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819 Striker Ave Ste 8 <br /> Sacramento,CA 95834 <br /> Sequoia (9 16)921-96M <br /> 4DFAX(916)921-0100 <br /> Analytical www.sequoialabs.com <br /> S <br /> Gettier-Ryan-Dublin Project: Former Unocal 0187,Stockton,CA 5309067 <br /> Project Number: NIA Reported: <br /> 6747 Sierra Court,Ste.J 09/15/03 16:39 <br /> Dublin CA,94568 Project Manager: Deanna L. !larding <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B - Quality Contr <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3090052-EPA 5030B PIT <br /> Matrix Spike(3090052-MSI) Source:S309067-06 Prepared&Analyzed: 09/04/03 <br /> Benzene 9.27 0.50 ug/l 10.0 ND 93 60-140 <br /> Toluene 9.10 0.50 10.0 ND 91 60-140 <br /> Ethylbenzene 8.98 0.50 10.0 ND 90 60-140 <br /> Xylenes(total) 25.6 0.50 30.0 ND 85 60-140 <br /> Methyl tert-butyl ether 9.23 2.0 10.0 ND . 92 60-140 <br /> Surrogate:aa,a-Trifluorotoluene 8.38 10.0 84 60-140 <br /> Matrix Spike Du (3090052-MSDI) Source:5309067-06 Prepared&Analyzed:09/04/03 <br /> Benzene 9.88 0.50 ug/l 10.0 ND 99 60-140 6 25 <br /> Toluene 9.83 0.50 10.0 ND 98 60-140 8 25 <br /> Ethylbenzene 9.68 0.50 10.0 ND 97 60-140 8 25 <br /> X_&(` tal) 28,0 0.50 30.0 ND 93 60-140 9 25 <br /> Me��rert-butyl ether 9.69 2.0 10.0 ND 97 60-140 5 25 <br /> Surrogate:aa,a-Trifluorotoluene 9.00 10.0 90 60-140 <br /> Batch 3090053-EPA 5030B(PIT <br /> Blank(3090053-BLKI) Prepared&Analyzed:09/04/03 <br /> Purgeable Hydrocarbons ND 50 ugll <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) <br /> ND 0.50 " <br /> Methyl tert-butyl ether ND 2.0 <br /> Surrogate:a,a,a-Trifluorotoluene 9.95 10.0 100 60-140 <br /> Blank(3090053-BLK2) Prepared&Analyzed:09/05/03 <br /> Purgeabie Hydrocarbons ND 50 ugll <br /> Benzene <br /> ND 0.50 " <br /> Toluene <br /> ND 0.50 " <br /> Ethylbettzene <br /> ND 0.50 " <br /> Xylenes(total) <br /> ND 0.50 <br /> Methyl tert-butyl ether <br /> ND 2.0 " <br /> Surrogate:0,0,a-Trifluorotoluene 11.0 10.0 I10 60-140 <br /> 5 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 24 of 29 <br /> i <br />