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885 Jarvis Drive <br /> Sequoia <br /> Morgan Hill,GA 95037 <br /> 96W <br /> 1 (408)776-9600 <br /> FAX(408)782-6308 <br /> Analytical www.sequolala6s.com <br /> Gettler Ryan/Geostrategies-ToscolUnocal Project: - ' <br /> 6747 Sierra Ct,Suite J Project Number: Unocal SS#08671 Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 06/12/01 18:10 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 MKE0636-02 Water Sampled:05/26/01 11:35 Received:0512914107:15 <br /> Ethanol ND 80000 ugll 200 1F06001 06/05/01 06/07/01 EPA 8260A <br /> ten-Butyl alcohol ND 4000 <br /> Methyl tert-butyl ether 1610 200 <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 <br /> tert-Amyl methyl ether ND 200 " <br /> 1,2-Dichloroethane ND 200 <br /> Ethylene dibromide ND 200 <br /> Surrogate: 1,2-Dichloroethane-d4 962% 70-130 <br /> MW-2 MKE0636-03 Water Sampled:05126/0110:20 Received:05129/0107:15 <br /> Ethanol ND 400 ugfl 1 1F06001 06/05/01 06/05/01 EPA 8260A <br /> tert-Butyl alcohol ND 20.0 <br /> Methyl tent-butyl ether 3.77 1.00 <br /> Di-isopropyl ether ND 1.00 <br /> Ethyl tert-butyl ether ND 1.00 " <br /> tert-Amyl methyl ether ND 1.00 <br /> 1,2-Dichloroethane ND 1.00 <br /> Ethylene dibromide ND 1.00 <br /> Surrogate: 1,1-Dichloroethane-d4 89.1 % 70-130 " <br /> MW-3 KE0636-04 Water Sampled:05/2610109:45 Received:05129/0147:15 <br /> Ethanol ND 400 ugll 1 1 F06001 06/05/01 06/06/01 EPA 8260A <br /> tert-Butyl alcohol ND 20.0 " » <br /> Methyl tert-butyl ether 1.33 1.00 <br /> Di-isopropyl ether ND 1.00 " <br /> Ethyl tert-butyl ether ND 1.00 <br /> tett-Amyl methyl ether ND 1.00 <br /> 1,2-Dichloroethane ND 1.00 <br /> Ethylene dibromide ND 1.00 <br /> Surrogate: 1,2-Dichloroethane-d4 87.7% 70-130 11 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the cha._ <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page Page 4 of 10 <br />