SITE INFORMATION AND CORRESPONDENCE

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Updated: 10/10/2002 REMEDIAL OVERSIGHT PROGRAM Report#: 7540 r Printed: 10/10/2002 SITE DATA Page#: 1 Remedial Oversight Record ID: 800001461 Facility ID: FA0005099 Site Code 0001461 RWQCB Site ID: Location Site Name:HESS-DUBOIS/PRESTIGE CLEANERS Substance:8052413-Stoddard Solvent Petroleum'? Y Site Contact:PETER WALLACE District: 001 -GUTIERREZ,STEVE Site Address:348 W HARDING WAY Location Code: 01 -STOCKTON STOCKTON CA 95203 Phone:209-477-7605 Fax: Email: Case Type:A-Drinking Water Aquifer used f APN:137-080-01 Number of Monitoring Wells: 7.00 Fund Source:F-Federal Latitude: Free Product: Assigned to:EE0000684-INFURNA Longitude: Depth to GW:23.28'ft Current Status: Contract Status:5 Dates&Info Reported:3/1 1/1991 Confirmed:1/25/1991 RP Search:S-RP Identified and Solvent RP Search Started:8/5/1991 RP Search Ended:7/13/1992 Preliminary Assessment:C-Completed Preliminary Assessment Started:8/5/1991 Preliminary Assessment Ended:10/26/1993 Remediation Investigation:U-Underway Remediation Investigation Started:12/8/1995 Remediation Investigation Ended: Remedial Action: Remedial Action Started: Remedial Action Ended: Post Remediation Monitoring: Post Remediation Monitoring Started: Post Remediation Monitoring Ended: Case Closed:R-Referred to Regional Board Case Closed Date:10/10/2002 Contaminated Soil left in Place: Emergency Response: Remedial Action#I: Federal Exempt:N Remedial Action#2: Case List: Remedial Action#3: Enforcement Action Taken3/1 1/1991 Remedial Action#4: Enforcement Action.Y-Waming Letter or Notice of Violation issued Remedial Action 95: Enforcement Type2-Warning Letter or Notice of Violation issued Remedial Action#6: Exclude from Export?N Remedial Action ftT LUFT Considerations: Aeencies Interim Remediation: N Interim Remediation Date: LUSTIS Update: Last Technical Correspondence:8/7/2002 Review Status: Category: LOP Agency:RB--Non-LOP Underground Storage Tank Prgm Local Agency:UST-Non-LOP Underground Storage Tank Prgm Lead Agency:5-Central Valley RWQCB LOP Site(Pilot Program): N Financial Program Element Code:2960-RWQCB CLEAN UP SITE(SLIC) Comments NOTE:prior to switching to stoddard solvent,site's 8 USTs contained halogenated compounds and currently(Jan,2001) 1,2-DCA,Vinyl chloride,and PCE are detected in on and offsite MW's 4,5,6,&7,in addition to TPH as Stoddard Solvent. 2-4-02:Halogenated solvents increasing in concentration offsite,down gradient MW-6&10. 6-5-02:SWRCB-CUF denies offsite investigative costs under LOP approved work plan due to"chlorinated"not covered under UST sections. 6-26-02:LOP notifies CVRWQCB-SLIC unit(Wendy Cohen)of solvent nature of site and asks in writing for CVRWQCB lead takeover. 10-08-02:Wendy Cohen,CVRWQCB-SLIC Unit notifies EHD that they will oversight all of site("polluted groundwater")included LOP-UST portion and Devra Lewis to handle. Directive letter from her for WP due out soon. 10-9-02:CVRWQCB issues directive for WP due 3 DEC 02 in letter dated 7 OCT 02. 10-10-02: Envisions database updated to 35.29(referred site)and comment letter generated by MI requestion billing forms for"other lead agency site". Legacy Release Information The fields in this section are being replaced with new forms Released Substances,Samples,Analytes in order to comply with GEMIS. These fields will be removed at the end of 2001. To retain this data,it must be entered in the forms noted above. Released Substances Concentrations(pnb) Dissolved Constituent:TPH-ss Maximum Concentrations Current Concentrations Maximum MTBE Date: TPH-Soil:5,100.ppm Excavation Started: TPH-GW: 41000 ppb TPH-GW:3300 ppb Benzene-Soil:<1.2 ppm Benzene-GW:29.ppb Benzene-GW.<0.5ppb MTBE-Soil:<0.05 ppm MTBE-GW:<5.0 ppb MTBE-GW:<5.0 ppb Responsible Parties