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680 =hesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)3649233 <br /> Sequoia 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921.0100 <br /> N-0 Analytical 1455 McDowell Blvd. North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> 0 <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 4113199 <br /> 9912 Business Park Drive,Ste. 100 Project Number: NIA Received: 4114199 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 4119199 <br /> Volatile Organic Compounds by EPA Method 8240BIQuality 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: 9040173 Date Proaad. -4115192 Extraction Method: EPA 50308 [1VMeOHI <br /> Blanit 9040173-13LK1 <br /> Acetone 4115199 ND ug/kg 500 <br /> Benzene ND 100 <br /> Bromodichloromethane ND 100 <br /> Bromoform ND 100 <br /> Bromomethane ND 100 <br /> 2-Butanone ND 500 <br /> Carbon disulfide ND 100 <br /> Carbon tetrachloride ND 100 <br /> Chlorobenzene ND 100 <br /> Chloroethane ND 100 <br /> 2-Chloroethylvinyl ether ND 500 <br /> Chloroform ND 100 <br /> loromethane ND " 100 <br /> romochloromethane ND 100 <br /> 1,1-Dichloroethane ND 100 <br /> 1,2-Dichloroethane ND 100 <br /> I,1-Dichloroethene ND 100 <br /> cis-1,2-Dichloroethene ND 100 <br /> trans-1,2-Dichloroethene ND 100 <br /> 1,2-Dichloropropane ND 100 <br /> cis-1,3-Dichloropropene ND 100 <br /> trans-1,3-Dichloropropene ND 100 <br /> Ethylbenzenc ND 100 <br /> 2-Hexanone ND 500 <br /> Methylene chloride ND 250 <br /> 4-Methyl-2-pentanone ND 500 <br /> Styrene ND 100 <br /> 1,1,2,2-Tetrachloroethane ND 100 <br /> Tetrachloroethene ND 100 <br /> Toluene ND 100 <br /> 1,1,1-Trichloroethane ND 100 <br /> 1,1,2-Trichloroethane ND 100 <br /> Trichloroethene ND 100 <br /> Trichlorofluoromethane ND 100 <br /> Vinyl acetate ND 250 <br /> Vinyl chloride ND 100 <br /> Total Xylenes ND 100 <br /> Surrogate: Dibromofluoromelhane 2S00 2300 70.0-130 92.0 <br /> Surrogate: 1,2-DCA-d4 2500 2470 70.0-130 98.8 <br /> rrogale: Toluene-d8 2500 2580 70.0-130 103 <br /> —'Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> R r � <br /> Sandra R.Hanson,Client Services Representative Page 9 of 12 <br />