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EarthTech 695 River Oaks Parkway P 408.232.2800 <br /> San Jose,CA 95134 F 408.232.2801 <br /> ATyco International Ltd.company www.earthtech.com <br /> Project No. 78676.09 <br /> November 12, 2004 <br /> Ms.Violeta Mislang <br /> California Environmental Protection Agency <br /> Department of Toxic Substances Control <br /> State Regulatory Programs Division <br /> Southern California Branch <br /> 5796 Corporate Avenue <br /> Cypress, CA 90630 <br /> Subject: 1950 West Fremont Street, Stockton,California(Docket SPRD 02/03 SCC-4288) <br /> Final PEA Work Plan <br /> Dear Ms. Mislang: <br /> On behalf of Tyco Electronics Corporation (Tyco), Earth Tech is pleased to provide the California <br /> Environmental Protection Agency Department of Toxic Substances Control (DTSC) with the Final <br /> Preliminary Endangerment Assessment Work Plan(Final Work Plan). <br /> The Final Work Plan incorporates the revisions according to the changes requested in the DTSC's letter <br /> dated October 5, 2004, and also per our discussions and electronic mail messages October 25 through <br /> October 29, 2004. The highlights of the revisions are summarized below. <br /> • Based on our discussion on October 26, 2004, DTSC has concurred on allowing Tyco to conduct <br /> the VOC investigation for the subject facility in two phases.The first phase activities will focus on <br /> sampling and analysis for VOCs in soil and groundwater beneath the site. If VOCs are not <br /> detected, no further VOCs investigation will be required. Based on the data, Soil gas survey for <br /> VOCs may be warranted. <br /> • As agreed upon in our electronic mail messages dated October 27 and October 28, 2004, we have <br /> changed the term "Conceptual Site Model" to "Preliminary Conceptual Site Model" and kept the <br /> relevant section in the Work Plan since it is consistent with the PEA Guidance document and <br /> establishes a rational basis for the sampling strategy. <br /> -- • Per your request, proposed site-specific cleanup goals and the related risk assessment calculations <br /> were removed from the Final Work Plan. <br /> • As agreed upon in your electronic message dated October 28, 2004, we have used the term <br /> "Preliminary Chemicals of Concern"and kept the section in the Work Plan. <br /> • The additional sampling points and analyses requested by DTSC are included in Table 9. As per <br /> our discussions, some of the analytical suites have been staggered among close-by sampling <br />