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819 Striker Ave Su 6 <br /> Sequoia Sacramento,CA 95834 <br /> (D (916)921-96M <br /> Analytical FAX(916)921-0100 <br /> www.sequoialabs.com <br /> Ryan-Dublin Project: Fortner 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-Trimetbylbenzene) and BTEX by EPA 8015M and 8021B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Nates <br /> U-6(S306048-07)Water Sampled: 05/30/03 10:50 Received:06/02/03 13:40 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 3060085 06/06/03 06/06/03 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 tent-butyl ether ND 2.0 " <br /> Surrogate:a,a,a-Trifluorotoluene 93% 60-140 <br /> U-7(5306048-08)Water Sampled: 05/28/03 16:10 Received:0610210313:40 _ <br /> Purgeable Hydrocarbons ND 50 ug/1 1 3060085 06/06/03 06/06/03 EPA 8015/8021 <br /> Benzene 13 0.50 " <br /> Toluene 1.0 0.50 <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) ND 0.50 " <br /> Methyl tert-butyl ether 7.0 2.0 " <br /> ate:a,a,a-Trifluorotoluene 100% 60-140 <br /> U- (5306048-09)Water Sampled:05/29/03 08:20 Received:06_/0_2_103 13:_40 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 3060085 06/06/03 136/06/03 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 98% 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 basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 6 of 32 <br /> ggt <br />