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Sequoia °Chesapeake Drive Redwood City CA 94063 (650)364-9600 - FAX(650)364-9233 <br /> 4 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 40 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> n 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> l+� <br /> SECOR International Project Chevron 9-6258,Stockton,CA Sampled 416/99 to 417/99 <br /> 9912 Business Park Drive,Ste 100 Project Number 7GO07-018-01 Received 418/99 <br /> Sacramento,CA 95827 Pro ect Manager Roger Hoffmore Reported 4122199 <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 /> i <br /> Batch, 9040243 <br /> Date Prepared, 4120199 Extraction Method, EPA 5030B IMCM <br /> Blank 9040243-BI-KI <br /> Bromodichloromethane 4/20199 ND ug/kg 500 <br /> Bromoform ND 500 <br /> Bromomethane ND 100 <br /> Carbon tetrachloride ND 500 <br /> Chlorobenzene ND Soo <br /> Chloroethane ND 100 <br /> 2-Chloroethylvinyl ether ND 100 <br /> Chloroform ND 500 <br /> Chloromethane ND 100 <br /> Dibromochloromethane ND Soo <br /> 1,3-Dichlorobenzene ND 500 <br /> 1,4-Dichlorobenzene ND 500 <br /> 1,2-Dichlorobenzene ND 500 <br /> W1-Dichloroethane ND 500 <br /> -Dichloroethane ND 500 <br /> i,]-Dichloroethene ND 500 <br /> cis-1,2-Dichloroethene ND 500 <br /> trans-1,2-Dichloroethene ND Soo <br /> 1,2-Dtchloropropane ND 500 <br /> cis-1,3-Dichloropropene ND 500 <br /> trans-1,3-Dichloropropene ND 500 <br /> Methylene chloride ND Soo <br /> 1,1,2,2-Tetrachloroethane ND Soo <br /> Tetrachloroethene ND Soo <br /> 1,1,1-Tnchloroethane ND Soo <br /> 1,1,2-Tnchloroethane ND 500 <br /> Trichloroethene ND Soo <br /> Trichlorofluoromethane ND 500 <br /> Vinyl chloride ND 100 <br /> Surrogate Bromochloromethane 200 192 600-140 960 <br /> Surrogate 2-Chlorotoluene 200 218 600-140 109 <br /> 1,,f's 9040243-BSI <br /> Chlorobenzene 4/20199 400 442 ug/kg 700-130 til <br /> I,1-Dichloroethane 200 214 700-130 107 <br /> Trichloroethene 200 220 700-130 110 <br /> Surrogate Bromochloromethane 200 206 600-140 103 <br /> Surrogate 1-Chlorotoluene 100 214 600-140 107 <br /> r W'oia Analyr.c-I Sacramuitu •Refer to end of repo 1 for'ex1 of aotee and definitions <br /> Sandra R Hanson,Client Services Representative Page l9 of 23 <br />