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Sequoia 680 Li..sapeake 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 /> Analytical 819 Sinker Avenue Swte 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 10/6/98 <br /> 11315 Sunrise Gold Circle St M Project Number 910-017 IA Received 10/7/98 <br />' Rancho Cordova,CA 95742 Project Manager Mike Mitchener Reported 10/20/98 <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 />' Matrix Spike ;100176-MS1 5810080-01 <br /> Chlorobenzene 10/14/98 400 ND 360 ug/kg 600-140 900 <br /> ,l-Dichloroethane 200 ND 208 600-140 104 <br />' Trichloroethene 200 ND 174 600-140 870 <br /> Surrogate Bromochloromethane 200 210 600-140 105 <br /> Surrogate 2-Chlorotoluene " 200 168 600-140 840 <br /> Matrix Spike Duo 8100176-MSD1 5810080-01 <br /> Chlorobenzene 10/14/98 -400 ND 432 ug/kg 600-140 108 250 182 <br /> 1,1-Dichloroethane 200 ND 248 600-140 124 25 0 175 <br />' Trichloroethene 200 ND 202 600-140 101 250 149 <br /> Surrogate Bromochloromethane 200 256 600-140 128 <br /> Surrogate 2-Chlorotoluene 200 192 600-140 960 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of nates and definitions <br /> inda C Schne der,Laboratory Director Page I I of 13 <br /> .47� <br />