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Sequoia 680 Chesapeake Drive Redwood City CA 94U63 (650)364-9600 FAX(650) 364-9233 — <br /> AOA N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Sinker Avenue Suite 8 Sacramento CA 95834 1916)921 9600 FAX{916)921-0100 <br /> Analytical 551 InduMcDsriallRo d North Ste D San Petaluma <br /> CA 94070 41 1 1 (650) 232-9600 FAX(650)232 96865 FAX(707) 12 <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 3/18/99 <br /> 9912 Business Park Drive,Ste 100 Project Number 7G600-019-04 Received 3118199 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3/23199 <br /> Volatile Organic Compounds by EPA Method 801013IQuality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch. 9030283 Date Prepared. 3/22/99 Extraction Method, EPA_5.03013 IMeQUI <br /> Blank 203Q2$3_B LK 1 <br /> Bromodichloromethane 3/22/99 ND ug/kg 500 <br /> Bromoform ND 500 <br /> Bromomethane ND 100 <br /> Carbon tetrachloride ND 500 <br /> Chlorobenzene ND 500 <br /> Chloroethane ND 100 <br /> 2-Chloroethylvinyl ether ND 100 <br /> Chloroform ND 500 <br /> Chloromethane ND " 100 <br /> Dibromochloromethane ND 500 <br /> 1,3-Dichlorobenzene ND 500 <br /> 1,4-Dichlorobenzene ND 500 <br /> Dichlorobenzene ND 500 <br /> tchloroethane ND 500 <br /> 1,2-Dichloroethane ND 500 <br /> 1,1-Dichloroethene ND 500 <br /> cis-1,2-Dichloroethene ND 500 <br /> trans-1,2-Dichloroethene ND Soo <br /> 1,2-Dichloropropane ND 500 <br /> cis-1,3-Dichloropropene ND 500 <br /> trans-1,3-Dichloropropene ND 500 <br /> Methylene chloride ND 500 <br /> 1,1,2,2-Tetrachloroethane ND 500 <br /> Tetrachloroethene ND 500 <br /> 1,1,1-Trichloroethane ND Soo <br /> 1,1,2-Trichloroethane ND 500 <br /> Trichloroethene ND 500 <br /> Trichlorofluoromethane ND 500 <br /> Vinyl chloride ND 100 <br /> Surrogate Brornochloromethane 200 158 600-140 790 <br /> Surrogate 2-Chlorololuene 200 188 600-140 940 <br /> 1&S 9030283-13S I <br /> Chlorobenzene 3122/99 400 466 ug/kg 700-130 117 <br /> 1,1-Dichloroethane 200 224 700-130 112 <br /> Trichloroethene 200 224 700-130 112 <br /> Surrogate Bromochloromethane 200 268 600-140 134 <br /> Surrogate 2-Chlorotoliiene 200 232 600-140 116 <br /> equoia Analytical -Sacramento *Refer to end of report for text of notes and definitions <br /> Sandra R Hanson,Client Services Representative Page 7 of 9 <br />