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` Fm Brown and Caldwell J <br /> JUL 5 M11 <br /> ENVIRONMENTAL HEALTH <br /> pERMIT/SERVICES <br /> July 2, 1991 <br /> M.r. Kyle Christie <br /> ARCO Products Company <br /> Post Office Box 5:111 017-5380-0311 <br /> San Mateo, California 94402 <br /> Subject: Quarterly Report for ARCO Station 434,501 Kettletttan Lane, <br /> Lodi, California: Site Code 1341 <br /> Dear Mr. Christie: <br /> ts of <br /> ndwater <br /> ing <br /> This report presents quarterly water Ic�ARC0) Station and t434,rlocated t 501t`Kettlem an Lane in <br /> performed at ARCO Products Company( Mere are six on-site monitoring wells <br /> Lodi,California on January 29,30,and February 1, 1991. <br /> (W-IA,W-2,W-2A,W-2B,W-3,and W-9) and nine off-site monitoring wells(W-4,1V-5,W-6, <br /> W-7,W-11,W-9,W-10,W-11,and W-12)(Figure 1). All monitoring welds were s:unpled except <br /> W-2A and W-4, due to lack of water and slow recharge in these wells. <br /> Field and Analytical Methods <br /> saw P0rgi"g of <br /> ch well, <br /> Brown and Caldwell person l mesas ird1 de e site. tR ler toater lExlitbi[o Arfor detailed Fieldamethods <br /> and collected groundwater , <br /> amp <br /> les <br /> All groundwater samples were analyzed for total petroleum hydrocarbons (TPH) and benzene, <br /> ethylbenzene,toluene, and xylenes(BETX)by Modified U.S. EnvironmentaldtE lowereency <br /> also <br /> (EPA) Method 801515030• Monitoring wells W-1 A, W-12, W-10, W-11, <br /> analyzed for fecal coliform at the request of San Joaquin County. <br /> Results <br /> The Groundwater flow direction is to the south-southwest. The hydraulic Gradient is <br /> approximately 0.002. <br /> Analytical results of groundwater samples : summarized <br /> toile along <br /> tile Juivarysm is presented inprevious Exhibit B <br /> results. The complete laboratory report for <br /> Figure <br /> 2 shows BETX concentrations. Table 2 shows fecal coliform results. <br />