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er <br /> te <br /> Sequoia $19Sacrkamento uCA 9W4 <br /> ITN (916)921-9600 <br /> rF <br /> Analytical FAX equo gabs2 1 co 0 <br /> www sequolalabs com <br /> SECOR International-Rancho Cordova Project Chevron 9-2396,Acampo,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 077 43485 150 Reported <br /> Rancho Cordova CA,95670 Project Manager Roger Hoffmore 05/16/01 15 46 <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 Limv Notes <br /> Batch 1050061 - EPA 5030B [MeOHJ <br /> Blank(1050061-BLKI) Prepared&Analyzed 05/04/01 <br /> Ten-butyl alcohol ND 100 mg/kg <br /> Methyl tert-butyl ether ND 0 100 " <br /> Di-isopropyl ether ND 0 100 " <br /> Ethyl tert-butyl ether ND 0 l00 " <br /> Tert-amyl methyl ether ND 0 100 " <br /> Ethanol ND 150 " <br /> 1,2-Dichlomethane ND 0100 " <br /> Ethylene dibromide ND 0 100 " <br /> Surrogate 1,2-DCA-d4 253 250 101 60-140 <br /> LCS(1050061-BSI) Prepared&Analyzed 05/04/01 <br /> ts1 tert-butyl ether 2 51 0 100 mg/kg 250 100 60-140 <br /> ate 12-DCA-d4 259 11 150 104 60-140 <br /> Matrix Spike(1050061-MS1) Source 5104412-15 Prepared&Analyzed 05/04/01 <br /> Methyl tert-butyl ether 2 52 0 100 mg/kg 250 ND 986 60-140 <br /> Surrogate 12-DCA-d4 252 250 101 60-140 <br /> Matrix Spike Dup(1050061-MSDI) Source 5104412-15 Prepared&Analyzed 05/04/01 <br /> Methyl tert-butyl ether 240 0 100 mg/kg 250 ND 938 60-140 488 25 <br /> Surrogate 1,2-DCA-d4 244 250 976 60-140 <br /> 'ola 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 he reproduced in its entirety <br /> Page 8 of 10 <br />