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4DA819 Striker Ave Ste 8 <br /> Sequoia Sacramento, <br /> 9 <br /> 98600 <br /> Analytical FAX(916)921-0100 <br /> www.sequoialabs.com <br /> • <br /> Gettler-Ryan-Rancho Cordova Project: Fortner Unocal 0187,Stockton,CA S308456 <br /> 3140 Gold Camp Dr.,Ste. 170 Project Number: N/A Reported: <br /> Rancho Cordova CA,95670 Project Manager: Geoffrey D.Risse 09/08/03 15:29 <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 3080298-EPA 5030B(P/') <br /> Matrix Spike(3080298-MS1) Source:S308456-06 Prepared&Analyzed:08/25/03 <br /> Benzene 9.69 0.50 ug/1 10.0 ND 97 60-140 <br /> Toluene 9.69 0.50 10.0 ND 97 60-140 <br /> Ethylbenzene 9.54 0.50 10.0 ND 95 60-140 <br /> Xylenes(total) 28.3 0.50 30.0 ND 94 60-140 <br /> Methyl tert-butyl ether 10.6 2.0 10.0 ND 106 60-140 <br /> Surrogate:a,a,a-Trifluorotoluene 8.99 10.0 90 60-140 <br /> Matrix Spike Dup(3080298-MSDi) Source:5308456-06 Prepared&Analyzed: 08/25/03 _ <br /> Benzene 10.3 0.50 ug/l 10.0 ND 103 60-140 6 25 <br /> Toluene 9.77 0.50 10.0 ND 98 60-140 0.8 25 <br /> Ethylbenzene 10.1 0.50 10.0 ND 101 60-140 6 25 <br /> Xylenes(total) 30.4 0.50 30.0 ND 101 60-140 7 25 <br /> Methyl tertbutyl ether 11.4 2.0 10.0 ND 114 60-140 7 25 <br /> qlWwrrogate:a,a,a-Trifluorotoluene 9.31 10.0 93 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 8 of 9 <br />