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819 Sinker Ave Su 8 <br /> Sequoia Sacramento CA 95834 <br /> 4D (916)921-9600 <br /> Analytical FAX quoi 921-0100 <br /> www sequoialabs com <br /> ttler-Ryan-Rancho Cordova Project Former Unocal 0187,Stockton,CA 5302535 <br /> 40 Gold Camp Dr,Ste 170 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Risse 03/07/03 17 32 <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 /> V-10(S302535-01)Water Sampled 02/21/03 06 56 Received 02/21/03 14 50 _ <br /> Purgeable Hydrocarbons 120 50 ugh 1 3020394 03/04/03 03/04/03 EPA 8015/8021 <br /> Benzene 16 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 2 0 " <br /> Surrogate a,a,a-Trifluorotoluene 102% 64-140 " <br /> NP-2-22(S302535-02)Water Sampled 02/21/03 07 07 Received 02/21/03 14 50 <br /> Purgeable Hydrocarbons 120 50 ug/1 1 3020394 03/04/03 03/04/03 EPA 8015/8021 <br /> Benzene 14 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> _0ogate a a a-Trifluorotoluene 92% 60-140 " <br /> .2-60(5302535-03)Water Sampled 02/21/03 07 12 Received 02/21/0314 50 <br /> Purgeable Hydrocarbons 140 50 ugll 1 3020394 03/03/03 03/04/03 EPA 8015/8021 <br /> Benzene 18 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether 3 9 2 0 " <br /> Surrogate a,a,a-Trifluorotoluene 89% 60-140 " <br /> oia 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 bases <br /> This analytical report must be reproduced in its entirety <br /> Page 3 of 9 <br />