ORD 1983 - Laserfiche WebLink

117. Approval of the storm drainage system shall be subject to the review and approval of the City Engineer and Zone 7, as applicable, to determine that the system is adequate, connects to an approved point of discharge, meets any and all applicable requirements of the Alameda County Flood Control District -Zone 7, meets any and all applicable requirements of the Federal Emergency Management Flood Hazard Program, the California Department of Fish and Game, and meets the immediate and long-range requirements of this development and all upstream areas intended to be drained through this development. 118. Any damage to existing street improvements during construction on the subject property shall be repaired to the satisfaction of the City Engineer at full expense to the project developer. This shall include slurry seal, overlay, or street reconstruction if deemed warranted by the City Engineer. 119. The paving sections for the on-site parking and drive areas shall be designed on the basis of an R-Value test and a traffic index to carry the anticipated traffic loads. This design shall be subject to the approval of the City Engineer. The minimum paving section shall be two inches (2") of asphalt concrete (A.C.) on a six-inch (6") asphalt base (A.B.). The minimum A.C. pavement slope shall be one percent (1%). For pavement slopes of one percent, the surface runoff shall be carried in a concrete gutter to an acceptable point of discharge. The minimum slope for concrete gutter shall be 0.5 percent. 120. Six-inch (6") vertical concrete curbs shall be installed between the new parking spaces and the landscaped areas. Stormwater Design Requirements 121. In addition to the Standard Urban Stormwater Runoff Requirements for compliance with Alameda County NPDES Permit # CA50029831, the project shall comply with the Permit's Hydro Modification requirements unless otherwise approved by the Regional Water Quality Control Board. 122. 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 on-site drainage control measures including bioswales. Irrigated bioswales shall be redesigned as needed to the satisfaction of the City Engineer to optimize the amount of the storm water running off the paved surface that enters the bioswale at its most upstream end. This plan shall be subject to the review and approval of the City Engineer prior to the issuance of any building permits. ~a