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J � - <br /> LA <br /> Y <br /> - Brown and Caldwell <br /> Consultants <br /> 723 S Steel <br /> �'�'� Sacramento <br /> Cahlarna95814.7092 �� jiCi P7�1^ <br /> {9161444.0123 <br /> FAX(%j 444-8437 <br /> V I1 <br /> October 16, 1991 (H 9 l <br /> ENV�i nNM N VIHEALTH <br /> CES <br /> Mr.Kyle Christie <br /> ARCO Products Company <br /> Post Office Box 6411 (117-5380-03/1 <br /> Artesia,California 90702-6411 <br /> Subject: Quarterly Report for ARCO Station 434, 501 Kettleman Lane, <br /> Lodi, California: Site Code 1341 <br /> Dear. Mr.Christie: <br /> This report presents water levels and analytical results of groundwater sampling performed at <br /> Lane in Lodi, <br /> ARCO Products Company (ARCO) Station ere located si 501 Kewells(W-IA, , <br /> California on July'21,?3.24,and 25, 1991. There are six on-site monitoring 5,W-6,W-7, W-8, <br /> W-3, and W-9) and eight off-site monitoring wells (W-4, <br /> W-�`,W- wells were sampled except W-2A and W-4, <br /> W-10,W-I1,and W-12)(Figure 1). All monitoring <br /> due to lack of water and slow recharge in these wells- <br /> Field and Analytical Methods <br /> Brown and Caldwell personnel treasured dep <br /> th-to-water levels, oversaw purging of each well, <br /> and collected groundwater samples at the site. Refer to Exhibit A for detailed field methods <br /> descrl2tion. <br /> H) and benzene, <br /> All groundwater samples were anal,zed for total U.S. <br /> En r <br /> Environmental Prrotectocarbons ion Agency (EPA) <br /> ethylbenzene, toluene, and xylenes (BETS ) by <br /> Methods 5030/modified 801518020. <br /> Results <br /> The general groundwater flow direction is to the south. The general approximate hydraulic <br /> gradient is 0.002. Groundwater elevation contours for July 1991 are shown on Figure i. <br /> past and resent hydraulic- -_- <br /> Table 1 presents the water-level elevations and Table 2 presents the p - <br /> gradients and directions for the subject site. <br />