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A. Design Requirements <br /> 1. NPDES Permit design requirements include, but are not limited to, the <br /> following: <br /> a. Source control, site design, implementation, and maintenance standards <br /> when a regulated project (such as a commercial, industrial, residential <br /> subdivision, mixed use, or public project) creates and/or replaces 10,000 <br /> square feet or more of impervious surface (5,000 square feet for auto <br /> service facilities, retail gasoline outlets, restaurants, and uncovered parking <br /> lots), including roof area, street, and sidewalk. <br /> b. Hydromodification standards when a regulated project creates and/or <br /> replaces a total impervious area of one acre or more. <br /> c. Compliance with a Diazinon pollutant reduction plan (Pesticide Plan) to <br /> reduce or substitute pesticide use with less toxic alternatives. <br /> d. Compliance with a Copper Pollutant Reduction Plan and a Mercury <br /> Pollutant Reduction Plan. <br /> 2. The following requirements shall be incorporated into the project: <br /> a. The project developer shall submit a final grading and drainage plan <br /> prepared by a licensed civil engineer depicting all final grades and onsite <br /> drainage control measures including bioretention swales. Irrigated <br /> bioretention swales shall be designed to maximize stormwater entry at their <br /> most upstream point. The grading and drainage plans shall be subject to <br /> the review and approval of the City Engineer prior to the issuance of a <br /> grading or building permit, whichever is sooner. <br /> b. In addition to natural controls, the project developer may be required to <br /> install a structural control(s), such as an oil/water separator(s), sand filter(s), <br /> or approved equal(s) in the parking lot and/or on the site to intercept and <br /> pre-treat stormwater prior to reaching the storm drain. The design, <br /> location(s), and a schedule for maintaining the separator shall be submitted <br /> to the City Engineer/Chief Building Official for review and approval prior to <br /> the issuance of a grading or building permit, whichever is sooner. The <br /> structural control shall be cleaned at least twice a year (once immediately <br /> prior to October 15 and once in January). <br /> c. The project developer shall submit to the City Engineer the sizing design <br /> criteria and calculations for a hydromodification facility, if required, and for <br /> the treatment of stormwater runoff. The design criteria and calculations <br /> shall be subject to the review and approval of the City Engineer and shall be <br /> 22 of 28 <br />