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i <br /> PUBLIC�UALIH <br /> SAN JOAQUIN COUNTY <br /> ENVIRC)1VMENTAL HEALTH DIVISION <br /> X <br /> Ernest M.Fujimoto,M.D.,M.P.H., Acting Health .0 5 <br /> 30t. Weber Ave.,Third Floor • P. 4. Box 388 • Stockton, CA 95201.-038th i�E <br /> 2091468-39 <br /> MIKE HARPER C (op <br /> CONTRACT IUIa4NA+G:ER:: <br /> STATE VMTER RESOURCES. CQNTR0L BOARD <br /> LOCAL .OVERSIGHT PROGRAM DEI`113 :06 <br /> PO BOX 944212 <br /> SACI:;MMTl CA 942442120 <br /> RE 01$FVTE SETTLEMENT <br /> FORMER TEXACO' n"TCGO'S SITE CGDE::9.149 <br /> 306:$: HUTCHINS;ST <br /> Loc DI, CA 95240 <br /> At en October 2 ; 1996 Technical Review Committee(TRC)meeting,Sari Joaquin County Public <br /> Health Servicesi Environmental Health Division (PHS-EHD)concluded that the responsible parties <br /> for the above noted site had satisfied all investigative and remedial actions in response to a rebase <br /> from the underground tanks previogsly located at this site. As required by contractual agreements <br /> between PHS-EHD and the State Water Resources Control Board (SWRCB),the required <br /> documents were forwarded to the Central Valley Regional Water Quality Control Board <br /> (OV ,WQCB)for their opportunity to review the case and respond in writing to any concerns they <br /> may:have.. <br /> Correspondence dated November 26, 1996 from the CVRWQCB Interim Executive Officer James R. <br /> Bennett, advised that;based on concerns presented by Board staff,Elizabeth Thayer,further <br /> investigation and possible remediation may be required and the CVRWQC13 did not concur with the <br /> "no further action"decided upon by PHS-EHD. <br /> The purpose of this letter is to provide you with some additional information and to formally request <br /> a settlement of this dispute by your agency. <br /> PHS-EHD has previously concluded that this underground tank site(UGT) is at the lateral border of <br /> the groundwater 1,2 DCA plume known to be in the Lodi area. With known groundwater 1,2 DCA <br /> :concentrations up-gradient, laterally-gradient, and down-gradient of this UGT sites.PHS-EHD <br /> designed.it's oversight efforts into evaluating the impact of the petroleum release from the;UGrs. <br /> and'its effects on the groundwater beneath the site. <br /> Recently the SWRCB has encouraged risk based decision making at UGT sites. levels of gasoline <br /> constituents in the groundwater, with Benzene of prime concern; and the distance of the plume to <br /> receptors in th+e area are.consideretl':when determining that further lnvestigation or remediation are <br /> not required. <br /> The.July:31, 1996 sampling event indicated that Benzene was not detected in the groundwat6r:&brrt <br /> the monitoring wells on-site. The up-gradient and off-site MW-5, locateddust dawn-gradient trem an. <br /> ADiViMon..ofSan Joaquin County Health.Care Services <br />