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819 Sinker Ave Ste 8 <br /> Sacramento.CA 95934 <br /> Sequoia (915)92921-96-96 <br /> 00 <br /> I%W Analytical www <br /> seq 5) labs2 1 co 0 <br /> www sequoialahs com <br /> Ryan-Dublin Project Former Unocal 0187,Stockton,CA S302221 <br /> 6747 Sierra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 02/28/03 19 02 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-24 S302221-25 Water Sampled 02/05/03 11 25 Received 02/07/03 10 30 <br /> Purgeable Hydrocarbons ND 50 ugA 1 3020224 02/18/03 02/19/03 EPA 8015/8021 <br /> Benzene <br /> ND 050 " " " " " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 20 " <br /> Surrogate a,a,a-TriJluoratoluene <br /> 86% 60-140 <br /> U-25 S302221-26 Water Sampled 02/05/03 10 50 Received 02/07/03 10 30 <br /> Purgeable Hydrocarbons ND 50 ugA 1 3020224 02/18/03 02/19/03 EPA 8015/8021 <br /> Benzene ND 050 „ <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 „ <br /> Methyl tent-butyl ether ND 2 0 <br /> Mate a,a,a-Trifluorotoluene <br /> 93911, 60-140 " <br /> U-26 S302221-27 Water Sampled 02/06/03 14 15 Received 02/07/03 10 30 <br /> Purgeable Hydrocarbons ND 50 ugA 1 3020224 02/18/03 02/19/03 EPA 8015/8021 <br /> Benzene <br /> 1 7 050 <br /> „ <br /> 0 50 <br /> 1 8 <br /> Toluene „ <br /> " <br /> Etliylbenzene 051 050 „ <br /> Xylenes(total) <br /> 31 050 <br /> Methyl tett-butyl ether <br /> ND 20 <br /> Surrogate a,a,a-Tri luorotoluene 94 % 60-140 " <br /> ota Analytical - Sacramento The results in this i epoi r apply ro the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stared results are reported on a wet weight basis <br /> This analytical report Hurst be reproduced in its entirety <br /> Page 12 of 33 <br />