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Attachment i <br /> I;unununenral I'n.trcliuu AKenay <br /> Srarr u':err Rr.runtc r'nurm!Rn,u <br /> Underground Storage Tank Cleanup Fund <br /> CASE RE VIEW FORM <br /> Date: 5/14/97 LUSTIS File No.: Oversighl Agency: San Joaquin County health Department <br /> Site Nome/Address; Unocal 2559 Responsible Parties: Address: Telephone No.: <br /> 1666 Pac Avenue Ihlocal Corporation PX). Boz 5155 (510)277-2331 <br /> Stockton.California Alto: Mr. Bob Boust San Ramon,CA 94593 <br /> 1. CASE INFORMATION(N/A=Not Applicable) <br /> Tank No. Size in Gallons Contents Closed hi-Place/Removed? Date <br /> 1 10,000 Super Unleaded Gasoline Removed 03/29/88 <br /> 2 10,000 Regular Unleaded Gasoline Removed 03/29/88 <br /> 3 550 Waste Oil Removed 03/29/98 <br /> 11. SITE CHARACTERIZATION INFORMATION(GW=groundwater) <br /> GW Basin: Eastern San Joaquin County Beneficial Uses: All Depth to Drinking Water Aquifer: pump at 160 feet in closest municipal well. <br /> Distance to Nearest Municipal Supply Well: Distance Between Known Shallow GW Contamination&c Aquifer: <br /> 900 feet north >20 feet <br /> s <br /> i <br /> GW Highest Depth: 30.1 1GW Lowest Depth: 55.33 Well Screen Interval: 19-60 feet Flow Direction: East-northeast <br /> Soil Ttpe: Silt and silty sand. Ma.mmum Depth Sampled: 60 feet <br /> IIL MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS-Initial and Latest -=Not Reported,ND=Non-Detect <br /> Contaminant Soil(mg/kg) Water(gg/L) Contaminant Soil(mg/kg) Water <br /> (11gI-) i <br /> Initial(Year) Latest(Year) Initial(Year) Latest(Year) Initial(Year) Latest(Year) Initial(Year)I Latest(Year) <br /> 1988 1997 1988 1997 1988 1997 1988 1 1997 <br /> TPH((:as) 582 NIA 99,000 ]10,000 Ethylbenzene {0.40 NIA 5,000 4,100 <br /> TPH(Diesel) N/A N/A N/A N/A Nylenn 39.10 NIA 25,000 20,000 <br /> Benzene 0.60 N/A 5,700 1,500 MtBE NIA N/A N/A ND <br /> Toluene 6,50 N/A 48,800 29,000 Other N/A N/A NIA N/A <br /> I <br /> W. SOIL REMEDIATION <br /> Method: Excavation and soil vapor extraction. Duration of Remediation: SVE: Jan-Oct. 1996 <br /> I <br /> V. GROUNDWATER REMEDIATION <br /> Method: None Duration of Remediation: <br /> VL FREE PRODUCT <br /> Was Free Product Encountered? Yes No= 7H,,; e Product Been Totally Recovered? Yes O No= N/A <br /> When Was Free Product Recovery Project Completed? NIA <br /> f <br /> VII. RECOMMENDED ACTION <br /> Soil Closure Only? Yes= NoE:= Case Closure? Yes= No= Solvent Case? Yes No= <br /> Additional Action Required(i.e..additional site assessment,remediation,monitoring): None <br /> VIII. JUSTIFICATION FOR RECOMMENDED ACTION <br /> Site fully assessed. Plume stable, No MtBE. No water-sueply„yells uvithin 750 feet. No remaining petroleum saturated soil. <br /> No fee rodnct in any wells. <br /> 3100406MUSTFUNp_XLS (REV 611019 <br />