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404 N Wlget Lane <br /> • Walnut Creek,CA 94598 <br /> 1 S e qu o la (925)98&9600 <br /> FAX(925)9W%73 <br /> Analytical www seqitoltaab$conn <br /> Aw - <br /> Gettler Ryan,lnc -Dublin Project Unocal <br /> 6747 Sierra Court Suite 3 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 Lnn t Units Dilution Batch Prepared Analyzed Method Notes <br /> U-22(W102669-23)Water Sampled 26-Feb-01 15 58 Received 28-Feb-01 16 50 <br /> text-Butyl alcohol ND 50 ug/1 1 IC07012 08-Mar-01 09-Mar-01 EPA 8260B <br /> Methyl text butyl ether ND 20 " <br /> Dr-isopropyl ether ND 20 " ,� <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 " <br /> Surrogate Drbromofluoromethane III % 50-150 r <br /> Surrogate 1,2 Dichloroethane-d4 874% 50-150 " <br /> U-23(W102669-24)Water Sampled 26-Feb-01 16 20 Received 28-Feb-01 16 50 <br /> tert-Butyl alcohol ND 50 ug/l 1 1C09010 09-Mar-01 09-Mar-01 EPA 8260B <br /> Methyl tert-butyl ether ND 20 1. " <br /> Di-isopropyl ether ND 20 It <br /> • <br /> Ethyl tert butyl ether ND 20 <br /> text Amyl methyl ether ND 20 <br /> S to Dibromofluoromethane 102% 50-150 " <br /> Su gate 1,2-Dichloroethane-d4 920% 50-150 " <br /> U-24(W102669-25)Water Sampled 26-Feb-01 17 10 Received 28-Feb-01 16 50 <br /> tert-Butyl alcohol ND 50 ug/1 1 1C09010 09-Mar-01 09-Mar-01 EPA 8260B <br /> Methyl tent butyl ether ND 20 <br /> Ds-isopropyl ether ND 20 <br /> Ethyl Cert-butyl ether ND 20 <br /> text Amyl methyl ether ND 20 <br /> Surrogate Dibromofluoromedme 104% 50-150 " <br /> Surrogate 1,2-Dichloroethaned4 870% 50-150 <br /> S*a Analytical-Walnut Creek The results in this report apply to the samples analyzed to accordance with the churn of <br /> custody document This analymcal report must be reproduced in its enhnty <br /> Page 10 of 32 <br />