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1 - <br /> Q Sequoia 680 ".peake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget lane Walnut Creek,CA 94598 (9z5)988-9600 FAX(9Z5)988-9673 <br /> Analytical 8t9 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 10/6198 <br /> 1 1315 Sunrise Gold Circle St M Project Number 910-017 IA Received 1017/98 <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 % Linut % Notes* <br />' Matrix=Spike 81,00176-MSI 5810080-01 <br /> Chlorobenzene 10/14/98 400 ND 360 ug/kg 600-140 900 <br /> 1,I-Dichlaroethane 11 <br /> 200 ND 208 IP600-140 104 <br /> Trichloroethene 11 200 ND 174 11600-140 87 0 <br /> Surrogate Bromochloromethane 200 210 or 600-140 105 <br /> Surrogate 2-Chlorotoluene 200 168 600-140 84 0 <br /> Matrix Spike Dun 8100176-MSD1 5810080-01 , <br /> Chlorobcnzene 10/14/98 400 ND 432 ug/kg 600-140 108 250 182 <br /> 1,1-Dichloroethane 1. 200 ND 248 11 600-140 124 250 175 <br /> Trichloroethene 200 ND 202 11 600-140 101 25 0 14 9 <br /> Surrogate Bromochloromethane 11 200 256 01 600-140 128 <br /> Surrogate 2-Chlorotoluene " 200 192 " 600-140 960 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> Sequoia Analytical -Sacramento *Refer to end ofreport for text ofnotes and definitions <br /> L da C Schneider, aboratoryDirector Page IS of 16 <br />