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Striker Avenue Suite 8 <br /> Sequoia $19 Sacramento CA 95834 <br /> ID (916)921-9600 <br /> Analytical FAX(916) 921-0'00 <br /> L <br /> International-Sacramento Protect ARCO 2133, Stockton,CA Sampled 12/16/99 <br /> usiness Park Dr, Ste 100 Project Number N/A Received 12/17/99 <br /> ento,CA 95827 Project Manager Rusty Benkosky Reported 1/4/00 <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 9120268 Date Prepared 12/21/99 Extraction Method EPA 50308 WOH <br /> Blank 9120268-B LK i <br /> Purgeable Hydrocarbons 12/21/99 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 250 <br /> Surrogate a a a-Trtfluorotoluene 100 926 60 0-140 926 <br /> LCS 9120268-B S 1 <br /> Benzene 12/21/99 100 926 ug/l 700-130 926 <br /> Toluene 100 9 57 700-130 95 7 <br /> Ethylbenzene too 943 700-130 94 3 <br /> X�(total) 300 28 6 700-130 95 3 - — <br /> M tert-butyl ether _ loo 8 95 700-130 89 5 <br /> Surrogate a a a-Trifluorotoluene 10 0 891 600-140 891 <br /> Matrix Snake 9120268-MSI 5912239-01 <br /> Benzene 12/21/99 10 0 ND 8 95 ug/l 600-140 89 5 <br /> Toluene 10 0 ND 927 600-140 92 7 <br /> Ethylbenzene 10 0 ND 940 600-140 940 <br /> Xylenes(total) 300 ND 295 600-140 98 3 <br /> Methyl tert-butyl ether 100 ND 8 89 600-140 889 <br /> Surrogate a,a,a-Trifluorololuene 100 867 600-140 867 <br /> Matrix Spike Dun 9120268-MSD1 5912239-01 <br /> Benzene 12/21/99 100 ND 907 ug/I 600-140 90 7 25 0 133 <br /> Toluene 100 ND 934 60 0-140 934 250 0 752 <br /> Ethylbenzene too ND 948 600-140 948 250 0 847 <br /> Xylenes(total) 300 ND 29 0 600-140 967 25 0 164 <br /> Methyl tert-butyl ether __ 10 0 ND 8 80_ 600-140 880 25 0 102 <br /> Surrogate a a a-Trifluorotoluene 10 0 867 600-140 867 <br /> Batch 9120272 Date Prepared 12/22/99 Extraction Method EPA 50305 McOH <br /> Blank 9120272-BLK1 <br /> Purgeable Hydrocarbons 12/22/99 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 /> M tent-butyl ether ND 250 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 4 of 7 <br />