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d p <br /> ' 819 Striker Avenue Suite 8 <br /> 1 Sequoia Sacramento C 95834 <br /> (916)922 1-9600 <br /> FAX 921 <br /> Analytical www sequotslabs cam <br /> SECOR International-Rancho Cordova Project Chevron 9-2396,Acatnpo,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 45 <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 Limit Notes <br /> Batch 1050030-EPA 5030B [PIT] <br /> Blank(1050030-BLKI) Prepared&Analyzed 05/03/01 <br /> Tert-butyl alcohol ND 200 ug/I <br /> Methyl tert-butyl ether ND 200 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Ethanol ND 3000 " <br /> 1,2-Dichloroethane ND 200 " <br /> Ethylene dibromtde ND 200 " <br /> Surrogate 1 2-DCA-d4 513 500 103 60-140 <br /> LCS(1050030-BSI) Prepared&Analyzed 05/03/01 <br /> bdMvl tert-butyl ether 518 200 ugh 500 104 60-140 <br /> 3Wgate 1 2-DCA-d4 499 11500 998 60-140 <br /> Matrix Spike(1050030-MSI) Source 5105034-05 Prepared&Analyzed 05/03/01 <br /> Methyl tert-butyl ether 521 200 ugfl Soo ND 104 60-140 <br /> Surrogate 1 2-DCA-d4 508 500 102 60-140 <br /> Matrix Spike Dup(1050030-MSD1) Source 5105034-05 Prepared&Analyzed 05/03/01 <br /> Methyl tert-butyl ether 522 200 ug/l 500 ND 104 60-140 0 192 25 <br /> Surrogate 1 2-DCA-d4 538 500 108 60-140 <br /> Batch 1050061 -EPA 5030B [MeOH[ <br /> Blank(1050061-BLKI) Prepared&Analyzed 05/04/01 <br /> Tert-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 0 100 " <br /> Tert-amyl methyl ether ND 0 100 " <br /> Ethanol ND 150 " <br /> 1,2-Dichloroethane ND 0100 " <br /> Ethylene dibromtde ND 0 100 " <br /> Surrogate 1 2-DCA-d4 253 250 101 60-140 <br /> ota Analytical-Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced rn its entirety <br /> Page 12 of 16 <br />