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°a <br /> Sequoia 1455 McDowell Blvd,North Ste D <br /> Petaluma,CA 94954 <br /> (707)792-1865 <br /> Analytical. FAX(747)792-0342 <br /> www,sequoialabs.com <br /> 0 Y <br /> i <br /> URS Corp-Sacramento Project: Arco Site 5469,Stockton,CA P406178 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36605 Reported: <br /> Sacramento CA,95833 Project Manager: Jay Johnson 06/30/04 13:08 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1(P406178-01)Water Sampled:06/08/04 09:12 Received:0610810411:30 <br /> Gasoline Range Organics(C4-C12) ND 50 ugA 1 4060273 06/11/04 06/11/04 EPA <br /> 801513-VOA <br /> Surrogate:4-Bromofluorobenzene 99% 65-135 " <br /> MW-2(P406178-02)Water Sampled:06/08/04 07:02 Received:06108/0411:30 <br /> Gasoline Range Organics(C4-C12) ND 50 ugA l 4060273 06/11/04 06/11/04 EPA <br /> 8015E-VOA <br /> Surrogate:4-Bromofluorobenzene 103% 65-135 " <br /> MW-3(P406178-03)Water Sampled:06/08/04 07:36 Received: 06/08/04 11:30 <br /> Gasoline Range Organics(C4-C12) ND 50 ugA 1 4060273 06/11/04 06/11/04 EPA <br /> 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene 100% 65-135 " <br /> MW4(P406178-04)Water Sampled:06/08/04 09:50 Received:0610810411:30 <br /> asoline Range Organics(C4-C12) 8500 1000 ugA 20 4060273 06/11/04 06/11/04 EPA <br /> 8015B-VOA <br /> Surrogate:4-Bromofluorobenzene 100% 65-135 " <br /> MW-5(P406178-05)Water Sampled:06/08/04 09:00 Received:06/08/04 11:30 <br /> Gasoline Range Organics(C4-C]2) 120 50 ugA 1 4060273 06/11/04 0611 1/04 EPA HC-19 <br /> 80 i 5B-VOA <br /> Surrogate:4-Bromofluorobenzene 100% 65-135 " <br /> MW-6(P406178-06)Water Sampled:06/08/04 08:22 Received: 0610810411:30 <br /> Gasoline Range Organics(C4-C12) 3400 1000 ugA 20 4060273 06/11/04 06/11/04 EPA <br /> 801513-VOA <br /> Surrogate:4-Bromofluorobenzene 101% 65-135 " <br /> MW-7(P406178-07)Water Sampled:06/0810405:11 Received:06/08/04 11:30 <br /> Gasoline Range Organics(C4-C 12) ND 50 ugn 1 4060273 06/11/04 06/11/04 EPA <br /> 8015B-VOA <br /> Surrogate:4Bromofluorobenzene 100% 65-135 " <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the <br /> chain of custody document. Unless otherwise stated, results are reported on a wet <br /> weight basis. This analytical report must he reproduced in its entirety. <br /> k Page 4 of 37 <br /> f <br />