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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4 (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> ISECOR International Project ARCO 2093,Tracy,CA Sampled 8/18/99 <br /> 9912 SUSIness Park Dr, Ste t00 Project Number 077-41728 001 Received 8/19/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Re orted 8/30/99 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE to Air(ppmv) by DHS LUFT <br /> Sequoia Analytical- Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> INFLUENT S908223-01 Air <br /> Purgeable Hydrocarbons 9080167 8/20199 8/20/99 240 192 ppmv 1 <br /> Benzene 0 0160 ND <br /> 00130 ND <br /> Toluene " " <br /> " <br /> oluen <br /> Ethylb <br /> enzene 00120 00682 " <br /> Xylenes(total) 00120 08980140 <br /> 898 " <br /> Methyl tert-butyl ether 0 140 ND _ <br /> Surrogate a a a-Trifluorotoluene 600-140 970 % <br /> EFFLUENT S908223-02 Air <br /> Purgeable Hydrocarbons 9080167 8/20/99 8/20/99 240 ND ppmv <br /> Benzene 0 0160 ND " <br /> Toluene 0 0130 ND <br /> Ethytbenzene 0 0120 ND <br /> (total) 0MW 0120 00206 , <br /> tert-butyl ether 0 140 _ ND <br /> Surrogate a a,a-Trifluorotoluene T 600-140 93 0 % <br /> Sequoia Analytical-Sacramento *Refer to end of report for test of notes and definitions <br /> Page 3 of 6 <br />