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�+ 819 Striker Ave Su 8 <br /> ►7 <br /> e uoia Satxamc916 92 95834 <br /> Analytical ww.seqww.soqFAX 6)921-0loo <br /> wuoialabs.com <br /> -Ryan-Dublin Project: Former Unocal 0187,Stockton,CA S306048 <br /> 67 7 Sierra Court,Ste,J 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 - 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 3060103-EPA 50308 P <br /> Laboratory Control Sample(3060103-BS2), Prepared& Analyzed:06/09/03 <br /> Surrogate:a,a.a-Trifluorotoluene 9.32 ug/1 10.0 93 60-140 <br /> Laboraten Control Sample(3060103-BS3) Prepared&Analyzed:06/10/03 <br /> Benzene 9.33 0.50 ug/l 10.0 93 70-130 <br /> Toluene 9.49 0.50 10.0 95 70-130 <br /> Ethylbenzene 9.62 0.50 10.0 96 70-130 <br /> Xylenes(total) 27.3 0.50 30.0 91 70-130 <br /> Methyl tert-butyl ether 8.84 2.0 " 10.0 88 70-130 <br /> Surrogate:a,a,a-Triuorotoluene 8.85 10.0 88 60-140 <br /> llg�x Spike(3060103-MSI) Source:S306048-12 Prepared&Analyzed:06/09/03 <br /> e 10.4 0.50 ugA 10.0 ND 104 60-140 <br /> Toluene 10.6 0.50 10.0 ND 106 60-140 <br /> Ethylbenzene 10.3 0.50 10.0 ND 103 60=140 <br /> Xylenes(total) 29.7 0.50 30.0 ND 99 60-140 <br /> Methyl tert-butyl ether 11.8 2.0 10.0 ND 118 60-140 <br /> Surrogate:a,a,a-Trifluorotoluene 8.71 10.0 87 60-140 <br /> Matrix Spike Du (3060103-MSDI) Source: 5306048-12 Prepared&Analyzed: 06/09/03 <br /> Benzene 10.9 0.50 ugll 10.0 ND 109 60-140 5 25 <br /> Toluene 11.0 0.50 10.0 ND 110 60-140 4 25 <br /> Ethylbenzene 10.8 0.50 10.0 ND 108 60-140 5 25 <br /> Xylenes(total) 31.1 0.50 30.0 ND 104 60-140 5 25 <br /> Methyl tent-butyl ether 12.7 2.0 10.0 ND 127 60-140 7 25 <br /> Surrogate:a,a,a-Trifluorotoluene 9.74 10.0 97 60-140 <br /> Batch 3060148-EPA 5030B (PIT <br /> Blank(3060148-BLK1) Prepared&Analyzed:06/10/03 <br /> Purgeable Hydrocarbons ND 50 ugA <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <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 stared,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 26 of 32 <br />