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" 1 Sequoia 819 Striker Avenue,Suite 8 <br /> ® Sacramento,CA 95834 <br /> (916)921-9(500 <br /> Analytical FAX(916)921-0100 <br /> w—sequoialabs.com <br /> Delta Environmental COnsultants(Cameron Park) Project: ARCO 5469,Stockton,CA <br /> 3330 Cameron Park Dr. Project Number. NIA <br /> Cameron Park CA,95682Reported: <br /> Project Manager: Jay Johnson 41/08/01 10:32 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Analyte Reporting Spike Source %REC - <br /> RPD <br /> Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 0120193-EPA 5030B [P/T) - <br /> Blank(0120193-BLKI) _ Prepared&Analyzed: 12/15/00 <br /> Tert-butyl alcohol ND 200 ug/i — -- <br /> Methyl cert-butyl ether ND 2.00 " <br /> Di-isopropyl ether ND 2,00 " <br /> Ethyl tert-buty]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-DC-4-d4 52.6 „ <br /> 50.0 105 60-140 <br /> LCS(0120193-BSI)--- — Prepared&Analyzed: 12/15/00 <br /> Methyl tert-butyl ether 55.0 2.00 ug/l 50.0 <br /> 110 70-130 <br /> +, <br /> ogate: 1,2-DCA-d4 54.2 _ <br /> 50.0 108 60-140 <br /> Matrix Spike(0120193-MS1) Source: 5012075-01 Prepared&Analyzed: 12/15/00 <br /> Methyl tert-butyl ether 55.6 2.00 u l 50.0 -- <br /> ND 11I 60-140 <br /> Surrogate: 1,2-DCA-d4 <br /> 50,0 106 60-140 <br /> Matrix_ Spike Dup(0120193-MSDI) -- Source: 5012075-01 Prepared&Analyzed: 12/15/00 <br /> Methyl tert-butyl ether 53.2 2.00 ug/l g0.0 ND <br /> 105 60140 4.41 25 <br /> Surrogate: 1,2-DCA-d4 54.0 <br /> 50.0 108 60-140 —' <br /> Batch 0120197-EPA 5030B [PIT <br /> Blank(0120 -ELK1) .— Prepared&Analyzed: 12/17/00 <br /> Teri-butyl alcoholhol ND 200 ugtl <br /> Mcthyl 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-DCA-d4 49.8 - <br /> 50.0 99.6 60-140 <br /> �uoia Analytical-Sacramento <br /> 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 entirely. <br /> Page 10 of 14 <br />