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8 19 <br /> te 8 <br /> Sequoia cmine ilcar Ave 5934 <br /> Saciameiuo,CA 95834 <br /> ,2� (916)921-96W <br /> Analytical FAX(916)921-0100 <br /> www wgwislabs com <br /> Gettler-Ryan-Dublin Project Former Unocal 2859,Stockton,CA 5305466 <br /> 6747 Sierra Court,Ste ] Project Number NIA Reported - <br /> Dublin CA,94568 Project Manager Deanna L Harding 06/03/03 18 41 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Rbsult Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batcb 3050528-EPA 5030B JPfr] <br /> Blank(3050528-BLK1) Prepared&Analyzed 05/30/03 <br /> Tertbutyl alcohol ND 50 ug/1 <br /> Methyl tert-butyl ether ND 10 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethane(EDB) - ND 050 " <br /> Surrogate 12-DCA-d4 - 212 = 250 85 60-140 - - - - <br /> Blank(3050528-BLK2) r Prepared&Analyzed 05/31/03 _ <br /> Tert-butyl alcohol ND so +ug/l <br /> Methyi tort-butyl ether ND 10 <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tort-butyl ether ND 050 " <br /> Teri-amyl methyl ether ND 050 _ l <br /> Ethanol_— �ND 50---„ — - --- _—� � <br /> 1,2-Dichloroethane ND' 050 " <br /> ND----�=---0 50— "-----= ----=---— --- -- -- _ --- -- - - --- — <br /> Surrogate 1,1-DCA-d4 261 250 104 60-140 <br /> Laboratory Control Sample(3050528-BSI) Prepared&Analyzed 05/30/03_ <br /> Methyl tent-butyl ether 164 10 ug/1 224 73 60-140 <br /> Surrogate 1,2-DCA-d4 115 250 90 60-140 <br /> Laboratory Control Sample(305_052$-BS2) Prepared&Analyzed 05/31/03 <br /> Methyl tertbutyl ether 228 10 ugh 224 102 60-140 <br /> Surrogate I 1-DCA-d4 274 250 110 60-140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document Unless otherwise stated,results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 18 of 20 <br />