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t <br /> 9 <br /> 819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento,C9 99600 <br /> 4 4D Analytical (916)921-9600 <br /> FAX(916)921-0100 <br /> www sequotalabs com <br /> SECOR International-Rancho Cordova Project TOSCO 11192,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Piolect Manager Rusty Benkosky 01/02-102 16 41 <br /> Total Purgeable Hydrocarbons,BTEX and MTBE m Air 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 1120087-EPA 5030B(Pn) <br /> Blank(1120087-BLKI) Prepared&Analyzed 12/04/01 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 0 050 " <br /> Toluene ND 0 050 " <br /> Ethylbenzene ND 0 050 " <br /> Xylenes(total) ND 0 050 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Surrogate a,a a-Trifluorotoluene 196 200 980 60-140 <br /> LCS(1120087-BSI) Prepared&Analyzed 12/04/01 <br /> Benzene 1 84 0 050 mg/m'Air 200 92 0 70-130 <br /> Toluene 1 91 0 050 2 00 95 5 70-130 <br /> Ethylbenzene 1 94 0 050 200 97 0 70-130 <br /> Xylenes(total) 5 30 0 050 600 88 3 70-130 <br /> Methyl tert-butyl ether 2 14 0 50 200 107 70-130 . <br /> Surrogate a a a-Trifluorotoluene 1 95 200 975 60-140 <br /> LCS Dup(1120087-BSD1) Prepared&Analyzed 12/04/01 <br /> Benzene 1 96 0 050 mg/m'Air 200 98 0 70-130 .6 32 25 <br /> Toluene 2 03 0 050 200 102 70-130 6 09 25 <br /> Ethylbenzene 2 07 0 050 2 00 104 70-130 6 48 25 <br /> Xylenes(total) 5 72 0 050 600 95 3 70-130 7 62 25 <br /> Methyl tert-butyl ether 2 29 0 50 200 114 70-130 677 25 <br /> Surrogate a a a-Trifluorotoluene 200 200 100 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 Thts analytical report must be reproduced in its entirety. <br /> Page Page 6 of 10 <br />