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.r��W� •r 9m bd2 .rte �b. '��� r .� L � ^W <br /> '�Sr,��l°v� <br /> SILR' RA <br /> I <br /> I <br /> Decemhcr 20- l9g0 - <br /> Chilt RMILT-11 <br /> Chevron USA <br /> P.O. BoX 500-1 <br /> S,'sIs 1-imon, CSA 9.1583 <br /> RC: Former Chevron S.S. 19.6171 <br /> 6633 PaCIfIL,Avenue <br /> Stockton, California <br /> SF:S PrGlcct ii l 1 lG 0 1 <br /> i)car Mr. Rogers: <br /> Phis report prescuts the ressulls Gf t!ae r111artes'1}'water sampling tit former Chevron S.S.419- <br /> 6171, located at 6633 Pacific Archie in Stockton, Californda (Figure 1,Appendix A). Four wells, <br /> MW-2 through Wel-C aarnple(] IFigurr 2,Appendix A). <br /> Oil\ovcmher 29. 1990, SES personnel k'isiteti the;ije, Water levels were measured in all <br /> wells, and all were cllcckt'd for the preSencc of free phase hydrocarbons. Free phase <br /> lrvdrocarbons were nut presort in men oft he site wells. Well M"'-I «'as dty. W, 'lter level data is <br /> shower in-fable 1 #Appendix 131. <br /> The wafer samples wore collected on November 29. 3990 in accordance with SES Standard <br /> Uperalinq}'n:accdsstc • Ground 1Valer Sampling(Appcncltx Cl. 'fhe grGLrnd s;ulzples h'am <br /> M\V-2 through MW-5 Wert-anzalyz(-d for iotal purge able petroleum hydrocarbons UPPH)asgasoline <br /> (G) by EPA Me;hod 8015, incl for benzene, to!ucne, etllylbenze.le end xylenes (BTEX) by EPA <br /> Method 602. The sample from well MW-5 was also,,nal%-zed for oil and grease(O&G)by Standard <br /> MetIILsLls Method 503E and volol lie organic compounds(VOCs)by EPA method 8290, The ground <br /> water sample froul well MW-,1 was also analyzed for (Leal colifolnl by EPA Method 910. Fecal <br /> coliform analysis was perfunneci by 1Cctinedy/Jenks/Chilton 1,aborrltory of San Francisco, <br /> California. All other analyses '+'ere perforated by Superior Analyl'scal Laboratory of Martinez, <br /> Caldor-iiia. SES is not responsible for laboratory omissions or errors. <br /> I ly(lructu'bosls as gasoline mud BTI X were licit detected ill ground water samples from any <br /> of tile. wells MW-2, m\1 r-3 and MW-5. The ground water sample from well MW-4 contained 150 <br /> ppb of a non-gasoline compound which could not be identified by the laboratory. Fecal coliform <br /> «•as not rletecterl in tll2 ground water sample frons well M1^.1S'••; and TOG was imi detected in lne <br /> ground water saluple from well MW-5. The ground water sample fro-.n well MSV-5 contained 1.2- <br /> P.0. <br /> ,2-P.0. Box 2546 Martinez. California 94550 6 (415) '070- 1280 <br />