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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,)9 95834 <br /> Analytical FAx(916)921.9600 <br /> (916)921-0100 <br /> www sequoialabs cam <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 Pivject Manager Rusty Benkosky 01/23/02 17 08 <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 Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2010249-EPA 5030B P/T <br /> Blank 2010249-BLK1) Prepared&Analyzed 01/16/02 <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 050 " <br /> Methyl tert-butyl ether ND 2 5 <br /> Surrogate a a a-Trifluorotoluene 8 16 100 81 6 60-140 <br /> LCS(2010249-BS1) Prepared&Analyzed 01/16/02 <br /> Benzene 8 62 0 50 ug/1 10 0 962 70-130 <br /> Toluene 8 it 0 50 10 0 81 1 70-130 <br /> Ethylbenzene 8 43 0 50 10 0 843 70-130 <br /> W <br /> ylenes(total) 24 1 0 50 30 0 803 70-130 <br /> ethyl tert-butyl ether 9 05 2 5 10 0 90 5 70-130 <br /> Surrogate a a a-Trifluorotoluene 790 10 0 790 60-140 <br /> Matrix Spike(2010249-MSI) Source 5201151-17 Prepared 01/16/02 Analyzed 01/17/02 <br /> Benzene 8 62 0 50 ug/1 10 0 ND 862 60-140 <br /> Toluene 798 0 50 10 0 ND 798 60-140 <br /> Ethylbenzene 8 34 0 50 10 0 ND 83 4 60-140 <br /> Xylenes(total) 23 6 0 50 30 0 ND 78 7 60-140 <br /> Methyl tert-butyl ether ND 2 5 100 ND 60-140 QM-07 <br /> Surrogate a a a-Tris luorotoluene 734 100 73 4 60-140 <br /> Matrix Spike Dup(2010249-MSD1) Source S201151-17 Prepared 01/16/02 Analyzed 01/17/02 -, <br /> Benzene 9 44 050 ug/1 10 0 ND 944 60-140 908 25 <br /> Toluene 8 81 0 50 10 0 ND 88 1 60-140 989 25 <br /> Ethylbenzene 9 19 0 50 10 0 ND 91 9 60-140 9 70 25 <br /> Xylenes(total) 262 050 30 0 ND 87 3 60-140 104 25 <br /> Methyl tert-butyl ether 7 55 2 5 100 ND 75 5 60-140 25 QR-07 <br /> Surrogate a a a-Trifluorotoluene 7 74 100 774 60-140 <br /> ,*Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed to accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 4 of 6 <br />