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rY' Sinker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> 00 <br /> Analytical (9'6)9210600 <br /> FAX 915 i <br /> www sequoialabs com <br /> Weston Solutions Inc-Walnut Creek Project San Joaquin HSA S412468 <br /> ' 1575 Treat Blvd,Ste 212 Project Number N/A Reported <br /> Walnut Creek CA,94596 Project Manager Michelle Zehr 01104105 13 32 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B <br /> 1 Sequoia Analytical-Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> ' MW-2A(S412468-08)Water Sampled 12/17/0410 05 Received 12/17/0414 00 <br /> Gasoline Range Organics(C4-C12) 2000 50 ug/l 1 4120334 12/23/04 12/23/04 EPA <br /> 8015B/8021B <br /> ' Benzene 78 050 " <br /> Toluene ND 050 <br /> Ethylbenzene 93 050 " <br /> Xylenes(total) 94 050 " <br /> ' Surrogate 4-BFB(FID) 659% 60-140 S07 <br /> Surrogate a aa-TFT(PID) 106% 60-140 " <br /> MW-2(5412468-09)Water Sampled 12/17/04 10 35 Received 12/17/04 14 00 <br /> ' Gasoline Range Organics(C4-C12) 15000 5000 ug/l 100 4120334 12/23/04 12/23/04 EPA <br /> 8015B/8021B <br /> Benzene 8900 50 " <br /> a ND 50 <br /> thyl <br /> thylbenzene 100 50 <br /> Xylenes(total) ND 50 " <br /> Surrogate 4-BFB(FID) 109% 60-140 <br /> Surrogate a a a-TFT(PID) 91 % 60-140 " <br /> MW-2D(S412468-10)Water Sampled 12/17/0410 40 Received 12/17/04 14 00 <br /> ' Gasoline Range Organics(C4-C12) 14000 5000 ugll 100 4120334 12/23/04 12/23/04 EPA <br /> 801513/8021B <br /> Benzene 8700 50 " <br /> Toluene ND SQ <br /> ' Ethylbenzene 110 50 <br /> Xylenes(total) ND 50 <br /> Surrogate 4-BFB(FID) 1.21% 60-140 " <br /> Surrogate a a a-TFT(PID) 93% 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 5 of 12 <br />