Laserfiche WebLink
creates and replaces 10,000 square feet or more of impervious surface, including roof area, <br /> streets, and sidewalk. <br /> b) Hydro-modification standards are required when a new development or redevelopment <br /> project creates and replaces total impervious area of one acre or more. <br /> c) The Permit requires a proactive Diazinon pollutant reduction plan (aka Pesticide Plan) to <br /> reduce or substitute pesticide use with less toxic alternatives. <br /> d) The Permit requires complying with the Copper Pollutant Reduction Plan and the Mercury <br /> Pollutant Reduction Plan. <br /> 128. The following requirements shall be incorporated into the project: <br /> a) The project applicant or developer shall submit a final grading and drainage plan prepared <br /> by a licensed civil engineer depicting all final grades and on-site drainage control measures <br /> including bio-swales. Irrigated bio-swales shall be redesigned as needed to the satisfaction <br /> of the City Engineer to optimize the amount of the stormwater running off the paved surface <br /> that enters the bio-swale at its most upstream end. This plan shall be subject to the review <br /> and approval of the City Engineer prior to the issuance of any building permits. <br /> b) In addition to natural controls, the project applicant or developer shall install a structural <br /> control such as an oil/water separator, sand filter, or an approved equal in the parking lot to <br /> intercept and pre-treat stormwater prior to reaching the storm drain. The design, locations, <br /> and a schedule for maintaining the separator shall be submitted to the City Engineer/Chief <br /> Building Official for review and approval prior to issuance of building permits. The structural <br /> control shall be cleaned at least twice a year: once immediately prior to October 15 and <br /> once in January. <br /> c) The project applicant or developer shall submit sizing design criteria to treat stormwater <br /> runoff at the time of improvement plan submittal and an updated detailed copy of <br /> calculations with subsequent submittals. <br /> d) Landscaping shall be designed to minimize irrigation and runoff, promote surface infiltration <br /> where appropriate and acceptable to the project soils engineer, and minimize the use of <br /> fertilizers and pesticides that can contribute to stormwater pollution. <br /> • Structures shall be designed to prohibit the occurrence and entry of pests into buildings, <br /> thus minimizing the need for pesticides. <br /> • Where feasible, landscaping shall be designed and operated to treat stormwater runoff. <br /> In areas that provide detention of water, plants that are tolerant of saturated soil <br /> conditions and prolonged exposure to water shall be specified. Soil shall be amended <br /> as required. (See planting guideline by Alameda County Clean Water Program.) <br /> • Plant materials selected shall be appropriate to site specific characteristics such as soil <br /> type, topography, climate, amount and timing of sunlight, prevailing winds, rainfall, air <br /> movement, patterns of land use, ecological consistency, and plant interactions to ensure <br /> successful establishment. <br /> • Landscaping shall also comply with City of Pleasanton ordinances and policies regarding <br /> water conservation. <br /> 21 <br />