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444 N W Set Lane <br /> Sequoia E Walnut Geek,CA 9590 <br /> ' (925)988-9600 <br /> FAX(925)988-9673 <br /> Analyticals <br /> www sequo[alabs corn <br /> y S <br /> E <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal iY0187 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-1 (W102669-02)Water Sampled 26-Feb-01 12 05 Received 28-Feb-01 16-50 <br /> tent-Butyl alcohol ND 50 ug/I 1 1C05013 06-Mar-01 06-Mar-Ol EPA 8260B <br /> Methyl tert-butyl ether 19 20 <br /> Dr-isopropyl ether ND 20 <br /> Ethyl tent-butyl ether ND 20 <br /> tert Amyl methyl ether ND 20 <br /> Surrogate Dibromofluoromethane 102% 50-150 <br /> Surrogate 1,2-D+chloroethaned4 890% 50-150 " <br /> - U-2(W102669-03)Water Sampled 26-Feb-01 13 21- Received 28-Feb-01 16 50 <br /> tett-Butyl alcohol ND 50 ug/1 1 1C05013 06-Mar-01 06-Mar-Ol EPA 9260B <br /> Methyl tert-butyl ether ND _ -20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 2 0 <br /> tert-Amyl methyl ether 20 Y 20 <br /> Surrogate Dtbrornofluorom- thane 104 % µ 50-150 <br /> Surrogate 1,2Dichloroethane-d4 864% 50-150 " <br /> I <br /> U-3(W102669-04)Water Sampled 27-Feb-01 15 51 Received 28-Feb-01 16 50 <br /> tert-Butyl alcohol ND 50 og/1 1, 1 005013 06-Mar-01 06-Mar-01 EPA MOB <br /> Methyl tart-butyl ether— <br /> Di-isopropyl ether ND 20 <br />-YEthy1 tart->iutyl ether-- - - --- _ - ----- 1JD=�� ---=-2 0 --=--„=- -- , - _• -„ _- ---„---==- =-- .�=_`_^ - -=,.r_ �_.__ - <br /> tert-Amyl methyl ether 33 _ 20 <br /> Surrogate Dibromofluoromethane 101 % 50-150 ” <br /> Surrogate 1,2-Dichloroethaned4 926% 50-150 " <br /> i <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the than <br /> custody document This analytical report must be reproduced in its entire <br /> Page 3 of 32 <br />