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145. The project shall comply with the City of Pleasanton's Stormwate r NPDES Permit #CAS612008, dated October 14, 2009 and amendments (hereafter referred to as NPDES Permit). This NPDES Permit is issued by the California Regional Water Quality Control Board, San Francisco Bay Region (hereafter referred to as Regional Water Quality Control Board). Information related to the NPDES Permit is available at the City of Pleasanton Community Development Department, Engineering Division, and on line at: • http://www.ci.pleasanton.ca.us/business/planning/StormWate-.html • http://www.waterboards.ca.gov/sanfranciscobay/water issueE/grog rams/stor mwater/Municipal/index.shtml Design Requirements 146. NPDES Permit design requirements include, but are not limited to, the following: a. Source control, site design, implementation, and maintenance standards when a regulated project (such as a residential subdivision project) creates and/or replaces 10,000 square feet or more of impervious surface, including roof area, street, and sidewalk. b. Hydromodification standards when a regulated project creates and/or replaces a total impervious area of one acre or more. c. Compliance with a Diazinon pollutant reduction plan (Pesticide Plan) to reduce or substitute pesticide use with less toxic alternatives. d. Compliance with a Copper Pollutant Reduction Plan and a Mercury Pollutant Reduction Plan. 147. The following requirements shall be incorporated into the project: a. The project developer shall submit a final grading and drainage plan prepared by a licensed civil engineer depicting all final grades and onsite drainage control measures including bioretention swales. Irrigated bioretention swales shall be designed to maximize stormwater entry at their mos: upstream point. The grading and drainage plans shall be subject to the review and approval of the City Engineer prior to the issuance of a grading or building permit, whichever is sooner. b. In addition to natural controls, the project developer may be required to install a structural control(s), such as an oil/water separator(s), sand filter(s), or approved equal(s) in the parking lot and/or on the site to irtercept and pre- treat stormwater prior to reaching the storm drain. The design, location(s), and a schedule for maintaining the separator shall be submitted to the City Engineer/Chief Building Official for review and approval prior to the issuance 13-Unit)Development Plan Ponderosa Homes PUD-97, Conditions of Approval 27 of 32 42C2 Stanley Boulevard