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� • 680 Chesapeake Drive Redwood Ci CA 94063 <br /> Sequoia (650}364-9600 FAX(650}364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)9$8-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> 41) 455 l Blvd <br /> WO Analytical :551 Industrial Road North Ste D San Petaluma <br /> Carlos CA 94070-4111 (650)232-9600 FAX(6 0)232-9612 <br /> Emcon-Pinnacle Project Arco 2168,Stockton,CA Sampled 5/25/99 <br /> 3939 Cambridge Road,Ste 202 Project Number 21775-234004 Received 5/25/99 <br /> Cameron Park,CA 95682 Project Manager Dave Foley Reported 6/8199 <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 /> Blank(continued) 206OJ09-�BLK <br /> Surrogate a a a-Tris luorotoluene 6/4/99 100 836 ug/1 600-140 836 <br /> LEI I 906Q109-BS 1 <br /> Benzene 6/4/99 too 8 80 ug/1 700-130 880 <br /> Toluene 100 8 82 700-130 882 <br /> Ethylbenzene 100 857 700-130 85 7 <br /> Xylenes(total) 300 26 1 700-130 870 <br /> Methyl tert-butyl ether 100 104 700-130 104 <br /> Surrogate a a a-Trifluorololuene 100 833 600-140 83 3 <br /> Matrix Spike 9Q60102-MSI S905412-05 <br /> Benzene 6/4/99 too ND 906 ugll 600-140 906 <br /> Toluene 100 ND 893 600-140 893 <br /> Ethylbenzene 100 ND 947 600-140 947 <br /> nes(total) 300 ND 273 600-140 91 0 <br /> yl tent-butyl ether loo ND 9 78 r 600-140 978 <br /> Surrogate a,a,a-Trnfluorotoluene 100 847 600-140 84 7 <br /> Matrix Spike Duo 9060109-MSD1 5905412-05 <br /> Benzene 614/99 10 0 ND 9 04 ug/l 600-140 904 25 0 0 221 <br /> Toluene 10 0 ND 894 600-140 894 250 0 112 <br /> Ethylbenzene 100 ND 952 600-140 952 25 0 0 527 <br /> Xylenes(total) 300 ND 276 600-140 920 25 0 109 <br /> Methyl tert-butyl ether 10 0 ND 12 3 600-140 123 250 228 <br /> Surrogate a a a-Trifluorotoluene 10 0 836 600-140 83 6 <br /> to Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Ronald W Bobel,Client Services Representative Page 7 of 9 <br />