Reso PC15-01 PC Reso (3051 ) to Adopt Initial Study-Mitigated Negative Declaration - La Palma

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3.0 Environmental Impact Checklist a) Exceed wastewater treatment requirements of the applicable Regional Water Quality Control Board? e) Result in a determination by the wastewater treatment provider that serves or may serve the project that it does not have adequate capacity to serve the project's projected demand in addition to the provider's existing commitments? Less-than-Significant Impact.Wastewater treatment services in the project area are provided by the City of Redwood City under a Joint Power Authority with the Silicon Valley Clean Water (SVCW). SVCW operates the regional wastewater treatment plant located at the northeastern end of the Redwood Shores peninsula. The Redwood City Public Works Department operates and maintains the sanitary sewer collection system,including sewer mains and sewer lift stations, serving the City. SVCW's wastewater treatment plant has an operating capacity of 29 million gallons per day (mgd) for average dry weather flow (ADWF) and a capacity of 71 mgd for peak wet weather flow(PWWF) (City of Redwood City 2010a). Redwood City purchases capacity from SVCW and is allocated approximately 12.3 mgd ADWF and approximately 30.5 mgd PWWF (City of Redwood City 2010a). Wastewater treatment would not be needed during project construction.Portable toilet facilities would be provided for project construction crews. During the long-term occupancy of the homes, wastewater would be generated in a manner similar to the existing residential uses on-site. The project's implementation is anticipated to generate 3,051 gallons per day(gpd) of wastewater flow, as determined by the project's water demand, from the project's proposed 12 single-family homes and associated landscaping.This amount is not substantial and would not exceed the City's capacity to provide wastewater treatment services. The project applicant is required to pay sewer fees prior to the issuance of the project's Building Permit to address the connection of additional units to the City's system, and to pay SVCW for the treatment of the additional units. Implementation of the project would not exceed wastewater treatment requirements or capacity and impacts would be less than significant. b) Require or result in the construction of new water or wastewater treatment facilities or expansion of existing facilities,the construction of which could cause significant environmental effects? Less-than-Significant Impact with Mitigation Incorporated.As discussed in sections d)and e), the project would not exceed the City's wastewater treatment capacity or demand water in excess of the City's existing water resources during project construction or long-term occupancy of the homes. The existing residential uses on-site currently receive wastewater and water services and are connected to the City's wastewater and water systems. The project would not require the construction or expansion of new water or wastewater treatment facilities as the existing treatment facilities would have adequate capacity to service the project. However, the existing water and wastewater mains (both 6-inch mains) in KentfieId Avenue, to which the project would connect, are smaller than the current minimum water and wastewater main size allowed by the City's Engineering Standards. The existing mains would potentially La Palma Subdivision Project Final Initial Study/Mitigated Negative Declaration 61