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Sequoia 680 Chesapeake Drive Redwood 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)921-9600 FAX{916}921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)79Z-1865 FAX(707)792-0342 <br /> SECOR International Project TOSCO 8671,Stockton,CA Sampled 1/27/99 to 1/28/99 <br /> 9912 Business Park Drive,Ste 100 Project Number 7G888-010-03 Received 1129199 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 2/12/99 <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 % Nates* <br /> Blank(contrriued) 9920031-BLK1 <br /> Surrogate a a a-Trrfluorotoluene 212199 0200 0204 mg/kg 600-140 102 <br /> LAS 9020031-BS1 <br /> Benzene 2/2/99 0200 0205 mg/kg 700-130 102 <br /> Toluene 0200 0207 700-130 103 <br /> Ethylbenzene 0200 0207 700-130 103 <br /> Xylenes(total) 0 600 0 617 700-130 103 <br /> Methyl tert-butyl ether 0200 0204 700-130 102 <br /> Surrogate a a,a-Triuorotoluene 0200 0207 600-140 103 <br /> Matrix Spike 9020031-MSI 5901265-155 <br /> Benzene 212199 0200 ND 0 175 mg/kg 600-140 87 5 <br /> Toluene 0200 ND 0 179 600-140 89 5 <br /> Ethylbenzene 0200 ND 0 181 600-140 905 <br /> Oylenes(total) " 0 600 ND 0 545 600-140 908 <br /> ethyl tert-butyl ether 0200 ND 0 198 600-140 99 0 <br /> Surrogate a a a-Trifluorotoluene 0200 0103 600-140 101 <br /> Matrix Spike Dup 2020031-MSD- 5901265-15 <br /> Benzene 212/99 0200 ND 0 179 mg/kg 600-140 89 5 250 226 <br /> Toluene 0200 ND 0 176 600-140 880 250 1 69 <br /> Ethylbenzene 0200 ND 0 184 600-140 92 0 25 0 1 64 <br /> Xylenes(total) 0 600 ND 0 552 600-140 92 0 25 0 131 <br /> Methyl tert-butyl ether 0200 ND 0207 600-140 103 250 396 <br /> Surrogate a a a-Trifluorotoluene 0100 0 195 600-140 975 <br /> Batch. 9020042 Date Prepared, 213199 Extractign Method. EEA5030B(Me <br /> Blank 9020042-BLK1 <br /> Purgeable Hydrocarbons 2/3/99 ND mg/kg 1 00 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Methyl tert-butyl ether ND 00500 <br /> Surrogate a s a-Trrfluorotoluene 0200 0200 600-140 100 <br /> LICS 9020042-13S1 <br /> Benzene 2/3199 0200 0 210 mg/kg 700-130 105 <br /> Toluene 0200 0 216 700-130 108 <br /> Ethylbenzene 0200 0 214 700-130 107 <br /> Xylenes(total) 0 600 0 636 700-130 106 <br /> equoia Analytical -Sacramento *Refer to end of report for text of nates and definitions <br /> �6' <�G' <br /> Sandra R Hanson,Client Services Representative Page 7 of 1 l <br />