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U.S.A. <br /> E (ON COMP/-1N.Y, ' <br /> ty <br /> ��j � ' I'f•��.lF x=11,`;F/ <br /> P.O.BOX 4032•CONCORD CA 94524.4032 <br /> MARKETING-DEPARTMENT •ENVIRONMENTAL ENGINEERING f �� <br /> DARIN L.'--ROUSE <br /> ENVIRONMENTAL ENGINEER <br /> (925)246-8768 <br /> (925)246-8798 FAX <br /> December 3, 199$ <br /> Mr.Michael Infurna . <br /> San Joaquin County Public Health Services , <br /> Environmental Health Division <br /> 304 East Weber Avenue;Thlyd Floor <br /> Stockton,California 95201 <br /> 'RE: Exxon RAS 97-01..37/1605 S.El Dorado St.,Stockton,California <br /> Dear Mr Infurna: <br /> Attached for your review and comment is a copy of the Work Plan for Confirmation Soil Borings in Support of a <br /> Request for Case Closure,for the above-referenced Exxon site. The report,prepared by EA.Enginecring, Science, <br /> and Technology(EA)of Lafayette,California,discusses the proposed confirmatory sampling activities, <br /> Previous investigations at the site indicated that petroleum hydrocarbons were detected up.to a maximum depth of <br /> 38.5 feet below ground surface(bgs)arid-deeper samples up to.a depth of 45.5feet bgs were non=detect for target <br /> analytes. Based on these findings,soil and groundwater samples will not be-collected beyond-the first encountered <br /> water at approximately 46'feet bgs: Soil and groundwater samples will not be collected down to 65.feet bgs,the <br /> historic drought level'of 1977-78.. Groundwater level query results from the California Department of Water <br /> Resources for nearby well 01N06E14Q03M are attached-for your information, <br /> In'accordance with 40 CFR Section 280.67, irimplementation.of the workplan.will begin sixty days upon receipt by the <br /> San Joaquin County Public Health Services,unless Exxon receives written directions to do otherwise. <br /> lfyou have'. questions or comments,please contact meat(925)246-8768. <br /> Sincer <br /> Da i .Rouse <br /> Environmental Engineer <br /> DLR/tjm <br /> Attachment: EA Work Plan dated October 1998 <br /> cc: w/attachment: <br /> Ms. Patricia Anderson-Central Valley RWQCB <br /> Mr. Karmjit Greywal-Property Owner <br /> w/o attachment: <br /> Ms.Christa Marting-EA <br /> A DIVISION OF EXXON CORPORATION - <br /> aecr=o- <br /> .. <br />