2. Project Size
a. Total Site Area: ______________acres
b. Total Site Area Disturbed: ____________________ acres
(including clearing, grading, or excavating)
Project Area (ft
c. Total Impervious Area (IA)
d. Total new and replaced impervious area
e. Total Pervious Area (PA)
g. Percent Replacement of IA in Redevelopment Projects: (Existing IA Replaced ÷ Existing Total IA) x 100% _______%
3. State Construction General Permit Applicability:
a. Is #2.b. equal to 1 acre or more?
Yes, applicant must obtain coverage under the State Construction General Permit (see
No, applicant does not need coverage under the State Construction General Permit.
4. MRP Provision C.3 Applicability:
a. Is #2.d. equal to 10,000 sq. ft. or more, or 5,000 sq. ft. or more for restaurants, auto service
facilities, retail gas outlets, and stand-alone uncovered parking?
Yes, C.3. source control, site design and treatment requirements apply
No, C.3. source control and site design requirements may apply – check with local agency
b. For redevelopment projects, is #2.g. equal to 50% or more?
Yes, C.3. requirements (site design and source control, as appropriate, and stormwater
treatment) apply to the entire site
No, C.3. requirements only apply to the impervious area created and/or replaced
c. Does the project create and/or replace 5,000 sf or more of impervious surface parking?
Yes, C.3. requirements may apply to the entire site – check with local agency
5. Hydromodification Management (HM) Applicability:
a. Does the project create and/or replace one acre or more of impervious surface AND is the total
post-project impervious area greater than the pre-project (existing) impervious area?
Yes (continue) No – exempt from HM, go to page 3
b. Is the project located in an area of HM applicability (green area) on the HM Applicability
Map? ( www.scvurppp.org/hmp-map)
Yes, the project must implement HM requirements
No, the project is exempt from HM requirements
“Retained” means to leave existing IA in place. An IA that goes through maintenance (e.g., pavement resurfacing/slurry
seal/grind), but no change in grade is considered “retained”.
The “new” and “replaced” IA are based on the total area of the site and not specific locations on site. For example, impervious
parking created over a pervious area is not “new” IA, if an equal amount of pervious area replaces IA somewhere else on the site.
Constructed IA on a site that does not exceed the total pre-project IA will be considered “replaced” IA. A site will have “new”
IA only if the total post-project IA exceeds the total pre-project IA (total post-project IA – total pre-project IA = New IA).
Include bioretention areas, infiltration areas, green roofs, and pervious pavement in PA calculations.