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PUBLIC HEALTH SERv'i"CES pPpU!N <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION w Z< <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer : <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 ' i c+t; lii�� <br /> 209/468-3420 G <br /> ALEX PEREZ APR 071997 <br /> SHELL OIL COMPANY <br /> PO BOX 4023 <br /> CONCORD CA 94524 <br /> Re Shell Service Station Site Code: 1070 <br /> 2575 Country Club <br /> Stockton CA 95204 <br /> San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) has <br /> completed review of the "Monitoring Well Installation Report" dated April 3, 1997 that was <br /> prepared by Enviros. PHS/EHD has the following comments for your consideration and <br /> response. <br /> Please note that based on the vertical extent of soil contamination evidenced to 46.5 feet below <br /> ground surface (bgs) it will be necessary to install a deeper monitoring well to verify that the <br /> deeper zone of groundwater has not been impacted by the release and to complete the <br /> assessment. Also, evaluation of various remedial alternatives should be initiated, because after <br /> the assessment is complete a corrective action plan pursuant to the Underground Storage Tank <br /> Regulations will be required. <br /> The report included a recommendation to install an additional well southwest of MW8. Please <br /> proceed with obtaining a Caltrans encroachment permit. Once the Caltrans permit is obtained, <br /> please submit a PHS/EHD drilling permit application and $89 fee. Please consider installing the <br /> deeper well during the same mobilization event. <br /> If you have any questions, please contact me at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Mary Meays, Senior REHS Margaret Lagorio, REHS <br /> Site Mitigation Unit Supervisor <br /> cc: Elizabeth Thayer, Central Valley Regional Water Quality Control Board <br /> cc: Joe Neely, Enviros <br /> A Division of San Joaquin County Health Care Services <br />