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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs corn <br /> SECOR International-Rancho Cordova Project. ARCO 4493,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 4493,Stockton,CA Repot <br /> Rancho Cordova CA,95670 PWj-t Manager 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 Limits RPD Limit Notes <br /> Batch 2030283-EPA 5030B [PITT <br /> Blank(2030283-BLKI) Preared 03/22/02 Analyzed 03/23/02 <br /> trans-1,2-Dichloroethene ND 050 ugA <br /> 1,2-Dichloropropane ND 0 50 " <br /> 1,3-Dichloropropane ND 0 50 " <br /> 2,2-Dichloropropane ND 0 50 " <br /> 1,1-Dichloropropene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Hexachlorobutadiene ND 10 " <br /> isopropylbenzene ND 0 50 " <br /> p-Isopropyltoluene ND 0 50 " <br /> Methylene chlonde ND 1 0 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Naphthalene ND 10AffiPr " <br /> opylberizene ND 0 50 „ <br /> 140"ne ND 0 50 <br /> 1,1,1,2-Tetrachloroethane ND 0 50 " <br /> 1,1,2,2-Tetrachloroethane ND 10 " <br /> Tetrachloroethane ND 0 50 " <br /> Toluene ND 0 50 " <br /> 1,2,3-Tnchlorobenzene ND 0 50 " <br /> 1,2,4-Tnchlotvbenzene ND 0 50 " <br /> 1,1,1-Trichloroethane ND 0 50 " <br /> 1,1,2-Tnchloroethane ND 0 50 " <br /> Tnchloroethene ND 0 50 " <br /> Tnchlorofluoromethane ND 0 50 " <br /> 1,2,3-Tnchloropropane ND 10 " <br /> 1,2,4-Tnmethylbenzene ND 0 50 " <br /> 1,3,5-Tnmethylbenzene ND 050 " <br /> Vmyl chloride ND 050 " <br /> Total Xylenes ND 050 " <br /> Surrogate 1,1-DCA-d4 192 " 250 768 60-140 <br /> Surrogate Dibromofluoromethane 205 250 820 70-130 <br /> Surrogate 1,2-DCA-d4 191 250 768 70-130 <br /> Surrogate Toluene-d8 208 250 832 70-130 <br /> Surrogate 4-BFB 221 250 884 70-130 <br /> nota Analytical-Sacramento The results to 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 25 of 27 <br />