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California Regional Water Quality Control Board <br /> Central Valley Region <br /> Steven T.Butler,Chair <br /> Winston H.Hickox Gray Davis <br /> Secretaryfor Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/—rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 30 June 2000 <br /> Mr. Jim Lancaster <br /> Woolsey Oil, Inc. <br /> 166 Frank West Circle <br /> Stockton, CA 95206-4098 <br /> REVIEW OF THE 1999 FOURTH QUARTER AND 2000 SECOND QUARTER <br /> GROUNDWATER MONITORING REPORTS, WOOLSEY OIL COMPANY (FORMER <br /> ROBERTS PETROLEUM), SAN JOAQUIN COUNTY <br /> I have reviewed the Fourth Quarter 1999 and Second Quarter 2000 Groundwater Monitoring and <br /> Sampling Reports (reports) submitted by Ground Zero Analysis, Inc. (GZA) on behalf of Woolsey Oil <br /> Company(Woolsey) for the bulk fuel plant at 930 Victor Road in Lodi. The facility includes seven <br /> aboveground storage tanks (AGTs), associated appurtenances, an office/warehouse building, and loading <br /> area. The site has five 12,000-gallon AGTs containing diesel fuel, one 1,000-gallon AGT containing <br /> kerosene, and one 275-gallon AGT-containing solvents. Historic petroleum hydrocarbon releases have <br /> contaminated soil and groundwater at the site. Free product is present in well MW-8 at thicknesses <br /> ranging from 0.24 feet (fourth quarter 1999) and 1.48 feet(second quarter 2000). Product is bailed from <br /> the well during each monitoring event. During the fourth quarter 1999 and second quarter 2000, the <br /> groundwater flow direction was southerly with the gradient ranging from 0.003 to 0.022 ft/ft (fourth <br /> quarter 1999) and from 0.004 to 0.017 ft/ft (second quarter 2000), which is consistent with historic data. <br /> I have the following comments on the quarterly reports: <br /> 1. Woolsey needs to add oxygenates to groundwater monitoring for all wells. Oxygenates shall <br /> include methyl tertiary butyl ether(MTBE), tertiary amyl methyl ether(TAME), di-isopropyl <br /> ether(DIPE), tertiary butyl alcohol (TBA), ethyl tertiary butyl ether (ETBE), methanol, and <br /> ethanol. Analysis for oxygenates shall use EPA Method 8260 with the following detection limits: <br /> Analyte Detection Limits ( /1) <br /> MTBE, TAME, DIPE, ETBE 0.5 <br /> TBA 5.0 <br /> Methanol 50.0 <br /> Ethanol 5.0 <br /> California Environmental Protection Agency <br /> a Recycled Paper <br />