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i <br /> i <br /> f•, <br /> i <br /> R <br /> Mr. Ryle Christie <br /> October 16, 1991 <br /> Page 8 <br /> Analytical results of groundwater samples arc summarized in Table 3, along with previous <br /> Analyt' i resented in Exhibit B. <br /> results. The complete laboratory report for the July 1991 sampling s p <br /> Figure 2 shows BM concentrations. <br /> Discussion <br /> hydraulic <br /> dient of <br /> The general groundwater flow dire ction to the oundwater monitoringsouth and the �(April 1991). Thehydraulic <br /> not changed since the previous quarterly gr <br /> gradient is gentler beneath the station than downgradient of the siteand also <br /> apil pears <br /> to be <br /> level <br /> gentler <br /> underneath the station than during he last quarterly sampling <br /> event inelevations decreased from 2.98 to 3.65 feet in all monitoring wells. <br /> wells W-2, W-3, W-5, W-7, W-9, W-10, and W-12 showed an increase in <br /> Monitoringents wells <br /> concentration of one or�more a of the B�e in TPH tcance�ttrauo Hand a decrease Monitoring <br /> po gage m <br /> W-IA Qnsti <br /> and LTJ-2B showed <br /> Bl�'X constituents. Comparison of the analytical results from this quarter with previous results <br /> 2 was <br /> indicates that the concentrations fluctuate with time. The sasnPle from Ethylatene s well <br /> was <br /> analyzed for ethylene dibromide as requested b S-n Joaquin County. <br /> not detected in this sample. <br /> If you have any questions,please contact me or Mr.Mart Turner at (916)444-0123. <br /> ~very truly yours, <br /> BROWN AND CALDWELL GE <br /> �`7/►' e <br /> utlab sa G LUCA <br /> .� <br /> laiyAcas,R.G. tio,43 S01 <br /> Project Manager -IC <br /> sl ,..r••.r,; <br /> OFr. <br /> JL.:JH:jrb <br /> Enclosures <br /> cc: Mr. Gordon Boggs, California Regional Water Quality Control Board, <br /> Central Valley Region <br /> Ms. Laurie Cotulla, San Joaquin County Local Health District <br /> Mr. Chris Winsor, ARCO Products Company <br /> 33 gp�pata:33R003.}y <br /> Brawn and Caldwell <br />