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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Cambria Environmental Project Shell,2494 Fremont,Stockton,CA Sampled 4/24198 <br /> 270 Perkins Street Project Number N/A Received 4/27/98 <br /> Sonoma,CA 95476 Project Manager Mike Murphy Reported 5/12/98 <br /> ---Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> ry _ Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Lltnit Recov RPD RPD <br /> Anal e Analyzed Level Result Result Units Recov Limits % Limit % Nates* <br /> Blank(continued/ 8050084-BLKI <br /> Surrogate a a a-Tnfluorotoluene 515198 0200 0196 mg/kg 600-140 980 <br /> LCS 8050084-BSI <br /> Benzene 5/5/98 0200 0 214 mg/kg 700-130 107 <br /> Toluene 0200 0 198 700-130 990 <br /> Ethylbenzene 0200 0 192 700-130 960 <br /> Xylenes(total) 0 600 0 575 700-130 95 8 <br /> Methyl tert-butyl ether 0200 0 199 700-130 995 <br /> Surrogate a,a,a-Tnfluorotoluene 0200 0202 600-140 101 <br /> Majux3pike 8050084-MS1 8$492 <br /> Benzene 515/98 0200 ND 0 191 mg/kg 600-140 955 <br /> Toluene 0200 ND 0 181 600-140 905 <br /> Ethylbenzene 0200 ND 0 179 600-140 895 <br /> Xylent;s(total) 0 600 ND 0 541 600-140 902 <br /> Methyl tert-butyl ether 0200 ND 0 170 600-140 850 <br /> Surrogate a,a a-Tnfluorotoluene 0200 0200 600-140 100 <br /> Matrix Spike Dun 8050084-MSD1 5804235-09 <br /> Benzene 5/5/98 0200 ND 0 188 mg/kg 600-140 940 25 0 158 <br /> Toluene 0200 ND 0 174 600-140 870 250 394 <br /> Ethylbenzene 0200 ND 0 178 600-140 890 250 0 560 <br /> Xylenes(total) 0 600 ND 0 539 600-140 898 250 0 444 <br /> Methyl tert-butyl ether 0200 ND 0 158 600-140 790 250 732 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0205 600-140 102 <br /> SAndaC <br /> cal-Sacramento *Refer to end of report for text of notes and defin, <br /> Page 4 of 5 <br /> der, aboratory Director <br />