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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento, 95834 <br /> (916))921-9600 <br /> FAX(916)921-0100 <br /> 10 � Analytical <br /> wwwsequoialabs cont. <br /> SECOR International-Rancho Cordova Project TOSCO 11193,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Protect Manager Rusty Bcnkosky 12/12/01 12 35 <br /> Total Purgeable Hydrocarbons,BTEX and MTBE m Air by DHS LUFI'- Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunt Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1120065-EPA 5030B(PIT) <br /> LCS(1120065-BSl) Prepared&Analyzed 11/30/01 _ <br /> Benzene 1 96 0 050 mglW Air 200 98 0 70-130 <br /> Toluene 1 83 0 050 200 91 5 70-130 <br /> Ethylbenzene 1 73 0 050 2 00 86 5 70-130 <br /> Xylenes(total) 5 34 0 050 600 890 70-130 <br /> Methyl tert-butyl ether 1 41 050 200 705 70-130 <br /> Surrogate a a a-Trifluorotoluene 2 02 200 101 60-140 <br /> LCS Du 1120065-BSD1 ared&Analyzed 11/30/01 <br /> Benzene 1 94 0 050 mglm'Air 200 970 70-130 1 03 25 <br /> Toluene 1 81 0 050 200 905 70-130 1 10 25 " <br /> Ethylbenzene 1 75 0 050 200 875 70-130 1 15 25 <br /> Xylenes(total) 5 35 0 050 600 892 70-130 0 187 25 <br /> ethyl tert-butyl ether 1 34 0 50 2 00 670 70-130 5 09 25 Q-LIM <br /> arrogate a a a-Trifluorotoluene 209 1 00 104 60-140 4 <br /> �t quoia 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 entirety <br /> Page Page 6 of 9 <br />