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' 1551 fndustnal [load <br /> Sequoia San Carlos, CA 94070-4111 <br /> (650) 232-9600 <br /> Analytical FAX(650) 232-9612 <br /> Gettler-Ryan/Geostrategies(i) Project Unocal(1) Sampled 11/23/99 <br /> 6747 Sierra Court,Suite D Project Number Unocal SS#0187/Job#280045 Received 11/24/99 <br /> Dublin,CA 94568 Project Manager Deanna Harding Reported 12/10/99 <br /> Sample Description- U-5 <br /> Laboratory Sample Number L911275-06 <br /> Batch Date Date Specific Method/ Reporting <br /> LA,alyte Number Pr arecl Analyzed Surrogate Limits Limit Result Units Notes* <br /> Sequoia Analytical-San Carlos <br /> Total Purgeable Hydrocarbons(Cti-C12),BTEX and MTBE by DHS LUFT <br /> Purgeable Hydrocarbons as Gasoline 9120023 1216199 12/6/99 500 ND ug/1 <br /> Benzene It " 0 500 131 " <br /> Toluene It <br /> It 0 500 8 77 " <br /> Ethyibenzene 0 500 0 936 " <br /> Xylenes(total) 0 500 496 " <br /> Methyl tert-butyl ether IF 500 882 " <br /> Surrogate a aa-7'nfluorotoluene IF <br /> 700-130 852 % <br /> Volatile Orzanic Oxvsenated Compounds by EPA Method 8260A <br /> Ethanol 9120004 12/1199 12/1/99 1000 ND ug/1 <br /> Tert-butyl alcohol " 11 1. 200 ND " <br /> Methyl tert-butyi ether IF 1. 200 508 " <br /> ropyl ether 200 ND <br /> EgWert-butyl ether 200 ND <br /> Tert-amyl methyl ether 2 00__ ND " <br /> Surrogate 12-Dichloroethane-d4 IF _ If <br /> 760-114 113 % <br /> - 0 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 7 of 28 <br />