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z , <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(4) <br /> 6747 Sierra Court,Suite J ProjectNumber Former Unocal SS#0187 Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05/30/01 13 32 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical- San Carlos <br /> Reporung <br /> Analyte Result Lmit Units Dilnhoa Hatch Prepared Analyzed Method Notes <br /> U-5(L105144-06)Water Sampled 0511510109:36 Received 05/16/01 19 45 <br /> Tert-butyl alcohol ND 100 ug/1 1 1050081 05/18/01 05/18/01 EPA 8260B <br /> Methyl tert-butyl ether ND 200 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Surrogate 1,2-Dichloroethane-d4 868% 76-114 " <br /> U-6(L105144-07)Water Sampled 05/15/0109.04 Received 05/16/01 19 45 <br /> Tert-butyl alcohol ND 100 ug/1 1 1050081 05/18/01 05/18/01 EPA 8260B <br /> Methyl tert-butyl ether - ND - 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether -ND - 200- <br /> Surrogate <br /> 00-Surrogate 1,2-Dichloroethane-l4 - - - - --- 902% - 76-114 - <br /> U-7(1.105144-08)Water Sampled:05/15/0110 58 Received 05/16/0119 45 <br /> Tert-butyl alcohol ND 100 ug/l 1 1050081 05/18/01 05/18/01 EPA 8260B <br /> --..Methyl tent-butyl ether _ - β€”- - ------ND-------2 00- <br /> -Di-isopropyl ether <br /> Ethyl tert-butyl ether ND 200 " <br /> Tert-amyl methyl ether =-β€” -~----β€”ND------2 00 - <br /> Surrogate 1,2-Dichloroethane-d4 900% 76-114 " <br /> - -- - <br /> U-8(L105144-09)Water Sampled 05/15/0111-45 Received-05/1610119 45 ` <br /> Tert-butyl alcohol ND 100 ugll 1 1050081 05/18/01 05/18/01 EPA 8260E <br /> Methyl tert-butyl ether ND 200 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND' 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Surrogate 1,2-Dichloroethane-d4 854% 76-114 " <br /> Sequoia Analytical-San Carlos Ae results in this report apply to the samples analyzed in accordance with the cha <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 15 of 33 <br />