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404 N Wlget Lane <br /> Walnut Geek CA 94598 <br /> Sequoia (925)988-9600 <br /> FAX(925)98&9673 <br /> Analytical www sequoialabs corn <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#0187 Reported <br /> Dublin CA,94568 Project Manager Deanna L Hardmg 14-Mar-01 10 19 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Lirnit Units Dilution Batch Prepared Analyzed Method Notes <br /> NP-1-111 (W102669-29)Water Sampled 27-Feb-01 13 45 Received 28-Feb-01 16'50 <br /> telt-Butyl alcohol ND 50 ug/1 1 1C09010 09-Mar-01 09-Mar-01 EPA 8260B <br /> Methyl tert-butyl ether ND 20 " " " " It " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert butyl ether ND 20 <br /> tert Amyl methyl ether ND 20 <br /> Surrogate Dibromofluoromethane 970% 50-150 " <br /> Surrogate 1,2 Dichloroethane-d4 740% 50-150 " <br /> NP-2-22(W102669-30)Water Sampled 27-Feb-0109 15 Received 28-Feb-01 16 50 <br /> tert-Butyl alcohol ND 50 ug/1 1 1C09010 09-Mar-01 09-Mar-01 EPA 8260E <br /> Methyl tent-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tent butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 " <br /> ate Dibromofluoromethane 100 % 50-150 " <br /> gate 1,2-Dichloroethane-d4 786% 50-150 " <br /> NP-2-60(W102669-31)Water Sampled 27-Feb-01 12 00 Received 28-Feb-01 16 50 <br /> Cert-Butyl alcohol ND 50 ug/1 1 1C09010 09-Mar-01 09-Mar-01 EPA 9260B <br /> Methyl tert-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tent-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate Dibromofluorom ethane 100 % 50-150 " <br /> Surrogate 1,2-Dichloroethane-0 126% 50-150 S-04 <br /> S oia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody documeta This analytical report must be reproduced in its entirety <br /> Page 12 of 32 <br />