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• Sequoia 680 Chesapeake Drive Mdwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)92E-9600 FAX(916)421-0104 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> • <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 12/17/98 <br /> 9912 Business Park Drive,Ste 100 Project Number 76600-603-04 Received 12/18/98 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 116199 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/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. 8120274 Date Prepared. 121212$ ExtradggiNlethod. EPA 030B(PIT) <br /> Blank 8120274-BLKI <br /> Purgeable Hydrocarbons 12/21/98 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND Sao <br /> Surrogate a a a-Trtfluorotoluene 10 0 886 600-140 88 6 <br /> LCs 8120274-BSI <br /> Benzene 12/21/98 10 0 106 ug/l 700-130 106 <br /> Toluene 100 992 700-130 992 <br /> Ethylbenzene 10 0 987 700-130 987 <br /> ylenes(total) 30 0 297 700-130 99 0 <br /> ethyl tent-butyl ether 100 1 t 7 700-130 117 <br /> Surrogate a a a-Triuorotoluene 10 0 8 95 600-140 895 <br /> Matrix Lkc 8120274-MSI 5812270-02 <br /> Benzene 12/21/98 10 0 ND 107 ug/l 600-140 107 <br /> Toluene 10 0 ND 997 600-140 997 <br /> Ethylbenzene 10 0 ND 9 80 600-140 980 <br /> Xylenes(total) 300 ND 295 600-140 98 3 <br /> Methyl tert-butyl ether 10 0 ND 13 0 600-140 130 <br /> Surrogate a a a-Trifluorotoluene 100 101 600-140 101 <br /> SDI S812270-02 <br /> Benzene 12/21/98 10 0 ND 106 ug/1 600-140 106 25 0 0 939 <br /> Toluene t0 0 ND 994 600-140 994 250 0 301 <br /> Ethylbenzene 10 0 ND 973 600-140 973 25 0 0 717 <br /> Xylenes(total) 30 0 ND 294 600-140 980 250 0 306 <br /> Methyl tert-butyl ether 100 ND 14 0 600-140 140 25 0 7 41 <br /> Surrogate a a a-Trifluorololuene 10 0 9 94 600-140 994 <br /> Batch. 8120295 Date Prepared. MUM M EXtrartion Method. EPA 503013(P/T) <br /> Blank 8120295-BLKI I <br /> Purgeable Hydrocarbons 12/22/98 ND ugli Soo <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND Soo <br /> Sequoia Analytical-Sacramento *Refer to end of?eport for text of notes and definitions <br /> ZCIV;77 SIV Z-- <br /> Linda C Schneider, Laboratory Director <br /> i Page 5 of 9 <br />