Laserfiche WebLink
be redesigned as needed to the satisfaction of the City Engineer to <br /> optimize the amount of the stormwater running off the paved surface that <br /> enters the bio-swale at its most upstream end. This plan shall be subject <br /> to the review and approval of the City Engineer prior to the issuance of <br /> any building permits. <br /> b) In addition to natural controls the project developer may be required to <br /> install a structural control, such as an oil/water separator, sand filter, or <br /> approved equal (on-site) to intercept and pre-treat stormwater prior to <br /> reaching the storm drain. The design, locations, and a schedule for <br /> maintaining the separator shall be submitted to the City Engineer/Chief <br /> Building Official for review and approval prior to issuance of building <br /> permits. The structural control shall be cleaned at least twice a year: <br /> once immediately prior to October 15 and once in January. <br /> c) The project developer shall submit sizing design criteria to treat <br /> stormwater runoff and for hydromodification, if required, at the time of <br /> PUD plan submittal and an updated detailed copy of calculations with <br /> subsequent submittals. <br /> d) Landscaping shall be designed to minimize irrigation and runoff, promote <br /> surface infiltration where appropriate and acceptable to the project soils <br /> engineer, and minimize the use of fertilizers and pesticides that can <br /> contribute to stormwater pollution. <br /> I. Structures shall be designed to prohibit the occurrence and entry of <br /> pests into buildings, thus minimizing the need for pesticides. <br /> II. Where feasible, landscaping shall be designed and operated to treat <br /> stormwater runoff. In areas that provide detention of water, plants that <br /> are tolerant of saturated soil conditions and prolonged exposure to <br /> water shall be specified. Soil shall be amended as required. (See <br /> planting guide line by Alameda County Clean Water Program.) <br /> III. Plant materials selected shall be appropriate to site specific <br /> characteristics such as soil type, topography, climate, amount and <br /> timing of sunlight, prevailing winds, rainfall, air movement, patterns of <br /> land use, ecological consistency and plant interactions to ensure <br /> successful establishment. <br /> IV. Landscaping shall also comply with City of Pleasanton ordinances and <br /> policies regarding water conservation. <br /> e) Roof drains shall discharge and drain away from the building foundation. <br /> Ten percent of the stormwater flow shall drain to landscaped area or to an <br /> unpaved area wherever practicable. <br /> Page 13 of 17 <br />