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ENVIRONMENTAL HEALTH DEPARTMENT <br /> P°Ulry <br /> SAN JOAQUIN COUNTY <br /> e: A Donna K. Heran. R.E.H.S. Unit Snpen•isorc <br /> " <br /> Director 304 East Weber Avenue. Third Floor Carl Bergman. R.E H.S. <br /> AlOlsen,R.E.H.S. Mike Huggins. R.E.H.S.. R.D.I. <br /> Stockton, California 95202-2708 <br /> gCi.,_. .tiw Program alanugrr Douglas W.Wilson. R.E.H.S.FOR Laurie A.Cotulla.R.E.H.S. Telephone: (209) 468-3420 Margaret Lagorio. RH.S. <br /> Program d-Iam;ge r Fax: (209) 464-0138 Robert McClellon.R.E.H.S. <br /> Mark Barcellos. R.EH.S. <br /> D CHARLES SKOBRAK <br /> 9947 EAST HIGHWAY 26 <br /> STOCKTON CA 95215 <br /> RE: Larry's Auto SITE CODE 1122 <br /> 308 North Grant Street RO: 194 <br /> Stockton, CA 95202 <br /> San Joaquin County Environmental Health Department (EHD) has reviewed Well <br /> Installation and Feasibility Study Work Plan —November 2004 dated November 19, 2004, <br /> and prepared by Advanced GeoEnvironmental, Inc. (AGE) for the above-referenced site. <br /> This work plan proposes to install one groundwater extraction well to fifty feet below <br /> surface grade (bsg) and perform a groundwater aquifer extraction pilot test for interim <br /> remediation at this site. <br /> EHD approves the installation of the extraction well to be located east of the former 1,000- <br /> gallon gasoline tank located at the northwest corner of this site and the feasibility pilot test. <br /> Instead of collecting soil samples at five-foot intervals, EHD recommends obtaining <br /> continuous core through the intervals of interest for lithological evaluation to optimize <br /> screen placement. EHD also recommends that an additional extraction well be installed <br /> adjacent to the first extraction well and screened between 58 and 73 feet bsg since there <br /> appears to be a sand layer between 60 and 70 feet bsg. EHD suggests that you perform an <br /> appropriate pumping test for this extraction well, also. <br /> Please submit an addendum to the work plan to EHD by February 3, 2005, that includes the <br /> installation of a second extraction well to a total depth of 73 feet bsg. <br /> If you have any questions,please contact Vicki McCartney at(209) 468-3456. <br /> Donna Heran,REHS, Director <br /> Environmental Health Department <br /> Vicki McCartney, REHS 4 Nuel C. Henderson, Jr., RG <br /> LOP/Site Mitigation Unit IV V LOP/Site Mitigation Unit IV <br /> cc: Daniel W. Kalmbach, AGE <br /> James L.L. Barton, CVRWQCB <br />