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819 Striker Ave Ste 8 <br /> Sequoia Sacranwnto,CA 95834 <br /> (916)921-9600 <br /> Analytical w6)921-0100 <br /> ww.seqw.sequoialabs.cam <br /> -Ryan-Dublin Project: Former Unocal 0187,Stockton,CA 5306048 <br /> 6 Sierra Court,Ste.] Project Number: NIA Reported: <br /> Dublin CA,94568 Project Manager. Deanna L.Harding 06/16/03 15:43 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B <br /> Sequoia Analytical - Sacramento <br /> Repotting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-18 5306048-19 Water Sarn led:05/28/0311:55 Received:06/02/0313:40 <br /> Purgeable Hydrocarbons 56 50 ugA 1 3060103 06/10/03 06/10/03 EPA 8015/8021 <br /> Benzene 2.2 0.50 <br /> Toluene 0.67 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 <br /> Methyl tert-butyl ether 2.5 2.0 <br /> Surrogate:a,a,a-Trifluorotoluene 101 % 60-140 <br /> U-19 S306049-20 Water Sampled:05/28/0310:35 Received:0610210313:40 <br /> Purgeable Hydrocarbons 180 100 ug/1 2 3060103 06/10/03 06/10/03 EPA 8015/8021 <br /> Benzene 55 1.0 " <br /> Toluene 1.2 1.0 " <br /> Ethylbenzene ND 1.0 " <br /> Xylenes(total) ND 1.0 " <br /> Methyl tert-butyl ether ND 4.0 " <br /> 4F—e <br /> :a,a,a-Trifluorotoluene 100% 60-140 " <br /> U-20 S306048-21 Water Sampled:05/29/0314:35 Received:06/0210313:40 <br /> Purgeable Hydrocarbons 120 50 ug/l 1 3060103 06/09/03 06/09/03 EPA 8015/8021 <br /> Benzene 14 0.50 " <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) 1.6 0.50 " <br /> Methyl tert-butyl ether ND 2.0 " <br /> Surrogate:a,a,a-Trifluorotoluene 96% 60-140 " <br /> la Analytical - Sacramcnto 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 analyrical report must be reproduced in its entirety. <br /> Page 10 of 32 b <br /> - <br />