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5 <br /> Sequoia1455 McDowell Blvd,Notch Ste D <br /> a Petaluma,CA 94954 <br /> Analytical (707)792-1865 <br /> FAx(707)792-0342 <br /> h w sequoialabs ootn <br /> URS Corp-Sacramento Project Arco Site 2130,Stockton,CA P306252 <br /> 2870 Gateway Oaks Dnve Scute 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 8015B/8021B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW-8(P306252-07)Water Sampled.06/11/03 05 47 Received 06/12/03 11:45 <br /> Gasoline Range Organics 530 50 ug/f 1 3060544 06/23/03 06/23/03 EPA <br /> 8015B/8021B <br /> Benzene 81 050 » » » <br /> Toluene 19 050 » » » » » QR-04 <br /> Ethylbenzene 23 050 <br /> Xylenes(total) 13 050 <br /> Surrogate a,a a-Trijluorotoluene 99% 65-135 ^ ^ » <br /> Surrogate 4 Bromofluorobenzene 100% 65-135 ^ ^ » <br /> VW-10(P306252-08)Water Sampled 06/11/03 05 20 Received 06/12/0311.45 <br /> Gasoline Range Organics 14000 1000 ug/1 20 3060544 06/23/03 06/23/03 EPA <br /> Benzene 1600 10 » „ ^ 801513/802113 <br /> Toluene 39 10 <br /> Ethylbenzene 1100 10 » » » ^ <br /> Ines(total) 3300 10 ^ » <br /> ogate a aa-Tnfluorotoluene 102% 65-135 ^ ^ ^ <br /> Surrogate 4-Bromofluorobenzene 101% 65-135 ^ ^ ^ <br /> VW-1 1(P306252-09)Water Sampled 06/11/0310 23 Received 06/12/0311 45 <br /> Gasoline Range Organics ND 50 ug/! 1 3060383 06/17/03 06/17/03 EPA <br /> 807513/802113 <br /> Benzene ND 0 50 » » » » » » <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 ^ ^ » » » <br /> Surrogate a a a-Tri luorotoluene 103% 65-135 ^ » ^ <br /> Surrogate 4-Bromojluorobenzene 97% 65-135 » ^ ^ <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 /> This analytical report must be reproduced in its entirety <br /> Page 5 of 27 <br />