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819 Stnker Ave Ste 8 <br /> Sequoia Sacratn(91 92 95834 <br /> 96Mtz� <br /> (915)921-9600 <br /> � Analytical wwseqFAX 6) labsca2 1 0 <br /> www sequoiala6s cam <br /> Gettler-Ryan-Dublin <br /> Project Former Unocal 2859,Stockton,CA -S303055, <br /> 6747 Sierra Court,Ste ] Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 03/19/03 18 34 , <br /> Gasoline (2-Methylpentane to 1,2,1-Trimetllylbenzene) 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 /> MW-6(S303055-07)Water Sampled 02/27/03 12 40 Received 03/03/03 12 15 <br /> Purgeable Hydrocarbons ND 50 ug/l - r 1 3030129 03/10/03 03/10/03 EPA 8015/8021 <br /> Benzene ND 0 50 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a,a,a-Trifluorotoluene 74% 60-140 <br /> , <br /> MW-7 S303055-08 Water Sampled 02/28/03 17 20 Received 03/03/03 12 15 <br /> Purgeable Hydrocarbons ND 50 ugll 1 3030129 03/10/03 03/10/03 EPA 8015/9021 <br /> Benzene ND 050 " <br /> TolueneND 050 " <br /> Ethylbenzene N ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether -ND , _ , 20, " <br /> Surrogate a a a-Trifluorotoluene 92% 60-140 <br /> MW-8 5303055-04 Water Sampled 02/28/03 15 25 Received 03/03/03 12 15 <br /> Purgeable Hydrocarbons ND 50 ugA 1 3030129 03!10/03 03/10/03 EPA 80151$021 <br /> Benzene ND 050 <br /> Toluene —ND 0 50 " <br /> TEthylbenzene ND 050 <br />.Xylenes(total) T-. - _ND_ -_ ., -Q 50 <br /> Methyl tert-butyl ether ND 20 <br />—Surrogate a',a;a=Triflu'orotoluene — --`-- --- —81°/r,-60-140 <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accor dance with the chain-IV <br /> custody document Unless otherwise stated results are reported ort a ViTt weight basis <br /> This anahmcal report must be reproduced in its entirety <br /> Page 5 of 24 <br />