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Sequoia T r r &m Qd CA M7"' <br /> (650)232-9600 <br /> o- FAX(650)232-9612 <br /> Analytical www sequoialabs corn <br /> Gelder-Ryan/Geostrategies(1),' Project Unocal(3) Sampled 11/22J00 <br /> 6747 Sierra Court,Suite J Project Number FORMER UNOCAL SS#0187 R"v'ed. 11/22/00 <br /> Dublin,CA 94568 Fro ect Manager Deanna Hardin 1215/00 ' <br /> Sample Description: NP-2-22 <br /> Laboratory Sample Number: L011216-14 T <br /> Batch Date Date Specific Method/ Reporting <br /> Anal f - Number Prepared_ Analyzed Syn2gate Limits _ Limit - Result Unita - Notes" <br /> Seguota Ana cal-Son Carlos <br /> Total Pureeable Hydrocarbons(C&C121,BTEX and MTBE by DH L , ' <br /> Purgeable Hydrocarbons as Gasoline 0120002 1211/00 1211/00 n '500 211 ug/1 1 <br /> Benzene " " 0 500 24.5 n <br /> Toluene " 0 500 3.13 " <br /> Ethylbenzene a 0 500 r 119 " <br /> Xylenes(total) ' ' n rt n 0 500 2.24 " <br /> Methyl tert-bu 1 ether rt 500 ND n <br /> Surrogate a,a,a-Th luorotoluene 70 0-130 — t pOl , go <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B <br /> Tert-butyl alcohol 0110138 11/29/00 11/30/00 100 ND ug/1 i <br /> Methyl tort-butyl ether " ` 2 00 ND " <br /> Di-isopropyl ether 2 <br /> Ethyl tertbutyl other Y n n n ND <br /> 200 ND <br /> Tert-amyl methyl aher T - --M " �w n _ 2 00 ND <br /> Surrogate 1,1 Dichloroethane-d4 76 0-114 974 % <br /> j <br /> 4 <br /> Sequoia Analytical-San Carlos •Refer to end of report for text of notw and definitions <br /> Page 15 of 23 <br />