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819 Sinker Ave Ste 8 <br /> Sacramento,CA 95834 <br /> Sequoia (916)92!-9640 <br /> Analytical www <br /> (9 -0140 <br /> sequotalauoiafabs wm <br /> GW yan-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 /> g <br /> Reportinn <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-6 S302221-07 Water Sampled 02/06/03 07 55 Received 02/07/03 10 30 <br /> 1 302422a 0211 S/03 021!8103 EPA 8015/8021 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> D 0 50 " <br /> Toluene N , <br /> 0 50 <br /> Ethylbenzene ND „ <br /> Xylenes(total) ND 050 " <br /> 20 " <br /> Methyl tett-butyl ether ND <br /> Surrogate a,a,a-Trifluorotoluene 82% 60-140 " <br /> U-7 S302221-08 Water Sampled 02/06103 14 45 Received 02107/03 10 30 <br /> Purgeable Hydrocarbons ND 50 ug/I 1 3020224 02/18/03 02/18/03 EPA 8015/8021 <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> 0 50 " <br /> Xylenes(total) ND „ <br /> Met 1 tert-butyl ether ND 2 0 <br /> S to a,a a-Trifluarotoluene 8691a 60-140 <br /> U-8 S302221-09 Water Sampled 02/06/03 16 20 Received 02/07/03 10 30 <br /> 1 3024224 02/!8/43 02/18/03 EPA 8015/8421 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> „ <br /> Benzene ND 050 „ <br /> Toluene ND 050 " <br /> Ethylbenzene ND <br /> 050 <br /> 0 50 <br /> Xylenes(total) ND „ <br /> Methyl tert-butyl ether <br /> ND 20 <br /> Surrogate a,a,a-Trifluorotoluene <br /> 91 % 60-140 <br /> ola Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 6 of 33 <br />