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819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> 4D (916)921-9600 <br /> 1, Analytical <br /> FAX(9I6)921-0 100 <br /> www sequocalabs com <br /> SECOR International-Rancho Cordova Project TOSCO 11192,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager, Rusty Benkosky 12/18/01 18 10 <br /> Total Purgeable Hydrocarbons,BTEX and MTBE in Air(ppmv) by DHS LUI+r <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> INF#MW-715112028-041 Air_ Sampled, 12/03/01 12.00 Received 12/04/0108 45 <br /> Purgeable Hydrocarbons ND 56 ppmv 20 1120107 12/06/01 12/06/01 DHS LUFT <br /> Benzene ND 032 <br /> Toluene 083 026 " <br /> Ethylbenzene 024 024 <br /> Xylenes(total) 18 024 " <br /> Methyl tert-butyl ether 66 2 8 <br /> Surrozate a a a-Trifluorotoluene 640% 60-140 " <br /> EFF#1(5112028-05)Air Sampled 12/03/0111 55 Received 1210410108 45 _ <br /> Purgeable Hydrocarbons ND 2 8 ppmv 1 1120107 12/06/01 12/06/01 DHS LUFT <br /> Benzene ND 0 016 " " " <br /> Toluene ND 0 013 <br /> Ethylbenzene ND 0 012 " <br /> Xylenes(total) ND 0 012 <br /> ethyl tert-butyl ether ND 0 14 " <br /> urroeate a a a-Trifluorotoluene 790% 60-140 " <br /> INF#MW-3(S112028-06)Air Sampled. 12/03/0114.39 Received, 1Z/04/01,9,6.45 <br /> Purgeable Hydrocarbons ND 280 ppmv 100 1120107 12/06/01 12/06/01 DHS LUFT <br /> Benzene ND 16 " <br /> Toluene ND 13 <br /> Ethylbenzene ND 12 " <br /> Xylenes(total) 2 8 12 " <br /> Methyl tert-butyl ether 440 14 " <br /> Surrogate a a a-Tri/luorotoluene 615% 60-140 " <br /> uola 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 he reproduced in its entirety <br /> Page Page 3 of 10 <br />