AgdaPkt 2012-07-09 - Laserfiche WebLink

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8.A. - Page 64 ATTACHMENT2 (vi) Hydromodification management measures so that post-project stormwater runoff does not exceed the flow and duration of pre- project runoff, if required under the NPDES permit. b. The following additional information shall be submitted with the post- construction stormwater management plan: (i) Detailed hydraulic sizing calculations for each stormwater treatment measure proposed; and (ii) Pollutant removal information demonstrating that any proposed manufactured/ mechanical (i.e. non-landscape-based) stormwater treatment measure, when not used in combination with a landscape-based treatment measure, is capable of removing the range of pollutants typically removed by landscape-based treatment measures and/or the range of pollutants expected to be generated by the project. c. All proposed stormwater treatment measures shall incorporate appropriate planting materials for stormwater treatment (for landscape-based treatment measures) and shall be designed with considerations for vector/mosquito control. Proposed planting materials for all proposed landscape-based stormwater treatment measures shall be included on the landscape and irrigation plan for the project. The applicant is not required to include on-site stormwater treatment measures in the post-construction stormwater management plan if he or she secures approval from the City Engineer of an alternative proposal that demonstrates compliance with the requirements of the Provision C.3 of the National Pollutant Discharge Elimination System (NPDES) permit issued to the San Mateo Countywide Clean Water Program. d. Applicant shall enter into a Stormwater Treatment Measures Maintenance Agreement, in accordance with Provision C.3.e of the NPDES permit, which agreement shall provide, among other thing, that: (i) The applicant accepts responsibility for the adequate installation/ construction, operation, maintenance, inspection, and reporting of any on-site stormwater treatment measures being incorporated into the project until the responsibility is legally transferred to another entity; and (ii) The applicant provides and ensures legal access to the on-site stormwater treatment measures for representatives of the City, the local vector control district, and staff of the Regional Water Quality Control Board, San Francisco Region, for the purpose of verifying the implementation, operation, and maintenance of the on-site stormwater treatment measures and taking corrective action if necessary. The agreement shall be reviewed and approved by the ATTY/RES0.2263/APPROVING A PLANNED DEVELOPMENT PERMIT(FINGER AVE) REV:07-02-12 VR Page 15 of 19