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Striker Avenue Suite 8 <br /> Sequoia 819 Sacramento CA 95534 <br /> (916) 921-9600 <br /> Analytical <br /> nalytical FAX(916) 921-0100 <br /> Blame Tech Services Inc Project Chevron 9-6171, Stockton, CA Sampled 2/16/00 <br /> 1680 Rogers Avenue Project Number 000216-14 Received 2/17/00 <br /> San Jose CA 95112-1105 Project Manager Scott Boor Reported 2129/00 <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 0020227 Date Prepared 2/231_00 Extraction Method EPA 5030E McOH <br /> Blank 0020227-BLKI <br /> Purgeable Hydrocarbons 2/23/00 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 /> Methvl tert-butyl ether ND 250 <br /> Surrogate a a a-Trifluorotoluene 100 106 600-140 106 <br /> LCS 0020227-RSI <br /> Benzene 2/23/00 100 987 ug/l 700-130 987 <br /> Toluene " 100 994 700-130 994 <br /> Ethylbenzene 100 103 700-130 103 <br /> Xylenes(total) 300 308 700-130 103 <br /> Wethyl tent-butyl ether _ 100 104 700-130 104 <br /> 11ogate a a a-Trifluorotoluene 100 112 600-140 112 <br /> Matrix Spike 0020227-MSI S002250-01 <br /> Benzene 2/23/00 100 ND 981 ug/l 600-140 981 <br /> Toluene 100 ND 9 81 600-140 981 <br /> Ethylbenzene 100 ND 101 600-140 101 <br /> Xylenes(total) 300 ND 302 600-140 101 <br /> Methyl tert-butyl ether 100 ND 113 600-140 113 <br /> Surrogate a a,a-Tr:fluorotoluene 100 105 600-140 105 <br /> Matrix Spike Dup 0020227-MSD1 5002250-01 <br /> Benzene 2/23/00 100 ND 10 0 ug/l 600-140 100 250 192 <br /> Toluene 100 ND 100 600-140 100 250 192 <br /> Ethylbenzene 100 ND 104 600-140 104 250 293 <br /> Xylenes(total) 300 ND 31 1 600-140 104 250 293 <br /> Methyl tert-butyl ether 100 ND 11 5 600-140 115 250 175 <br /> Surrogate a a,a-Triuorotoluene 100 106 600-140 106 <br /> Batch 0020239 Date Prepared 2/24/00 Extraction Method EPA 5030E McOH <br /> Blank 0020239-B LK I <br /> Purgeable Hvdrocarbons 2/24/00 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 2 50 <br /> uoia Analytical- Sacramento *Refer to end of report for text of notes and definitions <br /> Page 6 of 9 <br />