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g. <br /> �M Appendix A. Responsiveness Summary <br /> Martin Metals Finishing Inc. (Former) <br /> Stockton, California <br /> Response to Department of Toxic Substances Control (DTSC) Comments for CDIM's Preliminary <br /> Endangerment Assessment (PEA) and Supplemental Site Investigation (SSI)Work Plan (Work Plan), <br /> Martin Metal Finishing Inc. Stockton California, dated July 25, 2022. <br /> Comment I Response <br /> Daniel Ochoa, Engineering Geologist, Engineering and Special Projects Office, Site Mitigation and <br /> Restoration Program-DTSC Specific Comments <br /> Due to the limited and outdated data in the PEA, CDIM drafted a PEA Work Plan in response to this <br /> DTSC recommends that the submitted PEA and SSI comment. <br /> Work Plan be incorporated into a PEA work plan. <br /> The PEA work plan shall include sampling designed <br /> to reflect the current site condition, i.e., determining <br /> the type and general extent of contamination at the <br /> Site. The validity and quality of those historical data, <br /> if used in the PEA, should be judged based on the <br /> current DTSC's sampling and data quality <br /> standards. The PEA work plan should also <br /> document screening levels and methodologies to be <br /> used to evaluate human health risks. The sampling <br /> techniques provided in the SSI Work Plan shall be <br /> incorporated in the PEA. <br /> A health and safety plan addressing health and The PEA Work Plan includes a Quality <br /> safety issues and safe work practices; and a quality Assurance/Quality Control Plan (Appendix C) and Site <br /> assurance/quality control plan to produce data of Health and Safety Plan (Appendix D). <br /> known quality shall be included in the PEA. <br /> The attached comments shall be incorporated into Comment acknowledged. Attached comments have <br /> the PEA for DTSC review and approval. been incorporated into the PEA Work Plan. <br /> A PEA Report shall be submitted after completion of Comment acknowledged. <br /> data collection from the PEA work plan. This report <br /> will document whether a release has occurred, or <br /> threatened release exists, the threat the Site poses <br /> to human health and the environment, and whether <br /> further action is necessary. <br /> If further action is necessary, an SSI work plan will Comment acknowledged. <br /> be submitted describing activities proposed to <br /> further characterize soil, soil gas, surface water <br /> and/or groundwater. The SSI work plan shall also <br /> include a health and safety plan, quality <br /> assurance/quality control plan, sampling plan, and <br /> implementation schedule. <br /> Page A-1 <br />