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PUBLIC HEAL <br /> TH SERVICES a� <br /> �o <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION "` <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue,Third Floor • Stockton, CA 95202 �cleo"a+ <br /> 209/468-3420 <br /> PETER NEMIEC <br /> FILE COPY <br /> ASSISTANT COUNSEL <br /> UNOCAL CORPORATION <br /> DIVERSIFIED BUSINESS GROUP AUG 2 6 1998 <br /> 376 VALENCIA AVENUE <br /> BREA CA 92823 <br /> RE: UNOCAL SITE CODE: 1181 <br /> 437 E. Miner Avenue <br /> Stockton, CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD)has reviewed <br /> the response letter dated July 24, 1998, from ARCADIS Geraghty&Miller, Inc. on behalf of UNOCAL <br /> for the above referenced site. <br /> Current water level is above the screened interval of monitoring wells U1, U2, U3, U4, U5, U6, U7, and <br /> U8. The water level has been above the screened interval of monitoring wells U4, U5, U6, U7, and U8 <br /> since February 1997. Vapor extraction well UV1 does have screen above and below first water but is <br /> not being sampled. Therefore, current water sample results may not reflect the contaminant levels of <br /> first water. PHS/EHD does not agree that the investigation proposed will complete the soil and water <br /> investigation. It will provide information to better evaluate the lateral and vertical extent of the <br /> contamination. <br /> A site map showing the new location of the proposed boring was not provided with the July 24, 1998, <br /> letter. PHS/EHD verbally requested this site map from ARCADIS Geraghty & Miller and they agreed <br /> to submit the site map to our agency. Contingent on agreement with the location of the proposed <br /> boring, the work proposed in the work plan dated May 26, 1998, with the amendments agreed to in the <br /> July 24, 1998, letter is approved. Please submit a PHS/EHD well permit application, an $89 permit fee <br /> and a copy of the encroachment permit from the City of Stockton. After the well permit has been <br /> issued the work can be scheduled with PHS/EHD staff so the work can be witnessed. <br /> If you have any questions contact me at(209)468-3449. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> U <br /> Margaret Lagodo, Supervising REHS <br /> Site Mitigation Unit <br /> c: CVRWQCB-Mark List <br /> ARCADIS Geraghty&Miller-Dr. Stephen Cullen <br /> UNOCAL-Bob Boust <br /> SWRCB- Lon Casias <br /> SJCADA- David Irey <br /> A Division of San Joaquin County Health Cam Services <br />