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drain to the storm drain system, but to the sanitary sewer system. An area <br /> drain shall be installed in the enclosure area with a structural control such as <br /> an oil/water separator or sand filter. No other area shall drain into the trash <br /> enclosure; a ridge or a berm shall be constructed to prevent such drainage if <br /> found necessary by the City Engineer/Chief Building Official. A sign shall be <br /> posted prohibiting the dumping of hazardous materials into the sanitary <br /> sewer. The project developer/applicant shall notify the Dublin San Ramon <br /> Services District of the sanitary sewer connection and provide written <br /> verification of such notification to the City Engineer/Chief Building Official prior <br /> to the installation of the connection. <br /> g. All paved outdoor storage areas shall be designed to minimize pollutant <br /> runoff. Bulk materials stored outdoors that may contribute to the pollution of <br /> stormwater runoff must be covered as deemed appropriate by the City <br /> Engineer/Chief Building Official. <br /> h. All metal roofs, gutters, and downspouts shall be finished with rust-inhibitive <br /> finish/paint as determined by the Chief Building Official. <br /> i. All projects using architectural copper roofing, gutters, downspouts, etc., shall <br /> utilize the following Best Management Practices for use and maintenance: <br /> a. During installation, copper material shall be pre-patinated at the <br /> factory. If patination is done on-site; collect the rinse water in a tank <br /> and haul off-site for disposal. With prior authorization from Dublin San <br /> Ramon Services District (DSRSD), you may collect the rinse water in a <br /> tank and discharge to the sanitary sewer. Optionally, consider coating <br /> the copper materials with a clear coating that prevents further <br /> corrosion and stormwater pollution. The clear coating, if utilized, shall <br /> be reapplied (as recommended by the coating manufacturer) to <br /> maintain its efficacy. <br /> b. During maintenance, the following applies during washing and <br /> patination: <br /> i. Minimize washing of architectural copper as it damages the <br /> patina 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 <br /> water to the sanitary sewer (with prior authorization from <br /> DSRSD). <br /> c. During re-patination, collect the rinse water in a tank and dispose off- <br /> site or discharge to sewer (with prior authorization from DSRSD) . <br /> j. Roof drains shall drain away from the building foundation. Ten percent of the <br /> stormwater flow shall drain to a landscaped area or to an unpaved area <br /> wherever practicable as determined by the City Engineer/Chief Building <br /> Official. <br /> 3. The project developer/applicant shall install trash capture devices within the <br /> project's storm drain inlets or storm drain piping to capture trash within the <br /> Page 13 of 22 <br />