PC 2005-63 - Laserfiche WebLink

79. Six-inch <6"~ vertical concrete curbs shall be installed between the new parking spaces and the landscaped areas. URBAN STORMWATER RUNOFF REQUIREMENTS Stonnwater Desian Requirements 8U. The project shall comply with the Alatr~eda Clountywide NPDES Permit #CA5002983 7 , a copy of which is available at the City offices. K1 _ The following rcquiretrients 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 f3na1 grades and on-site drainage control m casures 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- h. In addition to natural controls the project developer may be required to install a structural control, such as an oil/water separator, sand filter, or approved equal on the site to intercept and pretreat storm water prior to reaching the storm drain. The design., locations, and a schedule for maintaining the separator shall be submitted to the City Engineer/Director of Building Inspection for review and approval prior to issuance of building permits- The structural control shall be cleaned at least twice a year: once immediately prior to October 15 and once in January. The project developer shall enter into a ~r~aintenance agreement for the oil/water separator. c. The project developer shall submit sizing designs criteria to treat stormwater runoff at the time of plan submittal. d. Landscaping shall be designed to niinitnize irrigation and runoff; promote surface in Filtration where appropriate, and minimize the use of fertilizers and pesticides that can contribute to sionT.water pollution- 1) Structures shall be designed to discourage the occurrence at~d entry of pests into buildings, thus minimizing the need for pesticides- 2) Where feasible, landscaping shall be designed and operated to treat stormwater runoff- In areas that provide detention of water, plants that are tolerant of saturated sot 1 conditions and prolonged exposure to water shall be specified. Soil shall be amended as required- 3) Pla.rtt niatcri als selected shall be appropriate to site speci$c characteristics such as soil type, topography, climate, amount and timing of sunlight, prevailing winds, 12