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'Y a Sinker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAx(916)921-0E00 <br /> www sequoialabs com <br /> Weston Solutions Inc-Walnut Creek Protect San Joaquin HSA S412468 <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-9(5412468-01)Water Sampled 12/16/04 10 15 Received 12/17/04 14 00 <br /> Gasoline Range Organics(C4-C]2) ND 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) 96% 60-140 <br /> Surrogate a a a-TFT(PID) 92% 60-140 " " <br /> MW-7(541246842)Water Sampled 12/16/0411 40 Received 12/17/04 14 00 <br /> ' Gasoline Range Organics(C4-C12) ND so ug/l 1 4120334 12/23/04 12/23/04 EPA <br /> 8015B/8021B <br /> Benzene ND 050 " <br /> ND 0 50 <br /> thylbe <br /> thylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> ' Surrogate 4-BFB(FID) 102% 60-140 <br /> Surrogate a aa-TFT(PID) 92% 60-140 <br /> MW-4(5412468-04)Water Sampled 12/16/04 14 30 Received 12/17/04 14 00 <br /> ' Gasoline Range Organics(C4-C12) ND 50 ug/l 1 4120334 12/23/04 12/23/04 EPA <br /> " <br /> 8015B/8021B <br /> Benzene ND 050 <br /> Toluene ND 0 SO " <br /> ' Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate 4-BFB(FID) 97% 60-140 " <br /> Surrogate a,a,a-TFT(PID) 91 % 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 3 of 12 <br />