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Sequoia 600 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> a- -N Analytical 819 Striker Avenue.Suite 8 Sacramento.CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd. North,Ste.D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> SHCOR International Project: ARCO 4493, Stockton,CA Sampled: 2116199 <br /> 9912 Business Park Drive,Ste. 100 Project Number: NIA Received: 2/17199 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 313/99 <br /> Volatile Organic Compounds by EPA Method 8260A/Quality 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: 9020207 F,Xtraction Method: EPA 503013_IPgI <br /> Blank 9020207-BLKI <br /> Benzene 2118/99 ND ug/1 2.00 <br /> Bromobenzene ND 2.00 <br /> Bromochloromethane ND 2.00 <br /> Bromodichloromethane ND 2.00 <br /> Bromoform ND 2.00 <br /> Bromomethane ND 5.00 <br /> n-Butylbenzene ND 2.00 <br /> sec-Butylbenzene ND 2.00 <br /> tert-Butylbenzene ND 2.00 <br /> Carbon tetrachloride ND 2.00 <br /> Chlorobenzene ND 2.00 <br /> Chloroethane ND 5.00 <br /> 0Ioroform ND 2.00 <br /> romethane ND 5.00 <br /> -Chlorotoluene ND 2.00 <br /> 4-Chlorotoluene ND 2.00 <br /> Dibromochloromethane ND 2.00 <br /> 1,2-Dibromoethane ND 2.00 <br /> Dibromomethane ND 2.00 <br /> 1,2-Dibromo-3-chloropropane ND 5.00 <br /> 1,2-Dichlorobenzene ND 2.00 <br /> 1,3-Dichlorobenzene ND 2.00 <br /> 1,4-Dichlorobenzene ND 2.00 <br /> Dichlorodifluoromethane ND 5.00 <br /> 1,1-Dichloroethane ND 2.00 <br /> 1,2-Dichloroethane ND 2.00 <br /> 1,1-Dichloroethene ND 2.00 <br /> cis-1,2-Dichloroethene ND 2.00 <br /> trans-l,2-Dichloroethene ND 2.00 <br /> 1,2-Dichloropropane ND 2.00 <br /> 1,3-Dichloropropane ND 2.00 <br /> 2,2-Dichloropropane ND 2.00 <br /> 1,1-Dichloropropene ND 2.00 <br /> Bthylbenzene ND 2.00 <br /> Hexachlorobutadiene ND 2.00 <br /> Isopropylbenzene ND 2.00 <br /> p-tsopropyltoluene ND 2.00 <br /> Methylene chloride ND 5.00 <br /> Naphthalene ND 5.00 <br /> - ropy[benzene ND 2.00 <br /> quoia Analytical-Sacramento *Refer to end of report far text of notes and definitions. <br /> Sandra R. Hanson,Client Services Representative Page 13 of 20 <br />