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819 Stnker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> ,!ZN (916)921-9600 <br /> Analytical FAX (916)92 1-0100 <br /> SECOR International Project ARCO 2093,Tracy,CA Sampled 7/27/99 <br /> 9912 Business Park Drive, Ste 100 Project Number N/A Received 7/28/99 <br /> Sacramento,CA 95827 Protect Manager Rusty Benkosky Re orted 8/10/99 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE in 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 /> jnflugn[ S907302-01 Air <br /> Purgeable Hydrocarbons 9070313 7/29/99 7/29/99 240 50 4 ppmv l <br /> Benzene 00160 ND " <br /> Toluene 00130 ND " <br /> Ethylbenzene 00120 0179 " <br /> Xylenes(total) 00120 121 " <br /> Methyl tert-butyl ether 0 140 ND " <br /> Surrogate a,a,a-Triuorotoluene 600-140 120 % <br /> Ef uen S907302-02 Air <br /> Purgeable Hydrocarbons 9070313 7/29/99 7/29/99 240 276 ppmv 1 <br /> Benzene 0 0160 ND " <br /> Toluene 00130 ND " <br /> Ethylbenzene 0 MO ND " <br /> aes(total) 00120 00960 " <br /> yl tert-butyl ether 0 140 ND " <br /> Surrogate a a a-Tri luorotoluene 600-140 850 % <br /> eguoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 3 of 6 <br />