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404 N WEget Lane <br /> Sequoia Walnut Creek,925)988-49600 <br /> FAX(925) 988-9673 <br /> Analytical %%wwsequ°lalabs`°m <br /> Gettler Ryan,Inc -Dublm Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#0187 Reported <br /> Dublm CA,94568 Project Manager Deanna L Harduig 14-Mar-01 10 19 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Rep <br /> Analyte Result <br /> Reporting <br /> Units Dilution Batch Prepared Analyzed Method Notes <br /> U-16 (W102669-17)Water Sampled 26-Feb-01 14 15 Received 28-Feb-01 16 50 <br /> tent-Butyl alcohol ND 50 uFA 1 1C07012 08-Mar-01 08-Mar-01 EPA 8260E <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " •' <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 103 % 50-150 " <br /> Surrogate 1,1 Dtchloroethane-d4 802% 50-150 " <br /> U-17(W102669-18)Water Sampled 26-Feb-01 14 35 Received 28-Feb-01 16 50 <br /> tert-Butyl alcohol ND 50 ug/1 1 IC07012 08-Mar-01 08-Mar-01 EPA 82608 <br /> Methyl text-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> SlAwte Dibromofluoromethane 105% 50-150 " <br /> SJXKate 1,2-Dichloroethane-& 856% 50-150 " <br /> U-18 (W102669-19)Water Sampled 26-Feb-01 15 25 Received 28-Feb-01 16 50 <br /> tert-Butyl alcohol ND 50 ug/l 1 IC07012 08-Mar-01 09-Mar-01 EPA 8260B <br /> Methyl tert butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 110% 50-150 " <br /> Surrogate 1,2 Dichloroethane-d4 914% 50-150 " <br /> SW Analytical-Walnut Creek The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 8 of 32 <br />