Reso PC15-09 PC Reso (3108) Recommending Approval of Tentative Parcel Map - 815 Hamilton

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d . Flow-through Planters o The use of flow through planters for stormwater treatment has been approved in concept; however, the flow through planter section shall be designed in conformance with the San Mateo County guidelines found in the C. 3 Technical Guidance Manual . i . Soil media within the bioinfiltration measure shall consist of 18 inches of biotreatment soil consistent with the Attachment L of the MRP. ii . Biotreatment soil mix for biotreatment measures shall have a minimum percolation rate of 5 inches per hour and a maximum percolation rate of 10 inches per hour, and shall be in conformance with Attachment L of the MRP, which is included in Appendix K of the C. 3 Technical Guidance. iii . Design of biotreatment measures shall be consistent with technical guidance for the applicable type of biotreatment measure provided in Chapter 6 of the C.3 Technical Guidance. e. No Dumping — All drain inlets shall be clearly marked with the words "No Dumping ! Flows to Bay, " or equivalent using thermoplastic material or a plaque. f. Non-LID o Design of non-LID treatment measures shall be consistent with applicable technical guidance in Chapter 6 of the C.3 Technical Guidance. g . Use of Copper - Projects with architectural copper should , if possible, purchase copper materials that have been pre-patinated at the factory. Whether patination is done offsite or onsite, applicant should consider coating the copper materials with an impervious coating that prevents further corrosion and runoff. If patination is done on-site , implement one or more of the following: i . Discharge the rinse water to landscaping . Ensure that the rinse water does not flow to the street or storm drain . Block off storm drain inlet if needed . ii . Collect rinse water in a tank and pump to the sanitary sewer. Contact your local sanitary sewer agency before discharging to the sanitary sewer. iii . Collect the rinse water in a tank and haul off-site for proper disposal . 55 . Stormwater Management Plan (SWMP) — The applicant shall prepare a SWMP that includes, at a minimum , exhibit(s) showing drainage areas and location of Low Impact Development ( LID) treatment measures; total project site area and total area of land disturbed ; total new and/or replaced impervious area ; treatment measures and hydraulic sizing calculations; a listing of source control and site design measures to be implemented at the site; saturated hydraulic conductivity rate(s) at relevant locations or hydrologic soil type (A, B , C or D) and source of information ; elevation of high seasonal groundwater table; and a brief summary of how the project is complying with Provision C.3 of the MRP . Street Infrastructure Improvements 56. Streetlights — The applicant shall submit a final streetlight plan for review by the City as part of the building permit application . [SDR][ENGINEERING] ATTY/RES0.3108/PC RESO RECOMMENDING APPROVAL OF TENTATIVE PARCEL MAP — 815 HAMILTON REV: 06-19-15 VR Page 14 of 21