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a <br /> YA Sequoia 1455 McDowell Blvd.Noah Ste D <br /> 1 PetalUma,CA 94954 <br /> S (107)792-1865 <br /> AnalyticalFAX <br /> h (707)792-0342 <br /> www sequotalabs com <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P306252 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number lntnm-50293 Reported <br /> Sacramento CA,95833 Project Manager Vemon P Elarth 06/27/03 17 13 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 801 5B/8021B <br /> Sequoia Analytical -Petaluma <br /> RepoiUng <br /> Analyte Result L=t umts Ihluuon Batch Prepared Analyzed Medwd Notes <br /> MS-2A(P306252-13)Water Sampled 06/11/03 08 23 Received 06/12/03 11.45 <br /> Gasoline Range Organics ND 50 ug/1 1 3060544 06/23/03 06/23/03 EPA <br /> 8015B/8021B <br /> Benzene ND 050 <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 050 ^ „ <br /> Xylenes(total) ND 050 <br /> Surrogate a a,a-Tri luorotoluene 100% 65-135 <br /> Surrogate 4-Bromofluorobenzene 101% 65-135 ^ ^ ^ <br /> MS-2B(P306252-14)Water Sampled 06/11/030830 Received 06/12/0311 45 <br /> Gasoline Range Organics ND 50 ug/1 1 3060544 06/23/03 06/23/03 EPA <br /> 8015B/8021 B <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 ^ ^ ^ <br /> Alwenes(total) ND 050 <br /> -MIrragate aa a-Trtfluorotoluene 101% 65-135 ^ <br /> .Surrogate 4Bromofluorobenzene 100% 65-135 „ <br /> MS-3A(P306252-15)Water Sampled 06111/0308-45 Received 06/12/03 11.45 <br /> Gasoline Range Organics ND 50 ug/l 1 3060544 06/23/03 06/23/03 EPA <br /> 801513/8021B <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Surrogate a a a-Tri luorotoluene 102% 65-135 <br /> Surrogate 4-Bromofluorobenzene 99% 65-135 <br /> o <br /> uo1a 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 /> Thu analytical report must be reproduced in to entirety <br /> Page 7 of 27 <br />