SITE INFORMATION AND CORRESPONDENCE

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Rn 77-CFl1 \YFD C 0109icat7 ck�ics lac. OCT 2 8 2003 11017°Street .EALTH Modesto,Califoml 95354 an';ACES (209)522-4119/Fax(2119)522-4227 October 20, 2003 Project No.: 507.3 Project Name:J.M. Equip. (Charter Way) Technical Review Team State Water Resource Control Board 2014 T Street, Suite 130 P.O. Box 944212 Sacramento, CA 942 4-2120 RE: Cost Estimate: In-Situ Remediation Pilot Test Location: J.M. Equipment, 1245 W. Charter Way, Stockton, CA Dear Technical Reviever: Geological Technics nc. has prepared the following Cost Pre-Approval package for an In- Situ Remediation Pilc t Test to address the residual contamination at the above site. Summary of Corree ve Action Work J.M. Equipment Com any received a letter on November 1, 1996 from Mr. Joel Weiss of the California Regional Nater Quality Control Board - Central Valley Region. The letter referenced a report r -epared by William J. Hunter & Associates for Independent trucking Facility located east of J.M. Equipment at 1145 West Charter Way, Stockton, CA. This report dated Octob 21, 1996, titled Interim Report Covering Soil and Groundwater Investigation, include information from MW-9, a groundwater monitoring well placed on J. M. Equipment propei ty for the purposes of defining the groundwater plume in an upgradient direction. . Historical research as performed to determine possible sources of the gasoline range petroleum hydrocar ons found in MW-9. It was discovered that years ago this facility contained two under gound storage tanks (UST's) and two aboveground fuel storage tanks (AST's). These tank 3 contained both gasoline and diesel. The preliminary data from MW-9 suggests that only the gasoline tanks released fuel. Facility photographs document that these tanks were located near the southeast comer of the Hesston Shop. Cow ty assessor records show that this shop was constructed in 1988 and to the best of facilityemployees' recollection; the UST's were removed in the early 1980's. For a period of seve 7al years J.M. Equipment used just AST's. The UST's were in the size range of 500 to 1,00 gallons and the AST's appear to be less then 500 gallons each. Prior to the early 19 0's Crandle operated a John Deere facility on this property. In the early 1970's Quimby purc ased the property from Crandle and operated J.M. Equipment which is an equipment sales end service business. In 1991 the property was transferred from Quimby to Geo Corp. App eptly the tanks were installed during the time Quimby operated a John Deer facility and J. . Equipment continued to operate them until they were removed.