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c. The project developer shall submit sizing design criteria to treat stormwater runoff and for hydromodification, if required, at the time of PUD plan submittal and an updated detailed copy of calculations with subsequent 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. I. Structures shall be designed to prohibit the occurrence and entry of pests into buildings, thus minimizing the need for pesticides. II. 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 soil conditions and prolonged exposure to water shall be specified. Soil shall be amended as required. (See planting guide line by Alameda County Clean Water Program.) III. Plant materials selected shall be appropriate to site specific characteristics such as soil type, topography, climate, amount and timing of sunlight, prevailing winds, rainfall, air movement, patterns of land use, ecological consistency and plant interactions to ensure successful establishment. IV. Landscaping shall also comply with City of Pleasanton ordinances and policies regarding water conservation. e. Roof drains shall discharge and drain away from the building foundation. Ten percent of the stormwater flow shall drain to landscaped area or to an unpaved area wherever practicable. B. Construction Requirements The Construction General Permit's construction requirements include, but are not limited to, the following: Construction activities (including other land-disturbing activities) that disturb one acre or more (including smaller sites that are part of a larger common plan of development) are regulated under the NPDES stormwater program. Operators of regulated construction sites are required to develop and implement a Stormwater Pollution Prevention Plan and to obtain a Construction General Permit (NOI) from the State Water Resources Control Board to discharge stormwater: http://www.waterboards.ca.gov/water issues/programs/stormwater/docs/finalconstpermi t.pdf Stormwater 1. The project developer shall submit a Stormwater Pollution Prevention Plan (SWPPP) for review by the City Engineer/Chief Building Official prior to issuance of building or engineering permits. A reviewed copy of the SWPPP shall be available at the project site until engineering and building permits have been signed off by the inspection departments and all work is complete. A site specific SWPPP must be combined with proper and timely installation of the BMPs, thorough and frequent inspections, Case No. PUD-115, 11249 Dublin Canyon Planning Commission Page 21 of 24