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Sequoia 819 Sinker Ave Ste <br /> Sacramento,CA 9583 <br /> Analytical (916)921-960 <br /> FAX(916)92"10 <br /> 0 <br /> www sequoialabs co <br /> Weston Solutions,Inc-Walnut Creek Project San 7oaqum HSA 5409335 <br /> 1575 Treat Blvd,Ste 212 Project Number N/A Reported <br /> Walnut Creek CA,94596 Project Manager Greg Berner Menna 09/30/04 11 52 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B18O21B <br /> Sequoia Analytical-Sacramento <br /> 1 <br /> Reporting <br /> Analyte Result Lirnit Units Dilution Batch Prepared Analyzed Method Notes <br /> H-TANK(5409335-04)Water Sampled 09/15/04 1135 Received 09/16/04 12 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/I 1 4090320 09/21/04 09/21/04 EPA <br /> 8015B/802IB <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl cert-butyl ether ND 20 " « <br /> Surrogate 4-BFB(FID) 90% 60-140 <br /> Surrogate a,a,a-TFT(P1D) 88% 60-140 » <br /> EB-1(5409335-05)Water Sampled 09/15/04 15 15 Received 09/16/04 12 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ugll 1 4090320 09/21/04 09/21/04 EPA <br /> 8015B/8021 B <br /> Benzene 15 050 <br /> Toluene ND 050 <br /> Ethylbenzene 053 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate 4-BFB(FID) 110% 60-140 <br /> Surrogate a a a-TFT(AID) 101 % 60-140 <br /> 1 <br /> Sequoia Analytical-Sacramento The results in this analyzed report apply to the samples lY zed in accordance with the chain <br /> p p P <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 4 of 8 <br /> i <br />