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Sequoia819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(91 G) 921-0100 <br /> vwvw.sequolalabs.com <br /> Delta Environmental COnsultantS(Cameron Park) Project: ARCO 5469, Stockton, CA <br /> 3330 Cameron Park Dr. Project Number: NIA Reported: <br /> Catrseron Park CA,95682 Project Manager: Jay Johnson 04/04/01 17:07 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source °/OREC RPD <br /> Analyte Result Limit Units Level Result °/nREC Limits RPD Limit ]dotes <br /> Batch 1040011 -EPA 5030E [P/T <br /> Blank(1040011-BLKI) Prepared&Analyzed:04/02/01 <br /> Tert-butyl alcohol ND 200 ugA <br /> Methyl tert-butyl ether ND 2.00 " <br /> Di-isopropyl ether ND 2.00 " <br /> Ethyl tert-butyl ether ND 2.00 " <br /> Teri-amyl methyl ether ND 2.00 " <br /> Ethanol ND 3000 " <br /> 1,2-Dichloroethane ND 2.00 " <br /> Etitvlene dibromide ND 2.00 " <br /> Surrogate:7,2-DC444 50.7 50.0 101 60-140 <br /> LCS(1040011-BSI) - Prepared&Analyzed:04/02/01 <br /> Wyl.t,er.t-,b,utyI ether 52.4 2.00 ug/I 50.0 105 60-140 <br /> ge2-DC.4-d4 51.8 50.0 104 6I1-140 <br /> Matrix Spike(1040011-MSI) -- Source:5 10336 7-10 Prepared &Analyzed:04/02/01 <br /> Methyl tert-butyl ether 49.9 2.00 ug/l 50.0 ND 99.8 <br /> 60-140 �- <br /> Sur rogate:l,2-DC4-d4 49.9 50.0 99.8 60-140 <br /> Matrix Spike Dup(1040011-MSDI) Source: 5103367-10 Prepared&Analyzed.: 04/02/01 <br /> Methyl tert-butyl ether 54.8 2.00 ug/1 50.0 ND 110 60-140 9.36 25 <br /> ,Surrogate: 1,2-DCA44 52.1 50.0 104 60-140 - - <br /> Batch 1040030-EPA 5030B P/T <br /> Blank(1040030-BLKI) Prepared&Analyzed: 04/03/01 <br /> Tert-butyl alcohol ND 200 ug/1 <br /> Methyl tert-butyl ether ND 2.00 <br /> Di-isopropyl ether ND 2.00 " <br /> Ethyl tert-butyl ether ND 2.00 " <br /> Tert-amyl methyl ether ND 2.00 " <br /> Ethanol ND 3000 " <br /> 1,2-Dichloroethane ND 2,00 " <br /> Ethylene dibromide ND 2.00 " <br /> Surrogate: 1,2-DCA44 52.4 50.0 105 60-140 <br /> �equoia Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 10 of 12 <br /> � i <br />