3_Exhibits A1-A3 - Laserfiche WebLink

Resolution No. PC-2021-07 Page Nineteen Stormwater and Provision C.3 of the National Pollutant Discharge Elimination System Permit 66. STORMWATER TREATMENT: The project creates and/or replaces 10,000 square feet or more of impervious surface (collectively over the entire project site) and shall comply with Section "C.3.b Regulated Projects" of the NPDES Permit No. CAS612008, and amendments, issued by the San Francisco Bay Regional Water Quality Control Board. The improvements plans shall include the Stormwater Management Plan prepared by a California licensed civil engineer, indicating the type and locations of stormwater treatment measures to be installed (numbered sequentially for identification purposes), and sizing calculations. The Stormwater Management Plan shall be subject to review and acceptance by the Director of Engineering/City Engineer, prior to the issuance of an engineering or building permit, whichever occurs first. 67. STORMWATER TREATMENT MEASURES INSPECTION AND MAINTENANCE AGREEMENT: The applicant shall enter into a "Stormwater Treatment Measures Inspection and Maintenance Agreement" for annual maintenance and reporting of the stormwater treatment system as depicted on the improvement plans City-approved by the Director of Engineering/City Engineer. The agreement shall be filed for record at the Alameda County Clerk-Recorder's Office at a time determined by the Director of Engineering/City Engineer. 68. HYDROMODIFICATION MANAGEMENT: The project will create and/or replace 1 acre or more of impervious surface and increase the total impervious surface area over the pre- project surface area and shall comply with Section "C.3.g Hydromodification Management" of NPDES Permit No. CAS612008 and amendments, issued by the San Francisco Bay Regional Water Quality Control Board, except where on the three provisions stated in the permit applies. Post construction stormwater runoff shall drain to approved permanent Hydromodification Management (HM) controls to mitigate increases in peak runoff flow and increased runoff volume created by the project. The improvement plans shall include the Stormwater Management Plan, prepared by a California licensed civil engineer, indicating the type and locations of HM controls to be installed, sizing calculations using Bay Area Hydrology Model (BAHM). The Stormwater Management Plan shall be subject to review and acceptance by the Director of Engineering/City Engineer, prior to issuance of an engineering or building permit, whichever occurs first. Stormwater HM controls required under this condition shall be provided for in the Stormwater Treatment Measures Inspection and Maintenance Agreement. 69. STATE OF CALIFORNIA CONSTRUCTION GENERAL PERMIT: A "Notice of Intent" (NOI) and "Stormwater Pollution Prevention Plan" (SWPPP) shall be prepared for construction projects disturbing 1 acre or more of land (including smaller sites that are part of a larger common plan of development). The applicant shall include the Waste Discharger Identification Number (WDID) on the title sheet of the improvement plans and provide proof of coverage under the State of California Construction General Permit to the Engineering Department prior to the approval of the improvement plans by the Director of Engineering/City Engineer. pril 30 unless erosion control measures are in place, subject to the review and approval of the Chief Building and Safety Official. Such measures shall be maintained until the ould prevent or 4412928_2 -10- the Project, which list shall include the following items: 4412928_2 -8-