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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 /> 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 /> ' Pacific Environmental Group-Sac Project Unocal 0123,Tracy,CA Sampled 10/22/98 <br /> 11315 Sunrise Gold Circle St M Project Number 910-017 1 Received 10/22/98 <br /> ' Rancho Cordova,CA 95742 Project Manager Mike Mitchener Reported 10/30/98 <br /> Volatile Organic Compounds by EPA Method 80108/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 8104315-MSI SNIOI80-02 <br /> Chlorobenzene 10/27/98 200 ND 202 ug/1 600-140 101 <br /> ],I-Dichloroethane 100 ND 11 5 600-140 115 <br /> ' Trichloroethene 100 ND 10 6 600-140 106 <br /> Surrogate Bromochloromethane 100 109 700-130 109 <br /> Surrogate 2-Chlorotoluene 100 990 700-130 990 <br /> Matrix Spike Duo 8100315-MSD1 5810180-02 <br /> Chlorobenzene 10/27/98 20 0 ND 194 ug/1 600-140 970 250 404 <br /> 1,1-Dichloroethane 10 0 ND 11 1 600-140 111 250 3 54 <br /> Trichloroethene 10 0 ND 102 600-140 102 25 0 3 85 <br /> ' Surrogale Bromochloromethane 100 103 700-130 103 <br /> Surrogate 2-Chlarotoluene 100 860 700-130 860 <br /> 1 <br /> equoia alytical-Sacramento *Refer to end of report for text of notes and definitions <br /> G� �7 <br /> mda C Schneider, aboratory Director Page 11 of 12 <br />