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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Dolma F.Horan,R.E.H.S. CStir Saperrivux <br /> r c304 East Weber Avenue. Third Floor Carl Borgman,R.E.11.S. <br /> Direcmr <br /> .; Mike Huggins,R.E.H.S..R.0 I. <br /> Al Olsen,R.E.H.S. Stockton. California 95202-2708 7{R'� = Douglas W.Wilson.R.L-.FLS. <br /> •\c9\tFJ% Prngrmnafnn°•gt' <br /> Telephone: (209) 468-3420 MamaretLawrio.R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. - RnbertMcClellon. R.E.H.S. <br /> Program Manager Fas: (_09)464-01=8 <br /> Mark Barcellos.R.E.H.S.RECEIVED <br /> D CHARLES SKOBRAK h i' Q <br /> 9947 EAST HIGHWAY 26 DEC 9 I) 2004 4 <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 re� iewed Well <br /> Installation and Feasibility Stud Work Plan --,November?004 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 comer 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,REHS7 <br /> Nuel C.Henderson,Jr.,RG <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> cc: Daniel W. Kalmbach, AGE <br /> James L.L. Barton, CVRWQCB <br />