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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> ,! 1 (916)921-9600 <br /> 100 <br /> �„w Analytical FAX equo 42bs com <br /> www sequolalabs com <br /> Delta Environmental Consultants-Cameron Park Project ARCO 548, Stockton,CA Sampled 9/28/00 <br /> 3330 Cameron Park Dr Project Number N/A Received 9128100 <br /> Cameron Park,CA 95682 Project Manager Jay Johnson Reported Q/29100 <br /> Total Purgeable Hydrocarbons(C6-Cl2),BTEX and MTBE in Air by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Nates* <br /> Eff 5009405-01 Air <br /> Purgeable Hydrocarbons 0090293 9128/00 9/28/00 100 19 7 mg/m'Air 1 <br /> Benzene 00500 0 214 " <br /> Toluene 00500 0 247 " <br /> Ethylbenzene 00500 0 217 " <br /> Xylenes(total) 00500 128 <br /> Methyl tert-butyl ether 0 500 ND <br /> Surrogate a,a,a-Tris luorotoluene 600-140 83 0 % <br /> In f S009405-02 Air <br /> Purgeable Hydrocarbons 0090331 9/29/00 9/29/00 500 9870 mg/m3 Air 1,D <br /> Benzene 250 601 D <br /> Toluene 2 50 439 D <br /> Ethylbenzene 250 207 D <br /> Abes(total) 250 874 D <br /> yl tert-butyl ether 25 0 416 D <br /> Surrogate a a,a-Trii luorotoluene " " 600-140 137 %0 <br /> T Inf S009405-03 Air <br /> Purgeable Hydrocarbons 0090331 9/29/00 9/29/00 250 2650 mg/m'Air 1,D <br /> Benzene 125 9 83 D <br /> Toluene 125 116 D <br /> Ethylbenzene " " 1 25 559 D <br /> XyIenes(total) 1 25 241 D <br /> Methyl tert-butyl ether 125 123 D <br /> Surrogate a,a,a-Trifluorotoluene 600-140 101 % <br /> Sequoia Analytical- Sacramento *Refer to end ofreport for text ofnotes and definitions <br /> Page 2 of 7 <br />