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4) � <br /> 919 Stoker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4D (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www scquoralabs com <br /> *7-International-Rancho Cordova Project TOSCO 11193,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Protect Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 12/17/01 14 16 <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 Lunit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1120185-EPA 5030B /T <br /> LCS(1120185-BSI) Prepared&Analyzed 12/13/01 <br /> Benzene 980 050 ug/1 100 980 70-130 <br /> Toluene 9 57 050 100 95 7 70-130 <br /> Ethylbenzene 946 050 100 94 6 70-130 <br /> Xylenes(total) 286 050 300 953 70-130 <br /> Methyl tert-butyl ether 101 2 5 10 0 101 70-130 <br /> Surrogate a a a-Trtuorotoluene 101 100 141 60-140 <br /> Matrix Spike(1120185-MSI) Source S112024-02 Prepared&Analyzed 12/13/01 <br /> Benzene 952 050 ug/l 100 ND 95 2 60-140 <br /> Toluene 9 15 050 10 0 ND 915 60-140 <br /> Ethylbenzene 909 050 10 0 ND 909 60-140 <br /> Xylenes(total) 27 1 050 300 ND 903 60-140 <br /> Methyl tert-butyl ether 10 6 25 100 ND 106 60-140 <br /> — <br /> gate a a a-Trrfluorotoluene 949 10 0 949 60-140 <br /> Matrix Spike Dup(1720185-MSD1) Source S112024-02 Prepared&Analyzed 12/13/01 <br /> Benzene 865 050 ug/l 100 ND 86 5 60-140 958 25 <br /> Toluene 831 050 100 ND 83 1 60-140 9 62 25 A <br /> Ethylbenzene 821 050 100 ND 82 1 60-140 102 25 <br /> Xylenes(total) 248 050 300 ND 82 7 60-140 886 25 <br /> Methyl tent-butyl ether 9 88 25 100 ND 98 8 60-140 7 03 25 <br /> Surrogate a a a-Trifluorotoluene 871 100 871 60-140 <br /> 46 quota Analyhcal-Sacramento The results in Mrs report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page Page 9 of 10 <br />