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Y' acr mn Ave Ste 8 <br /> Sequoia Sacramento to CA 95634 <br /> Analytical FAX 01 <br /> (916)921- 00 <br /> (916)921 0100 <br /> qW www sequotalabs com <br /> Weston Solutions Inc-Walnut Creek Project San Joaquin HSA 5412468 <br /> 1575 Treat Blvd,Ste 212 Project Number NIA Reported <br /> Walnut Creek CA,94596 Project Manager Michelle Zehr 01/04/05 13 32 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B <br /> ' Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> ' MW-6(S412468-05)Water Sampled 12/16/04 15 35 Received 12/17/04 14 00 <br /> Gasoline Range Organics(C4-C12) 60 50 ugfl 1 4120334 12/23/04 12/23/04 EPA <br /> 80158/8021B <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate 4-BFB(FID) 95% 60-140 <br /> Surrogate a a a-TFT(PID) 82% 60-140 <br /> MW-5(5412468-06)Water Sampled 12/16/04 17 20 Received 12/17/04 14 00 <br /> ' Gasoline Range Organics(C4-Cl2) ND 50 ug/l 1 4120334 12/23/04 12/23/04 EPA <br /> 801513/802113 <br /> Benzene ND 050 " <br /> Woluene ND 0 50 " <br /> thylbenzene ND 0 50 " <br /> ylenes(total) ND 050 <br /> " <br /> ' Surrogate 4-BFB(FID) 110% 60-140 ; <br /> Surrogate a,a,a-TFT(PID) 93% 60-140 " <br /> MW-3A(S412468-07)Water Sampled 12/17/04 08 00 Received 12/17/04 14 00 <br /> ' Gasoline Range Organics(C4-C12) 52 50 ug/1 1 4120334 12/23/04 12/23/04 EPA <br /> „ 8015B/8021B <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate 4-BFB(FID) 107% 60-140 " <br /> ' Surrogate a,a a-TFT(PID) 88% 60-140 " <br /> ' Sequoia Analytical-Sacramento 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 be reproduced in its entirety <br /> Page 4 of 12 <br />