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819 Sinker Avenue,Suite 8 <br /> -Sequoia Sacramento,CA 95834 _ <br /> `1 (916)921-%M <br /> Analytical FAX(916)921-0100 <br /> NWwww sequoialabs oom <br /> SECaR International-Rancho Cordova Project Tosco 1205,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manage►' Rusty Benkosky 04/12/02 16 39 <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 2040082-EPA 5030B(PIT) <br /> Blank(2040082-BLK1) Prepared&Analyzed 04/04/02 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Tri luorotoluene 9 77 100 977 60-140 <br /> LCS(2040082-BS1) Prepared&Analyzed 04/04/02 <br /> Benzene 7 81 050 u9A 100 781 70-130 <br /> Toluene 8 61 050 " 10 0 $61 70-130 <br /> Ethylbenzeno 9 46 050 " 10 0 94 6 70-130 <br /> Xylenes(total) 294 0 50 " 30 0 980 70-130 <br /> Methyl tert-butyl ether too 2 5 " 100 100 70-130 <br /> Surrogate a a a-Trifluorotoluene 109 100 109 60-140 <br /> Matna Spike(2040082-MSI) Source 8204016-08 Prepared&Analyzed 04/04/02 <br /> Benzene 7 94 050 ug/1 10 0 ND 79 4 60-140 <br /> Toluene 8 84 050 " 100 ND 884 60-140 <br /> Ethylbenzene 9 75 050 100 ND 975 60-140 <br /> Xylenes(total) 309 050 300 ND 103 60-140 <br /> Methyl tert-butyl ether 109 2 5 10 0 ND 104 60-140 <br /> Surrogate a a a-Trifluorotoluene 103 100 103 60-140 <br /> Matrix mike Dup(2040082-MSD1) Source 5204016-08 PERared&Analyzed 04/04/02 <br /> Benzene 8 28 050 ug/l 100 ND 82 8 60-140 419 25 <br /> Toluene 9 11 050 10 0 ND 91 1 60-140 3 01 25 <br /> Fthylbenzene 100 050 10 0 ND 100 60-140 2 53 25 <br /> Xylenes(total) 31 2 050 300 ND 104 60-140 0 966 25 <br /> Methyl tert-butyl ether 11 5 2 5 " 100 ND 110 60-140 5 36 25 <br /> Surrogate a a a-Trifluorotoluene 109 11100 109 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entire <br /> Page Page 11 of 14 <br />