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pg <br /> w .�se �� y .,�, � �"r ..+,,• •.-bl - � +,1st- r.�.^", <br /> r <br /> i <br /> Mr. Chuck Carmel <br /> May 29, 1-991 <br /> Page 3 <br /> water samples and water-level elevation are sumctt 199 a5 sampling is <br /> Analytical results of ground report for the February <br /> The complete laboratory <br /> along with pre,•rious res..iW`,• re 2 shows BETX and TP1z concentrations sampled for each well. <br /> presented ir.Exhibit B• r3gu <br /> Discussion <br /> flow direction has not changed at this site since the last groundwater <br /> The general groundwaterWater-level hal elevations have increased in I1 of the 15 wells by <br /> manitrring (September 1990)- wells E-S, E-9, and E-10 have <br /> an average rin of 0.44 feet. I Watefeetr-level elevations in monitoring <br /> decreased.an average of <br /> s PR-1,PR-2,and BHD-2 do not contain detectable concentrations11and BHD-I and <br /> Monitoring well E-G, E-10, <br /> d E in <br /> -12. Ethylbenzene concentrations haveoluene�con entrat ons <br /> wells E-7, <br /> TPH. Benzene concentrations 1ncreased in wells E-4, E 8>4 and E-S. <br /> decreased in wells E-5.E-7, 1 and decreased in wells E <br /> E_$� E.9,E-11,E-12, and BHD- 12,and BHD-I and have decreased in wells E 4, <br /> have incre>+sed in wells E-7,E-8,E-I0,E-11,E- and I I and have decreased <br /> E-5 and E-9. Xylenes concentrations have increased d in colncen -ations have increased in wells <br /> in wells E-4,E-5,E-7,E-9,E-10.E-12,and BHD- <br /> E_7 E-9,E_1Q,E-11,E-12 and have decreased to nondeteetable in BUD-2.questions, <br /> E-4,E$, 1991. If you have a y Q <br /> lan will continue through . <br /> The current groundwater monitoring <br /> 23. <br /> please contact me at (916) <br /> very truly yours, <br /> BROWN AND CALDWELL <br /> Steven Misner <br /> Project Manager <br /> SDM:MTT:mkw <br /> Enclosures arnnent <br /> cc: Mr. Laurie Cotulla, San Joaquin County Health Dep• <br /> Mr. John Randall, <br /> Chevron <br /> ucts Company <br /> Mr. Chris Winson,ARCO <br /> a <br /> Brawn and Caldwell <br /> �c;nsu,sar+ts <br />