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404 N Wiget Lane <br /> Sequoia Walnut Creek,9 94� <br /> FAX(925)988-9673 <br /> Analytical ,,,,ww sequolalabs tom <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 Harding 14-Mar-01 10 19 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Lunt Units Dilution Batch Prepared Analyzed Method Notes <br /> U-10(W102669-11)Water Sampled 27-Feb-01 1107 Received 28-Feb-01 16 50 <br /> tert-Butyl alcohol ND 50 ug/l 1 1 C07012 08-Mar-01 08-Mar-Ol EPA 8260B <br /> Methyl tert-butyl ether ND 20 1. " " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert butyl ether ND 20 <br /> tort-Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 102% 50-150 <br /> Surrogate 1,2-Dtch1oroed=e-d4 828% 50-150 10 <br /> U-11 (W102669-12)Water Sampled 27-Feb-01 10 16 Received 28-Feb-01 16 50 <br /> tent-Butyl alcohol ND 50 ug/1 1 1CO7012 08-Mar-01 08-Mar-01 EPA 8260B <br /> Methyl tert butyl ether ND 20 It " It " <br /> Di-isopropyl ether ND 20 It It " " <br /> Ethyl tent-butyl ether ND 20 " " It It " I. <br /> tert Amyl methyl ether ND 20 " <br /> S ate Dibromofluoromethane 112% 50-150 " <br /> SMWate 1,2 Dichloroethane-d4 942% 50-150 " <br /> U-12(W102669-13)Water Sampled 27-Feb-01 12 14 Received 28-Feb-01 16 50 <br /> tert-Butyl alcohol ND 50 ug/1 1 1 C07012 08-Mar-01. 08-Mar-01 EPA 8260B <br /> Methyl tert-butyl ether ND 20 tt 11 " <br /> Dl-isopropyl ether 32 20 <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether 42 20 <br /> Surrogate Dibromofluoromethane 106% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 898% 50-150 " <br /> Sla Analytical-Walnut Creek The results in taus report apply to the samples analyzed in accordance with the chain of <br /> custody document Tins analytical report must be reproduced in its entirety <br /> Page 6 of 32 <br />