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6 Sequoia <br />� Analytical <br />819 Striker Avenue Suite 8 <br />Sacramento CA 95834 <br />(916)921-9600 <br />FAX (916) 921 -0 100 <br />www sequolalabs com <br />Settler -Ryan - Dublin <br />Project <br />Chevron 9-5775, Lodi , CA <br />Sampled <br />8/16/00 <br />1747 Sierra Court, Ste J <br />Project Number <br />101207 01 <br />Received <br />8/16/00 <br />)ublin CA 94568 <br />Project Manager <br />S Palston <br />Reported <br />8/17-18/00 <br />Volatile Oxygenate Compounds by EPA Method 8260A/Quality Control <br />Sequoia Analytical - Sacramento <br />Date Spike Sample QC Reporting Limit Recov RPD RPD <br />knalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes' <br />Batch 0080208 <br />Blank <br />Tert-butyl alcohol <br />Methyl tert-butyl ether <br />Di -isopropyl ether <br />Ethyl tert-butyl ether <br />Tert-amyl methyl ether <br />Ethanol <br />Surrogate 12 -DCA -d4 <br />Date Prepared 8/16/00 <br />0080208-BLK1 <br />8/16/00 <br />„ <br />500 <br />Extraction Method EPA 5030B PIT <br />ND ug/I <br />200 <br />ND <br />200 <br />ND <br />200 <br />ND <br />200 <br />ND <br />200 <br />ND <br />3000 <br />466 <br />600-140 93 <br />LCS <br />0080208-BS1 <br />0 568 <br />0 500 4 <br />ND <br />0 500 <br />ND <br />0 500 <br />tert-butyl ether <br />8/16/00 <br />500 <br />3000 <br />454 <br />ug/1 <br />70 0430 <br />908 <br />_Methyl <br />Surrogate 11 -DCA -d4 <br />of <br />500 <br />476 <br />600-140 <br />952 <br />40atrix <br />_Syike <br />0080208 -MSI <br />5008154-13 <br />Methyl tert-butyl ether <br />8/16/00 <br />500 <br />804 <br />129 <br />ug/l <br />600-140 <br />972 <br />Surrogate 11 -DCA -d4 <br />rF <br />SO 0 <br />476 <br />600-140 <br />952 <br />Matrix Spike Duo <br />0080208-MSD1 <br />5008154-13 <br />Methyl cert -butyl ether <br />8/16/00 <br />50 0 <br />804 <br />129 <br />ug/1 <br />600-140 <br />972 250 0 <br />Surrogate 12 -DCA -d4 <br />1150 <br />0 <br />48 0 <br />11600-140 <br />960 <br />Batch 0080209 Date Pre ared 8/16/00 <br />Blank 0080209-BLK1 <br />Tert-butyl alcohol 8/16/00 <br />Methyl tert-butyl ether " <br />Di -isopropyl ether " <br />Ethyl tert-butyl ether " <br />Tert-amyl methyl ether " <br />Ethanol " <br />Surrogate 11 -DCA -d4 <br />Blank <br />Tert-butyl alcohol <br />Methyl tert-butyl ether <br />Di -isopropyl ether <br />Ethyl tert-butyl ether <br />Tert-amyl methyl ether <br />Ethanol <br />Surrogate 11 -DCA -d4 <br />Su <br />11 100 <br />Extraction Method EPA 50305 IPITI <br />ND mg/ml Air <br />500 <br />0 568 <br />0 500 4 <br />ND <br />0 500 <br />ND <br />0 500 <br />ND <br />0 500 <br />ND <br />3000 <br />960 11600-140 960 <br />0080209-BLK2 <br />8/17/00 ND mg/ml Air 500 <br />ND 0 500 <br />" ND 0 500 <br />" ND 0 500 <br />ND 0 500 <br />" ND 3000 <br />100 980 600-140 980 <br />Sequoia Analytical - Sacramento *Refer to end of report for text of notes and definitions <br />Page 14 of 16 <br />