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' 680 Chesapeake Drive Redwood CI CA 94063 650 364-9600 FAX(650)364-9233 <br /> Sequoia { ) <br /> 404 N Wiget Lane Walnut Creek CA 94598 (92S)988-9600 FAX(925)988-9673 <br /> o�o 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)79Z-186S FAX(707)792-0342 <br /> ' Pacific Environmental Group-Sac Project Unocal 0123,Tracy,CA Sampled 10/22/98 <br /> 113 11 Sunrise Gold Circle St M Project Number 110-0171A Received 10/22/98 <br /> ' Rancho Cordova,CA 95742 Protect Mana er Mike Mitchener Reported 10/30/98 <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 IN Limit % Notes* <br /> Batch. 8100315 Extraction Mrth.od, EPA 50-30B (P/Tl <br /> Blank 8100315-BLKt <br /> Bromodichloromethane 10/27/98 ND ug/1 0 500 <br />' Bromoform ND 0 500 <br /> Bromomethane ND 1 00 <br /> Carbon tetrachloride ND 0 500 <br /> Chlorobenzene ND 0 500 <br />' Chloroethane " ND 1 00 <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 /> WI-Dichlorobenzene ND 0 500 <br /> -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 0 500 <br />' cis-1,3-Dichloropropene ND 0 500 <br /> trans-1,3-Dichloropropene ND 0500 <br /> Methylene chloride ND 500 <br /> 1,1,1,2-Tetrachloroethane ND 0 500 <br /> Tetrachloroethene ND 0 500 <br /> I,1,1-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 8 70 700-130 870 <br /> Surrogate 2-Chlorotoluene 100 710 700-130 71 0 <br /> LC'S 8100315-BSI <br /> Chlorobenzene 10/27/98 200 182 ug/l 700-130 91 0 <br />' 1,1-Dichloroethane 100 107 650-135 107 <br /> Trichloroethene 100 100 700-130 100 <br /> Surrogate Bromochloromethane 100 910 700-130 910 <br /> Surrogate 2-Chlorotoluene 10 0 8 70 700-130 870 <br /> Sequoia alytical-Sacramento *Refer to end of report for text of notes and definitions <br /> 1A1' V'1111' <br /> — I ."IX., . 1117 <br /> nda C Schnee er, Laboratory Duecto Page 10 of 12 <br />