ORD 2035 - Laserfiche WebLink

175. Until November 30, 2014, the current Municipal Regional Stormwater NPDES Permit No. is #CAS612008 which was adopted on October 14, 2009. This permit was amended on November 28, 2011, by California Regional Water Quality Control Board, San Francisco Bay Region. The project shall also comply with the current NPDES General Permit by the State Water Resources Control Board for Storm Water Discharges Associated with Construction and Land Disturbance Activities until September 2, 2014, the current NPDES General Permit No. is CAS000002, Order No. 2009-0009-DWQ. A copy of the above mentioned current NPDES permits are available at the City of Pleasanton's Engineering Division and Building and Safety Division; Alameda County Clean Water Program and at the State Water Board website. Design Requirements 176. The Permit design requirements include, but are not limited to, the following: a. Source control, site design measures, and design and implementation of stormwater treatment with Low Impact Development (LID) treatment measures, Industrial and Commercial Site Control, Pesticides Toxicity Control, Trash Load Reduction, Mercury Controls, PCB (Polychlorinated Biphenyls) Controls, Copper Controls, etc. 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. 177. 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 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 grading or building permits. b. In addition to natural controls the project developer may be required to install a structural control, such as an oil/water separator, sand filter, and devices for trash capture. These trash capture devises shall be certified for trash capture by the San Francisco Bay Water Board. All structural controls shall intercept and pre-treat stormwater prior to reaching the public storm drain. The design, locations, and a schedule for maintaining the structural controls shall be submitted to the City Engineer/Chief Building Official 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. c. The project developer shall submit sizing design criteria to treat stormwater runoff and hydromodification; additional updated detailed copies of calculations maybe required with subsequent plan check submittals. d. Landscaping shall be designed to minimize irrigation and runoff, promote surface infiltration where appropriate and acceptable to the project soils engineer, and minimize the use of fertilizers and pesticides that can contribute to stormwater pollution. PUD-85-08-12D and P11-0856 Hacienda TOD Site 1, BRE Conditions of Approval 21 of 25 Mixed-Use Development