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1 <br /> Sequoia 68o Chesapeake Drive Redwood Cary CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget lane Walnut Creek,CA 94598 (9Z 5)988-9600 FAX(925)988-9673 <br /> Analytical 819 Sinker 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 10/6/98 <br /> 11315 Sunrise Gold Circle St M Project]dumber 910-017 1 Received 10/7/98 <br />' Rancho Cordova,CA 95742 Project Manager Mike Mitchener Reported 10/16/98 <br /> Volatile Organic Compounds by EPA Method 8010E/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 /> Batch, 81QO195 Date Prepared, 10[,1412$ Extraction Methg.,P,A 5030B IP/T1 <br /> Blah $LQ0195-BLK1 <br /> Bromodichloromethane 10/14/98 ND ug/l 0 500 <br /> Bromoform ND 0 500 <br /> Bromomethane ND 100 <br /> Carbon tetrachloride ND 0 500 <br /> Chlorobenzcne ND 0 500 <br /> Chloroethane ND 100 <br /> 2-Chloroethylvinyl ether ND 1 00 <br /> Chloroform ND 0 500 <br />' Chloromethane ND 100 <br /> Dibromochloromethane " ND i' 0 500 <br /> 1,3-Dichlorobenzene ND 0 500 <br /> 1,4-Dichlorobenzene ND 0 500 <br /> 102-Dlchloroben7ene ND 0 500 <br /> ,I-Dichloroethane ND 0 500 <br /> 1,2-Dichloroethane ND 0 500 <br /> 1,1-Dichloroethene ND 0 500 <br />' cis-1,2-Dichloraethene ND 0 500 <br /> trans-1,2-Dichloraethene ND 0 500 <br /> 1,2-Dichloropropane ND 0 500 <br /> cis-1,3-Dichloropropene ND 0 500 <br /> trans-1,3-Dichloropropene ND 0 500 <br /> Methylene chloride ND 500 <br /> 1,1,1,2-Tetrachloroethane ND 0500 <br /> Tetrachloroethene ND 0 500 <br /> 1,1,1-Trichloroethane ND 0 500 <br /> 1,1,2-Trichloroethane ND 0500 <br />' Trichloroethene ND 0 500 <br /> Trichlorofluoromethane ND 0 500 <br /> Vinyl chloride ND 1 00 <br /> Surrogate Bromochloromethane 100 100 700-130 100 <br />' Surrogate 2-Chlorotoluene 100 800 700-130 800 <br /> LJCS 8100195-BS1 <br /> Chlorobenzene 10/14/98 25 1 ug/1 700-130 <br /> 1,1-Dichloroethane 790 650-135 <br /> Trichloroethene 790 700-130 <br /> Surrogate Bromochloromethane 100 850 700-130 850 <br /> Surrogate 2-Chlorotoluene 100 830 700-130 830 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text ofnotes and definitions <br /> L da C Schneider,Eaboratory Director Page 10 of 13 <br /> R4, <br />