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1 Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> IT Corporation-Sacramento Protect Tosco 4409, Stockton,CA Sampled 12/9/99 to 12/10/99 <br /> 1433N Market Blvd,Ste I Project Number 911-011 1B Received 12/13/99 <br /> Sacramento,CA 95834 Project Manager Mark Capps Reported 12/21/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFF/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Anal a <br /> Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9120174 Date Prepared- 12/14/99 Extraction Method EPA 5030E Me0 <br /> Blank 9120174-BLK1 <br /> Purgeable Hydrocarbons 12/14/99 ND mg/kg 100 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Methyl tert-butyl ether itND 00500 <br /> Surrogate a a a-Triuorotoluene to0200 0209 10600-140 105 <br /> LCS 9120174-BS1 <br /> Benzene 12/14/99 0200 0209 mg/kg 700-130 105 <br /> Toluene to 0200 0214 700-130 107 <br /> Ethylbenzene 14 0200 0 211 700-130 105 <br /> Xylenes(total) 00 0 600 0 634 700-130 106 <br /> Methyl tert-butyl ether 0200 0 193 700-130 965 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0 212 600-140 106 -AD <br /> Matrix Spike 9120174-MS1 5912145-03 <br /> Benzene 12/14/99 0200 ND 0 173 mg/kg 600-140 $65 <br /> Toluene 0200 ND 0 174 to 600-140 870 <br /> Ethylbenzene 0200 ND 0 174 600-140 870 <br /> Xylenes(total) 0 600 ND 0 521 600-140 868 <br /> Methyl tert-butyl ether 0200 ND 0 163 600-140 815 <br /> Surrogate a s a-Trifluorotoluene 0200 0207 to600-140 103 <br /> Matrix Spike Dun 9120I74-MSD1 S912145-03 <br /> Benzene 12/14/99 0200 ND 0 178 mg/kg 600-140 890 250 2.85 <br /> Toluene 0200 ND 0 181 to60 0-1.40 905 250 394 <br /> Ethylbenzene 0200 ND 0 179 600-140 89.5 250 283 <br /> Xylenes(total) 0 600 ND 0 538 600-140 89.7 25 0 3.29 <br /> Methyl tert-butyl ether 0200 ND 0 168 600-140 840 250 3.02 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0209 600-140 105 <br /> Sequoia Analytical- Sacramento '"Refer to end of report for test of notes and definitions <br /> Page 9 of 13 <br />