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Sequoia 1455 McDowell Blvd,North Ste D <br /> `i Petaluma,CA 94954 <br /> (707)792-1965 <br /> j Analytical FAX M7)792-0342 <br /> h` www sequa>alabs eom <br /> URS Corp-Sacramento Project. Arco Site 2130,Stockton,CA P306252 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 06/27/03 17 13 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015BI8021B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Umts Dilution Batch Prepared Analyzed Method Notes <br /> VW-1(P306252-01)Water Sampled 06/11/03 09 35 Received 06/12/0311 45 <br /> Gasoline Range Organics ND 50 ug/l 1 3060544 06!23/03 06/23/03 EPA <br /> Benzene ND 050 » ^ " 8015B/8021B <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 » ^ » » <br /> Xylenes(total) ND 050 » » ^ <br /> Surrogate a a,a-Tnfluorotoluene 105% 65-135 <br /> Surrogate 4 Bromofluorobenzene 97% 65-135 <br /> VW-2(P306252-02)Water Sampled 06/11/03 05.16 Received 06/12/03 11 45 <br /> Gasoline Range Organics 53 50 ugll 1 3060544 06/23/03 06123/03 EPA <br /> 8015BY8021B <br /> Benzene ND 0 50 <br /> Toluene ND 050 » » <br /> Ethylbenzene ND 050Aftl <br /> eves(total) ND 050 ^ » » ^ ^ <br /> arrogate aa a-Tnfluorotoluene 103% 65-135 ^ " <br /> Surrogate 4 Bromofluorobenzene 100% 65-135 " - <br /> VW-3(P306252-03)Water Sampled 06/11/03 06.47 Received:06/12/0311 45 <br /> Gasoline Range Organics ND 50 ug/l 1 3060544 06/23/03 06/23/03 EPA <br /> Benzene ND 050 ^ » ^ 8015B/8021B <br /> Toluene ND 050 » ^ ^ <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 ^ » ^ ^ <br /> Surrogate a,a,a-Tnfluorotoluene 102% 65-135 <br /> Surrogate 4-Bromofluorobenzene 100% 65-135 <br /> uoia 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 /> 7h's analytical report must be reproduced in its entirely <br /> Page 3 of 27 <br />