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Sequoia 1455 McDowell Blvd,North Ste D <br /> + Petalrna,CA 94954 <br /> (707)792-1865 <br /> Analytical FAX(707)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:GOBZK-0002 Reported: <br /> Sacramento CA,95833 Project Manager:Vemon P.Elarth 04/I3/05 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-10(P504010-15)Water: Sampled:03127/0510:00 Received:03130/0511:50 <br /> Gasoline Range Organics(C4-C12) 12000 1200 ug/l 25 5040054 04/06/05 04/06/05 EPA 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene 98% 80-710 " <br /> VW-11(P504010-16)Water Sampled:0312810514:00 Received:03130/0511:50 <br /> Gasoline Range Organics(C4-C]2) ND 50 ugll 1 5040054 04/06/05 04/06/05 EPA 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene. 93% 80-110 " <br /> VW-12(P504010-17)Water' Sampled:03/28/0514:20 Received:03/30/0511:50 <br /> Gasoline Range Organics(C4-C12) 310 50 ug/l 1 5040054 04/06/05 04/06/05 EPA 8015B-VOA <br /> Surrogate:44romofluorobenzene 97% 80-110 <br /> MS-IA(P504010-18)Water Sampled:03/29/05 08:35 Received:03130/0511:50 <br /> Gasoline Range Organics(C4-C12) 65 50 ug/1 1 5040054 04/06/05 04/06/05 EPA 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene 93% 80-110 " <br /> 'VIS-1B(P504010-19)Water Sampled:03/29/05 07:40 Received:03/30/05 11:50 <br /> Gasoline Range Organics(C47C12) ND 50 ug/1 1 5040054 04/06/05 04/06/05 EPA 8015B-VOA <br /> Surrogate:44romofluorobetizene 92% 80-110 " <br /> MS-2A(P504010-20)Water Sampled:03/29/05 08:25 Received:03130/0511:50 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5040054 04/06/05 04/07/05 EPA 8015E-VOA <br /> Surrogate:4-Bromofluoroberizene 92% 80-110 " <br /> MS-2B(P504010-21)Water, Sampled:03/29/05 08:50 Received:03/3010511:50 <br /> Gasoline Range Organics(C4-C 12) ND 50 ug/1 1 5040054 04/06/05 04/07/05 EPA 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene. 89% 80-110 " <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 5 of 29 <br /> 1 <br />