3A Public Hearing 2007 1119 - Laserfiche WebLink

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W. The Applicant shall comply with the provisions of the City's Grading Ordinance and the Urban Runoff Clean Water Program. The City requires a grading permit any time more than fifty (50) cubic yards of material is moved or more than 5,000 square feet is disturbed. The Ordinance requires that an erosion control and sediment plan be prepared, submitted and approved by the City prior to issuance of a Grading Permit. X. The Developer shall provide landscaped backyards to reduce the impermeable area and to provide a landscape area for filtering at least ten percent of the roof runoff. The landscaping shall use materials such as decking, pavers on sand base, lawn or other permeable or filtering materials. The landscape area shall equal at least 10 percent of the footprint area of a housing unit. Y. Stormwater from this site requires treatment. Numeric -sized facilities should be provided for storm drainage. Urban Runoff Clean Water Program requires that all runoff be treated to remove sediment and water borne pollutants prior to discharge into a public facility. Examples of control measures include, but are not limited to: routing of pavement and roof runoff through vegetated swales, planter boxes, vegetated filter strips or landscaped areas in lieu of direct hydraulic connection to the storm drain system; structural control measures, such as bioretention areas, subsurface media filters, manufactured treatment controls or other methods that may be proposed by the applicant and approved by the City Engineer to intercept and pretreat storm water prior to discharging to the storm drain system. Examples of appropriate site design features, source control measures and post -construction stormwater treatment controls can be found on the Alameda Countywide Clean Water Program (ACCWP) website: www. c leanwaterpro gram. org. Z. Runoff from trash enclosures, recycling areas, or similar facilities shall not discharge to the storm drain system. Trash enclosure areas shall be covered and designed to avoid run-on or run-off to the trash enclosure area. No drains shall be installed in the trash enclosure area. AA. Sidewalks and parking lots shall be swept regularly to minimize the accumulation of litter and debris. Debris resulting from pressure washing shall be trapped and collected to prevent entry into the storm drain system. Wash water containing any soap, cleaning agent or degreaser shall not be discharged to the storm drain and shall be collected and discharged to the sanitary sewer or collected and treated prior to being lawfully disposed. BB. All on-site storm drains must be inspected and cleaned at least once a year immediately prior to the rainy season. Additional cleaning may be required by the City Engineer. CC. Roof drains shall discharge to an unpaved area wherever practicable. PLN2007-00050 Page 6 of 12 Recommended Conditions of Approval October 11, 2007