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Sequoia 1455 McDowell Blvd,Notch Ste D <br /> Z <br /> Petaluma,CA 94954 <br /> IW FAx Analytical (707)792-1$65 <br /> t77�792-0342 <br /> www.sequoialabs.com <br /> URS Corp-Sacramento Project:Arco Site 2130,Stockton,CA P504010 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number:G08ZK-0002 Reported: <br /> Sacramento CA,95833 Project Manager,Vemon P.Elarth 04/13/05 09:46 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> VW-1(P504010-08)Water Sampled:0312810514:35 Received:03/30/05 11:50 <br /> Gasoline Range Organics(C4-Cl2) 18000 500 ug/l 10 5040041 04/05/05 04/05/05 EPA 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene 115% 80-110 " " " " Ly <br /> VW-2(P504010-09)Water Sampled:03/27/05 07:50 Received:0313010511:50 <br /> Gasoline Range Organics(C4-C12) 110 50 ug/l 1 5040041 04/05/05 04/05/05 EPA 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene 69% 80-110 " <br /> VW-3(P504010-10)Water Sampled:03/28/05 13:20 Received:03/30/0511:50 <br /> Gasoline Range Organics(C4-Cl2) 150 50 ugA 1 5040041 04/05/05 04/05/05 EPA 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene 91% 80-110 " <br /> VW-4(P504010-11)Water Sampled:03/27/05 08:15 Received:0313010511:50 <br /> Gasoline Range Organics(C4-C12) 150 50 ug/I 1 5040041 04/05/05 04/06/05 EPA 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene 88% 80-110 " <br /> VW-5(P504010-I2)Water Sampled:03/27/05 09:15 Received:0313010511:50 <br /> Gasoline Range Organics(C4-C12) 150 50 ug/1 1 5040041 04/05/05 04/06/05 EPA 801513-VOA <br /> Surrogate:4-Bromofluorobenzene 85% 80-110 <br /> VW-7(P504010-13)Water Sampled:03/28/05 13:45 Received:0313010511:50 <br /> Gasoline Range Organics(C4-Cl2) 280 50 ug/1 1 5040041 04/05/05 04/06/05 EPA 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene 93% 80-110 " <br /> VW-8(P504010-14)Water Sampled:03/27/05 09:40 Received:0313010517:50 <br /> Gasoline Range Organics(C4-C12) 4100 500 ug/I 10 5040054 04/06/05 04/06/05 EPA 801513-VOA <br /> Surrogate:4-Bromofluorobenzene 97% 80-110 11 " " <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 4 of 29 <br />