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819 Striker Avenue Suite 8 <br /> Sacramento )9 90 <br /> Sequoia (916)921-9609600 <br /> Analytical PAX(9l6)92l 0 10 <br /> www sequoialabs com <br /> SECOR International-Rancho Cordova Project TOSCO 8671,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/14/02 15 16 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lima Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1120362-EPA 5030B(P/T) <br /> Blank(1120362-BLK1) Prepared&Analyzed 12/27/01 <br /> Purgeable Hydrocarbons ND 050 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 0 0050 " <br /> Xylenes(total) ND 0 0050 " <br /> Methyl tert-butyl ether ND 0 0050 " <br /> Surrogate a a a-Treuorotoluene 00195 00200 975 60-140 <br /> LCS(1120362-BSI) Prepared&Analyzed 12/27/01 <br /> Benzene 00181 0 0050 mglkg 00200 905 70-130 <br /> Toluene 00172 0 0050 00200 860 70-130 <br /> Ethylbenzene 00182 00050 00200 91 0 70-130 <br /> Xylenes(total) 00522 0 0050 00600 870 70-130 <br /> ethyl tert-butyl ether 00172 00050 00200 860 70-130 <br /> Surrogate a a a-Tr fluorotoluene 00196 00200 980 60-140 <br /> Matrix Spike(1120362-MSI) Source 5112296-04 Prepared 12/27/01 Analyzed 12/28/01 <br /> Benzene 00146 00050 mg/kg 00200 ND 73 0 60-140 <br /> Toluene 00136 00050 00200 ND 68 0 60-140 <br /> Ethylbenzene 00144 00050 00200 ND 720 60-140 <br /> Xylenes(total) 00412 00050 00600 ND 68 7 60-140 <br /> Methyl tert-butyl ether 00160 00050 00200 ND 80 0 60-140 <br /> Surrogate a a a-TriJluorotoluene 00160 00200 800 60-140 <br /> equoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page Page 21 of 27 <br />