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