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819 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)911-9600 <br /> Analytical w6)921-0I00 <br /> ww.seqw.sequoialabs.tom <br /> -Ryan-Dublin Project: Former Unocal 0187, Stockton,CA S306048 <br /> Sierra Court,Ste.J Project Number: N/A 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 /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-12(5306048-13LWater Sampled:05/28/03 08:55 Received:06/0210313:40 <br /> Purgeable Hydrocarbons 830 250 ugA 5 3060103 06/06/03 06/09/03 EPA 8015/8021 <br /> Benzene 33 2.5 " <br /> Toluene 5.3 2.5 " <br /> Ethylbenzene ND 2.5 <br /> Xylenes(total) 7.4 2.5 " <br /> Methyl tert-butyl ether 25 10 " <br /> Surrogate:a,a,a-Trifluorotoluene 107% 60-140 " <br /> U-13 (5306048-14)Water Sampled:05/28/03 09:35 Received:06/02/0313:40 <br /> Purgeable Hydrocarbons 1700 500 ug/1 10 3060103 06/06/03 06/09/03 EPA 8015/8021 <br /> Benzene 510 25 50 06/06/03 " <br /> Toluene 19 5.0 10 06/09/03 " <br /> Ethylbenzene ND 5.0 <br /> Xylenes(total) 25 5.0 <br /> Methyl tert-butyl ether ND 20 " <br /> ate:a,a,a-Trifluorotoluene 99% 60-140 " <br /> U-14(5306048-15)Water Sampled:05/30/03 11:40 Received:06/02/03 13:40 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 3060103 06/06/03 016/06/03 EPA 8015/8021 <br /> Benzene ND 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 /> Surrogate:a,a,a-Trifluorotoluene 96% 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 staled,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 8 of 32 <br />