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680 Chesapeake Drive Redwood City CA 94063 (650)364-96t�0 FAX(650)364-9233 <br /> Sequoia 484 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 /> Analytical 1455 McDowell 81vd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> SECOR International Protect Chevron 9-6258,Stockton,CA Sampled 4/15199 <br /> 9912 Business Park Drive,Ste 100 Project Number 7GO07-018-01 Received 4/16199 <br /> Sacramento,CA 95827 Project Manager Roger Hoffmore Reported 4/30199 <br /> Volatile Organtc 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 /> Blank(cQntinued) 9040330-BLKI <br /> Trichloroethene 4/27/99 ND ug/I 0 500 <br /> Trichlorofluoromethane ND 0 500 <br /> Vinyl chloride ND 100 <br /> Surrogate Bromochloromethane 100 750 700-130 750 <br /> Surrogate 2-Chlorotoluene 100 960 700-130 960 <br /> L..S 9040330-BS1 <br /> Chlorobenzene 4/27/99 200 21 9 ug/l 700-130 109 <br /> 1,1-Dichloroethane 100 800 650-135 800 <br /> Trichloroethene 100 103 700-130 103 <br /> Surrogate Bromochloromethane /00 990 700-130 990 <br /> Surrogate 2-Chlorotoluene too 11 1 700-130 111 <br /> 9040330-MSI 5904244-03 <br /> hlorobenzene 4127/99 200 ND 190 ug/l 600-140 950 <br /> ,1-Dichloroethane 100 ND 740 600-140 740 <br /> Trichloroethene 100 ND 920 600-140 920 <br /> Surrogate Bromochloromethane /00 800 700-130 800 <br /> Surrogate 2-Chlorotoluene too 910 700-130 910 <br /> Matrix Spike Dun 2040330-MSD1 S904244-03 <br /> Chlorobenzene 4/27/99 200 ND 21 0 ug/I 600-140 105 250 100 <br /> 1,[-Dichloroethane 100 ND 790 600-140 79 0 250 6 54 <br /> Trichloroethene 100 ND 102 600-140 102 250 '-03 <br /> Surrogate Bromochloromethane " too 106 700-130 106 <br /> Surrogate 2-Chlorololuene too 112 700-130 112 <br /> equota Analytical Sa,-raincnto *Refer to cnd of report for text of notes and definttwt,s <br /> C <br /> Sandra R Hanson,Client Services Representative ,( Page 12 of 14 <br /> `may <br />