ORD 2057 - Laserfiche WebLink

Urban Stormwater 80.The project shall comply with the "Alameda Countywide NPDES Permit #CAS612008 dated October 14, 2009 and amendments to this permit" issued the by California Regional Water Quality Control Board, San Francisco Bay Region, a copy of which is available at the Community Development Department, Public Works/Engineering section at City offices, Alameda County Clean Water Program and at State Water Board 81.The project shall also comply with the "Construction General Permit" by the California Regional Water Quality Control Board, San Francisco Bay Region. A. Design Requirements 1. The Permit design requirements include, but are not limited to, the following: a) Source control, sight design measures, and design and implementation of stormwater treatment measures are required when commercial, industrial or residential development creates and replaces 10,000 square feet or more of impervious surface, including but not limited to roof area, streets and sidewalk. b) Hydro-modification standards are required when a new development or redevelopment project creates and replaces total impervious area of one acre or more. c) The Permit requires a proactive Diazinon pollutant reduction plan (aka Pesticide Plan) to reduce or substitute pesticide use with less toxic alternatives. d) The Permit requires complying with the Copper Pollutant Reduction Plan and the Mercury Pollutant Reduction Plan. e) Low Impact Development criteria are required to reduce runoff and mimic site's pre-development hydrology. 2. The following requirements shall be incorporated into the project: a) The applicant 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 bio-swales. Irrigated bio-swales shall be redesigned as needed to the satisfaction of the City Engineer to optimize the amount of the stormwater running off the paved surface that enters the bio-swale 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. b) In addition to natural controls the applicant may be required to install a structural control, such as an oil/water separator, sand filter, or approved equal (in the parking lot) (on the site) to intercept and pre-treat stormwater prior to reaching the storm drain. The design, locations, and a schedule for maintaining the separator shall be submitted to the City Engineer/Chief Building Official for review and approval prior to issuance of building permits.