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Sequoia 819 Striker Avenue,Suite 8 <br /> 41) Sacramento,CA 95834 <br /> (916)921-9600 <br /> qQF Analytical <br /> fAX(916)921-0100 <br /> *EO-N/Pinnacl,-Sacramento Project ARCO 548,Stockton,CA Sampled 9/10/99 <br /> 1433 N Market Blvd Project Number 21775-206 003 Received 9110/99 <br /> Sacramento,CA 95834 Pro ect Manager Dave Foley Reported 9124/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Conerol <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 /> Blank(conte_n__-__ued) 9090206-BLK1 <br /> Surrogate a,a,a-Trifluorotoluene 9120199 100 953 ug/1 600-140 953 <br /> US 9090206-13Sl <br /> Benzene 9/20/99 100 928 ug/l 700-130 928 <br /> Toluene " 100 9 23 1. 700-130 923 <br /> Ethylbenzene 100 926 10700-130 926 <br /> Xylenes(total) to 300 278 " 700-130 927 <br /> Methyl tert-butyl ether 100 101 " 700-130 101 <br /> Surrogate a,a,a-Triuorotoluene to 100 101 It <br /> 600-140 101 <br /> Matrix SnilreSn�lre 9090206-M.91 S909142-04 <br /> Benzene 9/20/99 100 ND 9 03 ug/l 600-140 903 <br /> Toluene or 100 ND 8 81 " 600-140 881 <br /> Ethylbenzene 100 ND 896 600-140 896 <br /> X nes(total) 300 ND 267 600-140 890 <br /> I tert-butyl ether 100 ND 13 4 600-140 134 <br /> S ogate a,a a-Triuorotoluene " 100 940 600-140 940 <br /> Matrix Spike Dun 9Q90206-MSD1 S909142-04 <br /> Benzene 9120199 100 ND 9 11 ug/I 600-140 911 25 0 4 882 <br /> Toluene to 100 ND 8 89 to 600-140 88 9 25 0 0 904 <br /> Ethylbenzene to 100 ND 9 03 " 600-140 903 250 0 778 <br /> Xylenes(total) 300 ND 269 600-140 897 250 0 783 <br /> Methyl tert-butyl ether 100 ND 13 7 600-140 137 250 2 21 <br /> Surrogate a a a-Trifluorotoluene 100 911 " 600-140 911 <br /> a Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 5 of 6 <br />