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PUBLIC"-HEALTH SERVICES <br /> SAN JOAQUIN COUNTY �: a <br /> ENVIRONMENTAL HEALTH DIVISION ` <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer V <br /> ��lFORt►� <br /> 445 N. San Joaquin Street • P.O. Box 388 • Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> BOB VASQUEZ C (OPY <br /> SOUTHLAND CORPORATION <br /> 5820 STONERIDGE MALL ROAD SUITE 310 MAY 2 5 1994 <br /> PLEASANTON CA 94588 <br /> RE: 7-Eleven Store #2243-20304 SITE CODE: 1409 <br /> 455 West Grant Line Road <br /> Tracy CA 95375 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has completed review of the "WorkPlan to Destroy Monitoring Wells" dated May 12, <br /> 1994 and prepared by Groundwater Technology. PHS/EHD has the following comments <br /> for your consideration. <br /> The work plan described how monitoring wells, MW12, MW13, and MW14 are to be <br /> destroyed. The plan indicated that the wells will be pressure grouted using <br /> cement/bentonite/sand slurry. The top five feet of casing will then be drilled out and <br /> filled with clean imported material. PHS/EHD does not allow a sand slurry to be used <br /> for pressure grouted monitoring well destructions. Furthermore, the grout must extend <br /> to three feet below grade. <br /> Please be informed that should the contaminant plume migrate in the area these wells <br /> are located, PHS/EHD will require the installation of replacement wells. <br /> Field work may commence upon issuance of a well destruction permit. If you have any <br /> questions, comments, or wish to schedule a site inspection, please contact Mary Meays, <br /> Senior REHS, of my staff at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> 4"Uae <br /> Mary Meays, Senior REHS Diane M. Hinson, REHS <br /> Site Mitigation Unit Supervisor <br /> MW455GL <br /> cc: Elizabeth Thayer, CVRWQCB <br /> cc: Al Ellis, Rishwain, Hakeem and Ellis <br /> cc: Brian Garber, Groundwater Technology <br />` A Division or San Joaquin County Health Care Services <br />