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Sequoia <br /> 819 Striker Avenue, 958.8 <br /> L. i Sacramento, CA 95834 <br /> (916)921-9600 <br /> FAX <br /> Analytical <br /> www.Sequoialabs.carn <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 5469,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: N/A Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 10/01/01 15:20 <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 1090294-EPA 5030B [PIT) <br /> Blank(1090294-BLKI) Prepared&Analyzed:09/27/01 <br /> Tert-butyl alcohol ND 200 ug/l <br /> Methyl tert-butyl ether ND 2.0 " <br /> Di-isopropyl ether ND 2.0 „ <br /> Ethyl tert-butyl ether ND 2.0 " <br /> Tert-amyl methyl ether ND 2.0 „ <br /> Ethanol ND 3000 " <br /> 1,2-Dichloroethane ND 2.0 " <br /> Ethylene dibromide ND 2.0 " <br /> Surrogate: 1,2-DCA-d4 46.9 50.0 93.8 60-140 <br /> LCS(1090294-BS1)___.___._-.______.__._ __ Prepared&Analyzed: 09/27/01 <br /> yl tert-butyl ether 51.9 2.0 ugh 50.0 104 60-140 <br /> ogate: l,2-DCA-d4 51.5 50,0 103 60-140 <br /> Matrix Spike(1490294-MSl) _ __ Source: 5109255-01 _Prepared&Analyzed:09/27/01 <br /> Methyl tert-butyl ether- _ - 49.5 2.0 ugh 50.0 M7 99.0 60-140 �- <br /> Surrogate:l,2-DCA-d4 49.9 50.0 99.8 60-140 --- <br /> Matrix Spike Dup(1090294-MSD1) _ Source: S109255-01 Prepared&Analyzed: 09/27/01 <br /> Methyl tert-butyl ether 49.3 2.0 ug/1 50,0 ND 98.6 60-1400.405 25 <br /> Surrogate:1,2-DCA-d4 49.6 50.0 99.2 60-140 <br /> Batch I090308- EPA 5030E IP/TI <br /> Blank(1090308-BLKI) - _ Prepared&Analyzed: 09/28/01 <br /> Teri-butyl alcohol ND 200 ug/I <br /> Methyl tent-butyl ether ND 2.0 " <br /> Di-isopropyl ether ND 2,0 " <br /> Ethyl tent-butyl ether ND 2.0 " <br /> Tert-amyl methyl ether ND 2.0 " <br /> Ethanol ND 3000 " <br /> 1,2-Dichloroethane ND 2.0 " <br /> Ethylene dibromide ND 2.0 " <br /> Surrogate: 1,2-DCA-d4 50.7 �" 50.0 101 60-140 <br /> uoia Analytical - Sacramento The results in this report apply 10 the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 9 of 13 y <br />