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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)3646233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Stoker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)92t_0100 <br /> 14W Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-41 11 (650) 232-9600 FAX(650)232-9612 <br /> 01 <br /> Sequoia Analytical-San Carlos Project N/A Sampled 4/14/99 <br /> 1551 1ndustnal Blvd Project Number (WO#L904195) Received 4/20/99 <br /> San Carlos,CA 94070 Project Manager Mike Gregory _ Reported 4130/99 <br /> Volatile Organic Compounds by EPA Method-8010B/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 /> Hatch. 9040360 Extraction Method, EPA 5030B [PP/T1 <br /> 111au k <br /> Bromodichloromethane 4/2.8/99 ND ug/1 0 500 <br /> Bromofonn ND 0 500 <br /> Bromomethane ND 100 <br /> Carbon tetrachloride ND 0 500 <br /> Chlorobenzene ND 0 500 <br /> Chloroethane ND 100 <br /> 2-Chloroethylvinyl ether ND 1 00 <br /> Chloroform ND 0 500 <br /> Chloromethane ND 100 <br /> Dibromochloromethane ND 0 500 <br /> 1,3-Dichlorobenzene ND 0 500 <br /> 1,4-Dichlorobenzene ND 0 500 <br /> 1,2-Dichlorobenzene ND 0 500 <br /> 1,1-Dichloroethane ND 0 500 <br /> 1,2-Dichloroethane ND 0 500 <br /> 1,1-Dichloroethene ND 0 500 <br /> cis-1,2-Dichloroethene ND 0 500 <br /> trans-1,2-Dichloroethene ND 0 500 <br /> 1 2_Dichloropropane ND —0500 <br /> cis-1,3-Dichloropropene ND 0 500 <br /> trans-1,3-Dichloropropene ND 0 500 <br /> Methylene chloride ND 500 <br /> 1,1,1,2-Tetrachloroethane ND 0 500 <br /> Tetrachloroethene ND 0 500 <br /> l-1l-1=Tnchloroethane " ND "— 0 500 <br /> 1,1,2-Tnchloroethane ND 0 500 <br /> Trichloroethene ND 0 500 <br /> Trichlorofluoromethane ND 0 500 <br /> Vinyl chloride ND 1 00 <br /> Surrogate Bromochloromethane " 100 830 11700-130 830 <br /> Surrogate 2-Chlorotoluene 11100 114 700-130 114 <br /> LC'S 9040360-B31 <br /> Chlorobenzene 4/28/99 200 245 ug/l 700-130 123 <br /> 1,1-Dichloroethane 100 960 65 0-135 960 <br /> Tnchloroethene 100 116 700-130 116 <br /> Surrogate Bromochloromethane 100 11 6 700-130 116 <br /> Surrogate 2-Chlorotoluene 100 13 9 700-130 139 3 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and defineta <br /> 3c"-7 Cr/(2 z <br /> Sandra R Hanson,Client Services Representative Page 8 of 10 <br />