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• 680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650)364-9233 <br /> Sequoia a 404 N Woget 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 1 S$1 IndDowallRool d ]North Ste D SanaCarlos CA 94070-4111 (650)232 ma CA 94954 (707)79Z 9600 FAX(650)232-9612 <br /> SECOR international Project ARCO 2133,Stockton,CA Sampled 3/18/99 <br /> 9912 Business Park Drive, Ste 100 Project Number 7G600-019-04 Received 3118/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3/23/99 <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 % Notes* <br /> Batch, 9030265 Date Prepared, 3119/99 Extraction Method. FPA 5030E(MeOH) <br /> Blank 9030265-BLK1 <br /> Purgeable Hydrocarbons 3/19/99 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 a a-Trifuorotoluene 0200 0 197 600-140 98 5 <br /> LCS 9030265-1351 <br /> Benzene 3/19/99 0200 0201 mg/kg 700-130 101 <br /> Toluene 0200 0 212 700-130 106 <br /> Ethylbenzene 0200 0 211 700-130 105 <br /> 0 nes(total) 0 600 0 581 700-130 968 <br /> yl tert-butyl ether 0200 0 185 700-130 925 <br /> Surrogate a a a-Trtf uorotoluene 0200 0 210 600-140 105 <br /> Matrix Spike 9030265-MSI S903222-05 <br /> Benzene 3/19/99 0200 ND 0 185 mg/kg 600-140 925 <br /> Toluene 0200 ND 0 199 600-140 995 <br /> Ethylbenzene 0200 ND 0 197 600-140 98 5 <br /> Xylenes(total) 0 600 ND 0 547 600-140 91 2 <br /> Methyl tert-butyl ether 0200 ND 0 159 600-140 795 <br /> Surrogate a a a-Trtf uorotoluene 0200 0 193 600-140 965 <br /> Matrix Spike Duu 9039265-MSDI 5903222-05 <br /> Benzene 3/19/99 0200 ND 0 187 mg/kg 600-140 935 250 1 08 <br /> Toluene 0200 ND 0200 600-140 100 250 0 501 <br /> Ethylbenzene 0200 ND 0200 600-140 100 250 1 51 <br /> Xylenes(total) 0 600 ND 0 554 600-140 923 25 0 1 20 <br /> Methyl ter -butyl ether 0200 ND 0 171 600-140 85 5 25 0 727 <br /> Surrogate a a a-Trtfuorotoluene 0200 0200 600-140 100 <br /> Sequoia Analytical - Sacramento *Refer to end of report for text of notes and definitions <br /> C <br /> Sandra R Hanson,Client Services Representative Page 5 of 9 <br />