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oil , <br /> 819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento,GA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoralabs com <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 Project Mpg- Rusty Benkosky 12/12/01 12 35 <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 1120068-EPA 5030E(PIT) <br /> Blank(1120068-BLK1)_ _ _ _ Prepared&Analyzed 12/05/01 T <br /> Purgeable Hydrocarbons ND 50 u9/1 <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tent-butyl ether ND 25 " <br /> Surrogate a a a-Tnfluorotoluene 976 100 976 60-140 <br /> LCS 8-BS1) Prepared d&Analyzed 12/05/0I <br /> a ..,,.,,..._, <br /> Benzene 9 65 050 119/1 100 965 70-130 ' <br /> Toluene 928 050 10 0 928 70-130 <br /> Ethylbenzene 936 0 50 10 0 936 70-130 <br /> ylenes(total) 279 0 50 300 930 70-130 <br /> ethyl tert-butyl ether 985 2 5 100 985 70-130 <br /> Surrogate a a a-Trifluorotoluene 984 100 984 60-140 <br /> Matnx Spikes 120068-MS-1)_ _ __ Source S111421-07 Prepared&Analyzed 12/05/01 <br /> Benzene 12 1 0 50 ug/1 ]0 0 2 3 990 60-140 <br /> Toluene 965 0 50 100 ND 965 60-140 <br /> Ethylbenzene 956 0 50 100 ND 956 60-140 <br /> Xylenes(total) 29 1 050 300 ND 970 60-140 <br /> Methyl tert-butyl ether 103 2 5 100 91 120 60-140 <br /> Surrogate a,a,a-Trifluorotoluene 914 100 914 60-140 <br /> Matnx Spike Dup(1120068-MSDI) Source 5111421-07 Prepared&Analyzed 12/05/01 <br /> Benzene 116 050 119/1 100 2 3 930 60-140 422 25 <br /> Toluene 921 0 50 10 0 ND 92 1 60-140 4 67 25 <br /> Ethylbenzene 9 14 050 100 ND 914 60-140 449 25 <br /> Xylenes(total) 27 9 050 300 ND 930 60-140 421 25 <br /> Methyl tert-butyl ether 100 25 10 0 91 900 60-140 2 96 25 <br /> Surrogate a a a-Triuorotoluene 8 73 100 873 60-140 <br /> quota 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 8 of 9 <br />