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Sequoia 1455 McDowell Blvd,North Ste p <br /> Petaluma,CA 94954 <br /> ��► (707)792-1865 <br /> Analytical <br /> 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 04/13/05 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 /> MW-1(P504010-01)Water Sampled:0312810510:15 Received:0313010511:50 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5040041 04/05/05 04/05/05 EPA 80158-VOA <br /> Surrogate:4-Bromofluorobenzene 91% 80-110 <br /> MW-2(P504010-02)Water Sampled:0312810511:15 Received:03/3010511:50 <br /> Gasoline Range Organics(C4-C12) 84 50 ug/l 1 5040041 04/05/05 04/05/05 EPA 80158-VOA PV <br /> Surrogate:4-Bromofluorobenzene 91% 80-110 " <br /> MW-3(P504010-03)Water Sampled:03/28/05 11:35 Received:03/30/05 11:50 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5040041 04/05/05 04/05105 EPA 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene 91% 80-110 " <br /> MW-4(P504010-04)Water Sampled:0312810512:00 Received:03/30/05 11:50 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5040041 04/05/05 04/05/05 EPA 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene 89% 80-110 " <br /> k4w,VIW-5(P504010-05)Water Sampled:03/27/05 09:00 Received:03/30/05 11:50 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5040041 04/05/05 04/05/05 EPA 8015E-VOA <br /> Surrogate:4-Bromofluorobenzene 86% 80410 <br /> MW-6(P504010-06)Water Sampled:03/29/05 10:05 Received:03/30/05 11:50 <br /> Gasoline Range Organics(C4-C12) 55 50 ug/l 1 5040054 04/06/05 04/06/05 EPA 8015B-VOA PV <br /> Surrogate:4-Bromofluorobenzene 91% 80-110 <br /> MW-7(P504010-07)Water Sampled:0312810512:35 Received:0313010511:50 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 5040041 04/05/05 04/05/05 EPA 801513-VOA <br /> Surrogate:4-Bromofluorobenzene 87% 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 3 of 29 <br />