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y' n <br /> k <br /> r 404 N VAget Lane <br /> Sequoia Walnut Geek,CA 94598 <br /> (925)988-9600 <br /> Analytical r 4 FAX(925)alabs corn n <br /> www sequallabs <br /> Gettler Ryan,Inc -Dublin , Project -Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#8671 Reported <br /> Dublin CA,94568 Project Manager Deanna L Hardmg I4-Aug-00 07 49 <br /> Volatile Organic,Compounds by EPA Method 8260B <br /> - m - Sequoia Analytical -Walnut Creek - - - - - - <br /> Reporting <br /> Analyte Result Limit, Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 (W008010-02)Water Sampled 28-Ju1-00 06 45 -Received' 31.Iu1-00 17 00 - <br /> tert-Butyl alcohol ND_ 1000_ug/l_10_ OH09012-09-Aug-00-09-Aug-00-_EPA 8260B T <br /> Methyl tert-butyl ether 1100 20 1. " <br /> Di-isopropyl ether ND 20 " " " It " <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate Dibromofluoromethane 100% 50-150 <br /> Surrogate 1,2Dtchloroethane-d4 860% 50-150 <br /> MW-2(W008010-03)Water Sampled 28-Jul-0008j'5 Received 31-Jul-00 17 00 <br /> tert-Butyl alcohol ND 100 ug/1 1 OH09012 09-Aug-00 09-Aug-00 EPA 8260B <br /> Methyl tert-butyl ether - ND - 20 <br /> Di-isopropyl ether ND 2 0 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether - `- - "ND 20 " " - " ' -•' " „ <br /> Surrogate Dibromofluoromethane 100 % 50-150 " <br /> Surrogate 1,2-Drchloroethane-& 900% 50-150 " <br /> MW-3(W008010-04)Water Sampled 28-Jul-000755 Received 31-Jul-00 17 00 <br /> tert-Butyl alcohol ND 100 ug/1 - 1 OH09012 09-Aug-00 09-Aug-00 EPA 8260B <br />- Methyl tert-butyl ether �ND`��"�2 0 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert butyl — <br /> tert-Amyl methyl ether ND_ _ 20 <br /> Surrogate Dibromofluoromethane 102 % 50-150 " <br /> Surrogate 1,2 Dichloroethane-d4 940% 50-150 " <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chaff <br /> custody document. This analytical report must be reproduced in its entrre <br /> Page 4 of 9 <br />