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triker <br /> Ave SSequoia Sacrs =to, <br /> CA 95 <br /> Analytical (916)921-9 <br /> FAX(916)921-0 <br /> www sequotalabs <br /> Weston Solutions Inc-Walnut Creek Project San Joaquin 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 8015B18021B <br /> Sequoia Analytical-Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method No <br /> MW-9(5409335-01)Water Sampled 09/15/04 10 40 Received 09/16/04 12 30 <br /> Gasoline Range Organics(C4-C12) ND 50 ug/l 1 4090320 0912I/04 09/21/04 EPA <br /> 8015B/8021B <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Surrogate 4-BFB(FID) 101 % 60-140 " <br /> Surrogate a,a,a-TFT(P1D) 106% 60-140 " <br /> 14W-2A(S409335-02)Water Sampled 09/15/041240 Received 09/16/04 12 30 <br /> Gasoline Range Organics(C4-C12) 1400 50 ug11 1 4090320 09/21/04 09/21/04 EPA <br /> 8015B/8021B <br /> Benzene 13 050 " <br /> Toluene 2 3 0 50 <br /> Ethylbenzene 4 9 0 50 <br /> Xylenes(total) 4 8 0 50 " <br /> r Surrogate 4-BFB(FID) 165% 60-140 <br /> Surrogate a a a-TFT(PID) 115% 60-140 " <br /> MW-2(5409335-03)Water Sampled 09/15/04 13 15 Received 09/16/04 12 30 <br /> Gasoline Range Organics(C4-C12) 22000 10000 ug/l 200 4090320 09/21/04 09/21/04 EPA <br /> 8015B/802IB <br /> Benzene 11000 100 " <br /> Toluene ND 100 " <br /> Ethylbenzene 440 100 <br /> Xylenes(total) 470 100 " <br /> Surrogate 4-BFB(FID) 116% 60-140 " <br /> Surrogate a a a-TFT(PID) 104% 60-140 " <br /> r <br /> r <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the cho <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 3 c <br />