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41 � <br /> 819 Striker Avenue,Scute 8 <br /> Sequoia Sacramento,CA 95834 <br /> `i (916)921-9600 <br /> QP Analytical FAX(916)921-0100 <br /> www sequotalabs corn <br /> SECOR International-Rancho Cordova Project ARCO 4493,Stockton,CA <br /> 3017 Kilgore Road,Scute 100 P%lect Number 4493,Stockton,CA Reported <br /> Rancho Cordova CA,95670 P%leax 8- Rusty Benkosky 04/10/02 16 29 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Lunits RAD Lrrnit Notes <br /> Batch 2030252-EPA 5030B [P/TI <br /> Blank 2030252-BLK1 Prepared&Analyzed 03/20/02 <br /> trans-l,2-Dichloroethene ND 0 50 119/1 <br /> 1,2-Dichloropropane ND 0 50 " <br /> 1,3-Dichloropropane ND 050 " <br /> 2,2-Dichloropropane ND 0 50 " <br /> I,I-Dichloropropene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Hexachlorobutadiene ND 10 " <br /> lsopropylbenzene ND 0 50 " <br /> p-lsopropyltoluene ND 0 50 " <br /> Methylene chloride ND 1 0 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Naphthalene ND 10 " <br /> Propylbenzene ND 0 50 " <br /> yrene ND 0 50 " <br /> 1,1,1,2-Tetrachloroethane ND 0 50 " <br /> 1,1,2,2-Tetrachloroethane ND 1 0 " <br /> Tetrachloroethene ND 0 50 " <br /> Toluene ND 0 50 " <br /> 1,2,3-Tnehlorobenzene ND 0 50 " <br /> 1,2,4-Tnchlorobenzene ND 0 50 " <br /> 1,1,1-Tnchloroethane ND 0 50 " <br /> 1,1,2-Tnchloroethane ND 0 50 " <br /> Trichloroethene ND 050 " <br /> Tnchlorofluoromethane ND 0 50 " <br /> 1,2,3-Tnehloropropane ND 1 0 " <br /> 1,2,4-Trimethylbenzene ND 0 50 <br /> 1,3,5-Tnmethylbenzene ND 0 50 " <br /> Vinyl chloride ND 0 50 " <br /> Total Xylenes ND 0 50 " <br /> Surrogate 12-DCA-d4 188 250 75 2 60-140 <br /> Surrogate Dibromofluoromethane 211 250 844 70-130 <br /> Surrogate 12-DCA-d4 188 250 75 2 70-130 <br /> Surrogate Toluene-d8 21 1 250 844 70-130 <br /> Surrogate 4-BFB 223 250 892 70-130 <br /> �equoia 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 22 of 27 <br />