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al i <br /> 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> 4D (916)921-9600 <br /> 100 <br /> Analytical F W sequo)92 s corn <br /> WWW sequoia[abs corn <br /> SECOR International-Rancho Cordova P-Ject ARCO 595, Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 595,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/30/02 14 12 <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 2070204-EPA 5030B [P/TJ <br /> Blank(2070204-BLKI) Prepared&Analyzed 07/23/02 <br /> 1,2-Dibromoethane(EDB) ND 050 ug/1 <br /> 1,2-Dichloroethane ND 050 " <br /> Tert-butyl alcohol ND 50 " <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> Surrogate 1 2-DCA-d4 246 250 98 60-140 <br /> LCS(2070204-BS1) Prepared&Analyzed 07/23/02 <br /> Methyl tert-butyl ether 233 050 u9/1 21 8 107 60-140 <br /> K <br /> rrogate 1 2-DCA-d4 241 25 0 96 60-140 <br /> atrix Spike(2070204-MSI) Source S207249-04 Prepared&Analyzed 07/23/02 <br /> Methyl tert-butyl ether 203 050 119/1 218 12 88 60-140 <br /> Surrogate 1 2-DCA-d4 206 " 250 82 60-140 <br /> Matru_t Spike Dup(2070204-MSDI) Source 5207249-04 Prepared&Analyzed 07/23/02 <br /> Methyl tert-butyl ether 246 050 ug/1 218 12 107 60-140 19 25 <br /> Surrogate 1 2-DCA-d4 235 250 94 60-140 <br /> Batch 2070232-EPA 5030B [PIT] <br /> Blank(2070232-BLKI) Prepared&Analyzed 07/24/02 <br /> I,2-Dtbromoethane(EDB) ND 050 ug/I <br /> 1,2-Dichloroethane ND 050 " <br /> Tert-butyl alcohol ND 50 " <br /> Methyl cert-butyl ether ND 050 " <br /> Dt-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 <br /> Ethanol ND 50 " <br /> Surrogate 12-DCA-d4 270 250 108 60-140 <br /> quota 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 to its entirety <br /> Page Page 14 of 16 <br />