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819 Striker Avenue Suite 8 <br /> S e qu o l a Sacramento CA 95834 <br /> (916)921-9600 <br /> AFAX 921-atop <br /> Analytical <br /> www sequoquoialabs com <br /> SECOR International-Rancho Cordova Project Former Chevron 9-8632,Tracy,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 077 43506 150 Reported <br /> Rancho Cordova CA,95670 Project Manager Bill Brasher 06/15/01 13 39 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD I tmit Notes <br /> Batch 1050344- EPA 5030B JP/Tl <br /> Blank(1050344-BLKI) Prepared&Analyzed 05/30/01 <br /> Tert-butyl alcohol ND 200 ug/l <br /> Methyl tent-butyl ether ND 20 " <br /> Di-tsopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Ethanol ND 3000 " <br /> 1 2-Dichloroethane ND 20 " <br /> Ethylene dibromide ND 20 " <br /> Surrogate 1 2-DCA-d4 492 500 984 60-140 <br /> LCS(3050344-BSI) Prepared&Analyzed 05/30/01 <br /> W'lteirl-butyl ether 481 20 ug/I 500 962 60-140 <br /> te 1,2-DCA-d4 516 500 103 60-140 <br /> Matrix Spike(1050344-MSI) Source 5105308-04 Prepared&Analyzed 05/30/01 <br /> Methyl tert-butyl ether 471 20 ug/l 500 ND 942 60-140 <br /> Surrogate 1 2-DCA-d4 503 " -500 101 60-140 <br /> Matrix Spike Dup(1050344-MSD1) Source 5105308-04 Prepared&Analyzed 05/30/01 <br /> Methyl cert-butyl ether 505 20 ug/! 500 ND 101 60-140 697 25 <br /> Surrogate 1 2-DCA-d4 519 500 104 60-140 <br /> Batch 1060013-EPA 5030B IMeOHI <br /> Blank(1060013-BLKI) Prepared&Analyzed 06/04/01 <br /> Tert-butyl alcohol ND 10 mglkg <br /> Methyl tert-butyl ether ND 0 10 " <br /> Do-isopropyl ether ND 0 10 " <br /> Ethyl tort-butyl ether ND 0 10 <br /> Tert-amyl methyl ether ND 0 10 " <br /> Ethanol ND 150 " <br /> 1,2-Dichloroethane ND 0 10 " <br /> Ethylene dibromtde ND 4 10 <br /> Surrogate 1 2-DCA-d4 234 250 936 60-140 <br /> Viola Analytical-Sacramento <br /> The results in this report apply to the samples analyzed in accordance with the charas of <br /> custod} document This analytical report must he reproduced in its entirety <br /> Page 9 of 15 <br />