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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> ` Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 - <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 Analytical 1551 IndustrialcMcDowell North Ste D Petaluma arls CA 94070 41 1 l (650)232-CA 94954 (707)79Z 9865 FAX(707)792-0342 <br /> 600 FAX(650)232-9612 <br /> SECOR International Project Chevron 9-6258,Stockton,CA Sampled 4/15/99 <br /> 9912 Business Park Drive,Ste 100 Project Number 7GO07-018-01 Received 4/16199 <br /> Sacramento,CA 95827 Pro ect Manager Roger Hoffmore Reported 4130/99 <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 % Nates* <br /> Matrix Spike 4040327-MSI S9Q4234-9] <br /> Chlorobenzene 4123/99 200 ND 23 1 ug/1 600-140 116 <br /> 1,1-Dtchloroethane 100 0 977 107 600-140 972 <br /> Trichloroethene 100 ND 1 1 7 600-140 117 <br /> Surrogate Bromochloromethane 100 113 700-130 113 <br /> Surrogate 2-Chlorotoluene 100 120 700-130 120 <br /> Matrix Sp11SPDun 9040327-MSDI 5204234--Q] <br /> Chlorobenzene 4/23/99 200 ND 219 ug/1 600-140 109 250 6 22 <br /> 1,1-Dtchloroethane 100 0 977 960 600-140 862 250 120 <br /> Trichloroethene 100 ND 108 600-140 108 250 800 <br /> Surrogate Bromochloromethane 100 110 700-130 110 <br /> Surrogate 2-Chlorotoluene 100 11 6 700-130 116 <br /> Batch. 9040330 Date Prepared. 4/27/99 Extraction ethGd. EJ!A 5030B IP/TI <br /> QLW 9040330-BLKI <br /> romodichloromethane 4/27/99 ND ug/l 0 500 <br /> Bromoform ND 0 500 <br /> Bromomethane ND 100 <br /> Carbon tetrachloride ND 0 500 <br /> Chlorobenzene ND 0 500 <br /> Chloroethane ND 100 <br /> 2-Ch lo roethy I vinyl 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 /> 1,2-Dichlorobenzene ND 0 500 <br /> 1,1-Dichloroethane ND 0500 <br /> 1,2-Dichloroethane ND 0 500 <br /> 1,1-Dichloroethene ND 0 500 <br /> cis-1,2-Dichloroethene ND 0 500 <br /> trans-l,2-Dichloroethene ND 0 500 <br /> 1,2-Dichloropropane ND 0 500 <br /> cis-1,3-Dichloropropene ND 0 500 <br /> trans-t,3-Dichloropropene ND 0 500 <br /> Methylene chloride ND 500 <br /> l,1,1,2-Tetrachloroethane N D 0 500 <br /> Tetrachlorocthene ND 0 500 <br /> 1,1,1-Trichloroethane N D 0 500 <br /> 1,1,2-Trichloroethane ND 0500 <br /> .ots Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Sandra R Hanson,Client Services Representative Page 1 I of 14 <br />