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Sp/ 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)3649233 <br /> equoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> J $19 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Anal�T�y��� 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> �j/ g 1551 tndustnal Road San Carlos CA 94070-411 t (650)232-9600 FAX(650)232-9612 <br /> • <br /> Sequoia Analytical-San Carlos Project N/A Sampled 4/14/99 <br /> 1551 Industrial Blvd Project Number (WO#L904195) Received 4/20199 <br /> San Carlos,CA 94070 Project Manager Mike Gregory Reported 4/30/99 <br /> Volatile Organic Compounds by PPA 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 /> Matrix Spike 9040360-MSI 5904244-03 <br /> Chlorobenzene 4/27/99 200 ND 190 ug/l 600-140 950 <br /> 1,1-Dichloroethane 100 ND 740 600-140 740 <br /> Tnchloroethene 100 ND 9 20 600-140 920 <br /> Surrogate Bromochloromethane 100 800 700-130 800 <br /> Surrogate 2-Chlorotoluene 100 910 700-130 91 0 <br /> Matrix Spike Aun - S904244-03 <br /> Chlorobenzene 4/27/99 200 ND 21 0 ug/I 600-140 105 250 100 <br /> 1,1-Dichloroethane too ND 790 600-140 790 250 654 <br /> Tnchloroethene 100 ND 102 600-140 102 250 103 <br /> Surrogate Bromochloromethane 100 106 700-130 106 <br /> Surrogate 2-Chlorotoluene 100 112 700-130 112 <br /> 0 <br /> Sequoia Analytical-Sacramento *Refer to end of report foi text of notes and definitions <br /> ICi <br /> Sandra R Hanson,Client Services Representative Page 9 of 10 <br />