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iv. Water conservation techniques to promote surface infiltration. <br /> e) Trash dumpsters and recycling containers shall be in an enclosed and roofed area to <br /> minimize water flowing in and from the area and to contain litter and trash to <br /> minimize disbursement by the wind or runoff. These areas shall not drain to the <br /> storm drain system, but to the sanitary sewer system. An area drain shall be <br /> installed in the enclosure area with a structural control such as an oil/water separator <br /> or sand filter. No other area shall drain into the trash enclosure; a ridge or a berm <br /> shall be constructed to prevent such drainage if found necessary by the City <br /> Engineer/Chief Building Official. A sign shall be posted prohibiting the dumping of <br /> hazardous materials into the sanitary sewer. The project developer shall notify the <br /> Dublin San Ramon Services District of the sanitary sewer connection and provide <br /> written verification of such notification to the City Engineer/Chief Building Official <br /> prior to the installation of the connection. <br /> f) All paved outdoor storage areas shall be designed to minimize pollutant runoff. Bulk <br /> materials stored outdoors that may contribute to the pollution of stormwater runoff <br /> must be covered as deemed appropriate by the City Engineer/Chief Building Official. <br /> g) All metal roofs, gutters, and downspouts shall be finished with rust-inhibitive <br /> finish/paint as determined by the Chief Building Official. <br /> h) All projects using architectural copper roofing, gutters, downspouts, etc., shall utilize <br /> the following Best Management Practices for use and maintenance: <br /> I. During installation, copper material shall be pre-patinated at the factory. If <br /> patination is done on-site; collect the rinse water in a tank and haul off-site for <br /> disposal. With prior authorization from Dublin San Ramon Services District <br /> (DSRSD), you may collect the rinse water in a tank and discharge to the <br /> sanitary sewer. Optionally, consider coating the copper materials with a clear <br /> coating that prevents further corrosion and stormwater pollution. The clear <br /> coating, if utilized, shall be reapplied (as recommended by the coating <br /> manufacturer) to maintain its efficacy. <br /> II. During maintenance, the following applies during washing and patination: <br /> i. Minimize washing of architectural copper as it damages the patina <br /> and any protective coating. <br /> ii. Block all storm drain inlets downstream of the wash. <br /> iii. collect in a tank and dispose off-site, or discharge the wash water to <br /> the sanitary sewer (with prior authorization from DSRSD). <br /> III. During re-patination, collect the rinse water in a tank and dispose off-site or <br /> discharge to sewer(with prior authorization from DSRSD) . <br /> i) Roof drains shall drain away from the building foundation. Stormwater flow shall <br /> drain to a landscaped area or to an unpaved area wherever practicable as <br /> determined by the City Engineer/Chief Building Official. <br /> j) There shall be no direct roof leaders connected to the street gutter/parking lot or <br /> storm drain system, unless otherwise approved by the City engineer. <br /> 34 <br />