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Gcgler-Ryan/Geostrategies(1) Project. Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number Tosco(Unocal)SS#6981 Rett <br /> Dublin CA,94568 Project M8°agcr Deanna Harding 07/12/01 06 51 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical-San Carlos <br /> RSB Ividbod N <br /> Analyte Resuh Lama harts D7utwn Batch Prepared AnaYzed <br /> MW-1(1,106220-02)Water Sampled 06/27/011135 Received 06/28/0107-50 <br /> Ethanol ND 1000 ug/1 1 1070013 07/03/01 07/06/01 EPA 8260B <br /> 1,2-Dibromoethane ND 20 <br /> 1,2-Dichloroethane ND 20 <br /> 0 " <br /> Di-isopropyl ether ND 2 <br /> Ethyl tert-butyl ether ND 20 <br /> ND 20 <br /> Methyl tent-butyl ether <br /> " <br /> Teri-amyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dtahloroethane-d4 792% 76-114 <br /> Surrogate Toluene-l8 <br /> 984% 88-110 " <br /> MW-2(L106220-03)Water Sampled.06/2710112 30 Received 06/28/0107:50 <br /> W <br /> f 07/05/01 07/06/01 EPA 8260B <br /> ND 1000 ug/i 1 1070022 <br /> bromoethane ND 20 " <br /> 2 0 <br /> 1,2-Dichloroethane ND <br /> Di-isopropyl 20pyl ether <br /> Ethyl tartbND 20utyl ether " <br /> 47 2U <br /> Methyl tert-butyl ether ND 2 0 <br /> Tert-amyl methyl ether <br /> Tert-butyl alcohol ND i00 " <br /> Surrogate 1,1-Dichloroethane-d4 794% 76-114 " <br /> Surrogate Toluene-d8 <br /> 990% 88-110 <br /> MW4(L106220-04)Water Sampled 06/26/01 14.25 Received 06/2810107:50 <br /> Ethanol ND 1000 ug/1 1 1070022 07/05/01 07/06/D1 EPA 8260E <br /> 2a <br /> 1,2-Dibromoethane � <br /> 1,2-Dichloroethane ND 20 <br /> ND 20 <br /> Di-isopropyl ether " <br /> Ethyl tert-butyl ether ND2 0� 20 " <br /> Methyl Cert-butyl ether <br /> Tert-amyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2 Dichloroethane-d4 800% 76-114 " <br /> Surrogate Toluene-d8 102% 88-110 " <br /> —Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. 7hts analytical report must be reproduced in its entirety <br /> Page 8 of 22 <br />