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81. The paving sections for the on -site parking and drive areas shall be designed on <br />the basis of an R -Value test and a traffic index to carry the anticipated traffic <br />loads. This design shall be subject to the approval of the City Engineer. The <br />minimum paving section shall be two inches (2 ") of asphalt concrete (A.C.) on a <br />six -inch (6 ") asphalt base (A.B.). The minimum A.C. pavement slope shall be one <br />percent (1 %). For pavement slopes less than one percent, the surface runoff shall <br />be carried in a concrete gutter to an acceptable point of discharge. The minimum <br />slope for concrete gutter shall be 0.5 percent. <br />82. Six -inch (6 ") vertical concrete curbs shall be installed between the new parking <br />spaces and the landscaped areas. <br />URBAN STORMWATER RUNOFF REQUIREMENTS <br />Stormwater Design Requirements <br />83. The project shall comply with the Alameda Countywide NPDES Permit <br />#CA50029831, a copy of which is available at the City offices. <br />84. The following requirements shall be incorporated into the project: <br />a. The project developer shall submit a final grading and drainage plan prepared <br />by a licensed civil engineer depicting all final grades and on -site drainage <br />control measures including bioswales. Irrigated bioswales shall be redesigned <br />as needed to the satisfaction of the City Engineer to optimize the amount of the <br />storm water running off the paved surface that enters the bioswale at its most <br />upstream end. This plan shall be subject to the review and approval of the City <br />Engineer prior to the issuance of any building permits. <br />b. The project developer shall submit sizing designs criteria to treat stormwater <br />runoff at the time of plan submittal. <br />c. Landscaping shall be designed to minimize irrigation and runoff, promote <br />surface infiltration where appropriate, and minimize the use of fertilizers and <br />pesticides that can contribute to stormwater pollution. <br />1) Structures shall be designed to discourage the occurrence and entry of pests <br />into buildings, thus minimizing the need for pesticides. <br />2) Where feasible, landscaping shall be designed and operated to treat <br />stormwater runoff. In areas that provide detention of water, plants that are <br />tolerant of saturated soil conditions and prolonged exposure to water shall <br />be specified. Soil shall be amended as required. <br />13 <br />