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819 Sinker Ave Ste 8 <br /> Sacramento CA 95834 <br /> Sequoia (916)921-9600 <br /> tD FAX(916)921-0100 <br /> Analytical www sequoialabs corn <br /> Gettler-Ryan-Dublin Project Former Unocal 2859,Stockton,CA 5308609 <br /> 6747 Sierra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 09/11/03 14 34 <br /> Volatile Organic Compounds by EPA Method 8260E - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3080407-EPA 5030B PIT <br /> Blank(3080407-BLK1) Prepared&Analyzed 08/29/03 <br /> Tert-butyl alcohol ND so ug/l <br /> Methyl tert-butyl ether ND 050 " <br /> Di-tsopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Surrogate 1,2-DCA-d4 171 " 250 68 60-140 <br /> Laboratory Control Sample(3080407-BS1) Prepared&Analyzed 08/29/03 <br /> Meth 1 tert-butyl ether 197 050 11911 248 79 60-140 <br /> S4WIe 1,2-DCA-d4 192 250 77 60-140 <br /> Laboratory Control Sample Du (3080407-BSD1) Prepared&Analyzed 08/28/03 <br /> Methyl tert-butyl ether 166 050 ug/l 248 67 60-140 17 25 <br /> 11 <br /> Surrogate 12-DCA-d4 178 25 0 71 60-140 <br /> Matrix Spike(3080407-MSI) Source 5308504-02 Prepared&Analyzed 08/29/03 <br /> Methyl tert-butyl ether 18 8 050 ugA 24 8 ND 76 60-140 <br /> Surrogate 1,2-DCA-d4 168 250 67 60-140 <br /> Batch 3090107-EPA 5030B [PIT <br /> Blank(3090107-BLKI) Prepared&Analyzed 09/08/03 <br /> Tert-butyl alcohol ND 5 0 119/1 <br /> Methyl tert-butyl ether <br /> ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Tent-amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Surrogate 1,2-DCA-d4 114 250 90 60-140 <br /> Ak <br /> The results in this report apply to the samples analyzed in accordance with the chain of <br /> STUOia Analytical - Sacramento <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 />