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7.A. - Page 32 ATfACHMENT 1 Mitigation: Mitigation 12-1. The applicant shall implement the Site Management Plan (SMP) attached as an appendix to the Draft EIR. At such times as the exact locations and details of sensitive uses such as child care, medical clinics, and publicly accessible open space are identified, the applicant shall supplement the SMP to assess any risks to those uses from existing hazardous materials on the development site and shall identify any treatment measures required to ensure that risks to users remain below regulatory limits. Finding: Implementation of Mitigation 12-1 would reduce the potential impact of project- related exposure to existing soil and groundwater contamination to a less-than- significant level. Facts in Support of Finding: Implementation of Mitigation 12-1 would ensure that the Site Management Plan (SMP) included in Draft EIR appendix 21.6, as well as a Health and Safety Plan (HASP), are implemented during all project construction. Furthermore, once the precise locations and operations of proposed sensitive receptors--such as child care, medical clinics, and recreation--have been determined, additional investigations would be required to evaluate the presence and levels of any groundwater or soil vapor contamination, pursuant to applicable regulatory requirements. The mitigation for sensitive uses must meet residential screening criteria as defined by the appropriate regulatory agencies (e.g., RWQCB, DTSC, SMCHSA, BAAQMD, CaIOSHA). These facts are described in Draft EIR chapter 12 (Hazards and Hazardous Materials) on pages 12-1 though 12-24, and appendix 21.6 (Site Management Plan), which are hereby incorporated by reference. Noise Impact: Impact 13-1: Potential Exposure of Proposed Child Care Facility to Noise Levels Exceeding Standards. The Precise Plan includes a provision for a proposed child care center. The center's children, employees, and visitors could be exposed to various existing and projected noise sources, including U.S. 101 traffic. The compatibility of the child care land use with the existing and projected noise environment has been evaluated based on the Redwood City Noise Guidelines for Land Use Planning (see Draft EIR Table 13.4). New educational (e.g., child care) development is considered "satisfactory" in noise environments of less than 55 dBA CNEL. Both existing and projected noise levels throughout much of the Precise Plan area, especially in the vicinity of U.S. 101, exceed 55 dBA CNEL, thereby potentially exposing the proposed child care center to noise levels exceeding the "normally acceptable" threshold. Mitigation: Mitigation 13-1. Location-specific noise studies consistent with the requirements of the State Building Code (SBC) shall be conducted for the proposed child care use to identify appropriate noise reduction measures to be included in project final design. The noise study must be submitted to and approved by the Redwood City Community Development Department prior to City issuance of the child care center building permit. Identified noise insulation measures may include: ATTY/RES0.2901/STANFORD EIR CERTIFICATION REV:08-29-13 VR Page 22 of 56