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PUBLIC HEALTH SERV ICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D . , M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 �'LrFsa� P <br /> 209/468-3420 <br /> FILE COP Y <br /> R ELLIS JR OCT 91998 <br /> ETHYL D ELLIS TRUSTEE ETAL <br /> 3240 CALHOUN WAY <br /> STOCKTON CA 95219 <br /> RE: CALIFORNIA TANK LINES, INC Site Code: 1095 <br />° 3105 S ELDORADO ST <br /> STOCKTON CA 95206 <br /> San Joaquin County Public Health Services Environmental Health Division (PHSIEHD) observed <br /> the removal of two, ten thousand gallon Underground Storage Tanks (USTs) #1 and #2 on <br /> September 4, 1998, at the above referenced site. Soil contamination was documented below <br /> USTs #1 and #2. The soil and groundwater investigation of contamination is ongoing from USTs <br /> #3 and #4 that were removed in 1990. <br /> PHSIEHD has reviewed the Over Excavation Work Plan submitted by Environeering, Inc. , to <br /> address UST #1 and #2 contamination . The lateral and vertical extent of contamination in the <br /> area of UST #1 and #2 (and the entire site) has not been defined. Remedial alternatives have not <br /> been evaluated. Over excavation of the proposed 30 cubic yards of soil can be performed as an <br /> interim remedial action if preapproval from the State Water Resources Control Board(SWRCB) <br /> Cleanup Fund is obtained. <br /> If the responsible party wants to proceed without preapproval from the SWRCB Cleanup Fund, <br /> they may do so with the knowledge that the costs may not be reimbursed. Soil samples from both <br /> the stockpiles and the excavation should be analyzed for Benzene, Toluene, Ethylbenzene and <br /> Xylene (using EPA Method 8020) as well as Total Petroleum Hydrocarbons as Diesel . The <br /> removal of an additional 30 cubic yards of soil would calculate to only two additional vertical feet of <br /> contaminated soil being removed . The benefit of this work may not justify the cost. PHS/EHD <br /> agrees with the proposal to resample the stockpiled soil generated during the UST removal to <br /> evaluate if it can be used as fill in the top porton of the excavation. <br /> Submit a Work Plan for determining the lateral and vertical extent of contamination at this site, <br /> addressing previous and recently discovered soil and ground water contamination , with the <br /> following components: <br /> • Address the recently discovered oil contamination in Monitoring Well #2. Identify the source <br /> of this contamination and propose a disposal plan for removed oil. <br /> • Soil samples collected on January 1 , 1997, 30 feet below surface grade in the area of USTs <br /> #3 and #4 indicated Benzene at . 09 parts per million (ppm), Total Petroleum Hydrocarbon as <br /> gasoline at 126 ppm, Total Petroleum Hydrocarbon as oil at 15, 000 ppm. Continuous core <br /> soil sampling is recommended to investigate the soil and ground water below USTs #1 and #2 <br /> USTs #3 and #4. The vertical extent of contamination at this site has not been defined since <br /> soil samples below 30 feet have not been analyzed. <br /> A Division of SanJoaquin County Health Care Services <br />