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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite B Sacramento CA 9%34 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ,551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> con-Cameron Park Project ARCO 6020 Manteca,Ca Sampled 5/17/99 <br /> 3939 Cambridge Road,Ste 202 Project Number NIA Received 5/17/99 <br /> meron Park,CA 95682 Project Manager Joel Coffman Reported 5118199 <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 /> Date Prep;rc(l. 11105? Fxtraction Method. EPA 50308 ILâ–º'1rt21i1 <br /> 9050203-BLKI <br /> Bromodichloromethane 5/18/99 ND ug/kg 500 <br /> omoform ND 500 <br /> omomethane ND 100 <br /> Carbon tetrachloride ND 500 <br /> lorobenzene ND 500 <br /> loroethane ND too <br /> Chloroethylvinyl ether ND 10 0 <br /> Chloroform ND 500 <br /> gloromethane ND 100 <br /> bromochloromethane ND 500 <br /> 1,3-Dichlorobenzene ND 500 <br />*ichloroethane <br /> ichlorobenzene ND 500 <br /> ichlorobenzene ND 500 <br /> ND 500 <br /> 1,2-Dichloroethane ND 500 <br /> 1" Dichloroethene ND 500 <br /> :1,2-Dichloroethene ND 500 <br /> ans-1,2-Dichloroethene ND 500 <br /> 1 2-Dichloropropane ND 500 <br /> s-1,3-Dichloropropene ND 500 <br /> s-1,3-Dichloropropene ND 500 <br /> Methylene chloride ND 500 <br /> t", <br /> ,2,2-Tetrachloroethane ND 500 <br /> trachloroethene ND Soo <br /> l-Trichloroethane ND 500 <br /> 1,1,2-Trichloroethane ND 500 <br /> trichloroethene ND 500 <br /> richlorofluoromethane ND " 500 <br /> Vinyl chloride ND 100 <br /> rogate Bromochloromethane 200 198 600-140 990 <br /> frrogate <br /> 2-Chlorotoluene 200 160 600-140 800 <br /> U5 2050203-BS1 <br /> Jhlorobenzene 5/18/99 400 364 ug/kg 700-130 91 0 <br /> 1-Dichloroethane 200 162 700-130 810 <br /> nchloroethene 200 176 700-130 880 <br /> Surrogate Bromochloromethane 200 188 600-140 940 <br /> Lrrogatee 2-Chlorotoluene 100 198 600-140 990 <br /> equola Analytical-Sacramento *Refer to end of report jor text ojnotes and defrnulons <br /> Donald W Bobel,Client Services Representative Page 7 of 9 <br />