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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY =10 ` c0 <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M. D , M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor a P. O Box 388 o Stockton, CA 95201-0388 c4LrF�ata�P <br /> 2091468-3420 <br /> caED <br /> KOBERSTEINcl <br /> � <br /> MONTGOMERY WARD & COMPANY INC <br /> 1331 SO HARBOR BLVD <br /> FULLERTON CA 92632 M&S AUG 0 91996 <br /> RE Montgomery Wards Auto CenteAUG 2 9 1 96 SITE CODE 2163 <br /> 5400 Pacific Ave <br /> -Stockton, Ca 95207 �NVIRONMEWAI- AUDI-1 <br /> I <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD) <br /> Ihas reviewed the "Soil Vapor Extraction Pilot Study Work Plan" dated August 5, 1996, <br /> as submitted by Environmental Audit, Inc , and has the following comments <br /> PHS-EHD appreciates your interest and desire to evaluate a remediation system for <br /> this site Soil vapor extraction (SVE) has had positive results on sites in this area in the <br /> past Typically, sites that have had soil contaminants removed by this method have <br /> gone on to show that the potential impact to groundwater in the area has also been <br /> reduced These sites, for the most part, have conducted SVE where the groundwater <br /> was only threatened or slightly impacted On sites such as yours, where considerable <br /> groundwater contamination is already known to exist, additional mitigating activities will <br /> need to be addressed <br /> Since December, 1995, groundwater at this site has risen above the monitoring well <br /> screened interval for MW-1 and MW-2 These two monitoring wells are located in the <br /> areas your current proposal will be targeting Soil data previously compiled indicates <br /> that soil contamination exists at only shallow depths for the island area (MW-2), but <br /> I exists at both shallow depths and at deeper levels at the former underground tank <br /> (1 1(,Tlvroa AAW-11 <br /> .1 I u1� " kwarr I! <br /> High levels of groundwater contamination continue to exist at this site even after the <br /> UGT's have been removed PHS-EHD has concluded that contaminated soil, still in <br /> place at and below the current groundwater interface, is impacting and degrading the <br /> groundwater / <br /> A Division of San Joaquin County Health Care Sen ices <br />