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819 <br /> Ave Ste 8 <br /> Sequoia Sacramento, <br /> CA 95834 <br /> Saerant(916 92 95834 <br /> (916)921-9600 <br /> -0 100 <br /> iW Analytical <br /> FAX(916)92 s.com <br /> www.sequaialabs.com <br /> 0 <br /> Gettler-Ryan-Dublin Project: Former Unocal 0187,Stockton,CA 5309067 <br /> 6747 Sierra Court,Ste.] Project Number: N/A Reported: <br /> Dublin CA,94568 Project Manager: Deanna L.Harding 09/15/03 16:39 <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 %RFC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3090052-EPA 5030B PIT <br /> Blank(3090052-BLKI) Prepared&Analyzed:09/04/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <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-Tris luoroioluene 8.34 10.0 83 60-140 <br /> Blank(3090052-BLK2) Prepared&Analyzed:09/05/03 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Beaune 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 9.16 10.0 92 60-140 <br /> Laboratory Control Sample(3090052-BSI) Prepared&Analyzed:09/04/03 <br /> Benzene 9.93 0.50 119/1 10.0 99 70-130 <br /> Toluene 9.90 0.50 10.0 99 70-130 <br /> Ethylbenzene 9.72 0.50 10.0 97 70-130 <br /> Xylenes(total) 28.4 0.50 30.0 95 70-130 <br /> Methyl tert-butyl ether 9.29 2.0 10.0 93 70-130 <br /> Surrogate:a,a,a-Trifluorotoluene 9.36 10.0 94 60-140 <br /> Laboratory Control Sample(3090052-BS2) Prepared&Analyzed:09/05/03 <br /> Benzene 9.46 0.50 ug/! 10.0 95 70-130 <br /> Toluene 9.58 0.50 10.0 96 70-130 <br /> Etbylbenzene 9.52 0.50 10.0 95 70-130 <br /> Xylenes(total) 27.9 0.50 30.0 93 70-130 <br /> Methyl tert-butyl ether 8.17 2.0 10.0 82 70-130 <br /> Surrogate:a,a,o-Trifluorotoluene 8.63 10.0 86 60-140 <br /> Sequoia 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 23 of 29 <br />