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819 Sinker Ave Ste 8 <br /> 4DSequoia Sacramento <br /> A 6) 998600 <br /> iW Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> 1� - <br /> Gettler-Ryan-Dublin Project Former Unocal 2859,Stockton,CA 5308609 <br /> 6747 Sierra Court,Ste 9 Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 09/11/03 14 34 <br /> Volatile Organic Compounds by EPA Method 8260B -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 3090107-EPA 5030B PIT <br /> Laboratory Control Sample(3090107-BS1) Prepared&Analyzed 09/08/03 <br /> Methyl tert-butyl ether 205 050 ugll 250 82 60-140 <br /> Surrogate 1 2-DCA-d4 210 250 84 60-140 <br /> Matnx Spike(3090107-MS1) Source 5309121-09 Prepared 09/08/03 Analyzed 09/09/03 <br /> Methyl tert-butyl ether 202 050 ug/l 250 ND 81 60-140 <br /> Surrogate 12-DCA-d4 218 250 87 60-140 <br /> Matnx Spike Dup(3090107-MSD1) Source 5309121-09 Prepared 09/08/03 Analyzed 09/09/03 <br /> Methyl tert-butyl ether _ _ 201 050 ug/l 250 ND 80 60-140 05 25 _ <br /> Surrogate 1,2-DCA-d4 223 250 89 60-140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed to accordance with the chant of <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 19 of 20 <br />