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tl y <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wi8et Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)9Z -9600 FAX(916)921-010 0 <br /> Iwo- Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 0 <br /> SECOR International Project ARCO 2093,Tracy,CA Sampled 12/15/98 <br /> 9912 Business Park Drive Ste 100 Project Number 7G600-603-04 Received 12/16/98 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 12/30/98 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical -Sacramento <br /> Date Spike Sample QC Reporting Limn Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes• <br /> Batch, 8120246 Date Prepared, 1117198 ExtractiQ LMeth2d EPA 5030$(f!LT) <br /> Blah. 8120246-BLKI <br /> Purgeable Hydrocarbons 12/17/98 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 500 <br /> Surrogate a a a-Trrfluorotoluene 100 105 600 140 105 <br /> IICS 8120246-BSI <br /> Benzene 12/17/98 100 11 1 ug/l 700-130 1 1 1 <br /> Toluene 100 103 700-130 103 <br /> 1<thylbenzene 100 102 700-130 102 <br /> enes(total) 300 304 700-130 101 <br /> hyl tert-butyl ether too 11 1 700-130 Ill <br /> Surrogate a a a-Trrfluorotoluene 100 105 600 140 105 <br /> MatrixP_-rSnike 8120246-MSI 5812222-03 <br /> Benzene 12/17/98 100 ND 109 ug/1 600-1-40 109 <br /> Toluene 100 ND 104 600-140 104 <br /> Ethylbenzene 100 ND 102 600-140 102 <br /> Xylenes(total) 300 ND 304 600-140 101 <br /> Methyl cert-butyl ether l 0 0 ND 106 600-140 106 <br /> Surrogate a a a-Trrfluorotoluene 100 9 85 600-140 98 5 <br /> Matrix Spike Buo 8120246-MSDI 5812222-03 <br /> Benzene 12/17/98 100 ND 11 1 ug/1 600-140 1 1 1 25 0 1 82 <br /> Toluene too ND 104 600-140 104 25 0 0 <br /> Ethylbenzene 100 ND 10 1 600-140 101 25 0 0 985 <br /> Xylenes(total) 300 ND 305 600 140 102 25 0 0 985 <br /> Methyl tert-butyl ether 100 ND 142 600-140 142 25 0 290 2,3 <br /> Surrogate a a a-Ti ifluorotoluene 100 101 600 140 101 <br /> Sequoia Analytical Sacramento 'Refer to end of report jar text of notes and definitions <br /> S �� -CAI <br /> Linda C Schneider Laboratory Director Page 4 of 5 <br /> r� <br />