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819 Striker Avenue Suite 8 <br /> y Sacramento CA 95834 <br /> Sequoia FAX(916)921 9600 <br /> Analytical �sequoialabs Torr, <br /> ATC Associates Inc -Modesto Project Diesel Pertormance Sampled 4/20/00 <br /> 1 1 17 Lone Palm Ave Ste B Project Number 54 62577 0001 Received 4/25100 <br /> Modesto Ca 95351 Project Manager Jeanne Homsey Reported 5/9100 <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 /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0040283 Date Prepared 4127/00 _Extraction Method EPA 5030B IPIT1 <br /> Blank 0040283-BLKI <br /> Tert-butyl alcohol 4/27100 ND ug/l 200 <br /> Methvl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl ter-butyl ether ND 200 <br /> Tert-amyl methyl ether ND " 200 <br /> Ethanol ND 3000 <br /> Surrogate 12-DCA-d4 500 574 600-140 115 <br /> Blank 0040283-B LK2 <br /> Tert-butyl alcohol 4/28100 ND ug/1 200 <br /> Methyl tent-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> thyl tert-butyl ether ND 200 <br /> ert-amyl methyl ether ND 200 <br /> Ethanol ND 3000 <br /> Surrogate 12-DCA-d4 500 604 600-140 121 <br /> LCS 0040283-BSI <br /> Methyl tert-butyl ether 4/27/00 500 50 4 ug/1 700-130 101 �I <br /> Surrogate 12-DCA-d4 500 612 600-140 122 <br /> r <br /> LCS Dup 0040283-BSD1 <br /> Methyl tert-butyl ether 4127/00 500 484 ug/1 700-130 968 25 0 425 <br /> Surrogate 12-DCA-d4 500 60 6 600-140 121 <br /> Matrix Spike 0040283-MSI 5004292-01 <br /> Methyl tent-butyl ether 4/27100 500 ND 504 ug/t 600-140 101 <br /> Surrogate 12-DCA-d4 500 640 600-140 128 <br /> Matrix Spike Dun 0040283-IVISDI S004292-01 <br /> Methyl tert-butyl ether 4/27/00 500 ND 478 ug/l 600-140 95 6 25 0 549 <br /> Surrogate 12-DCA-d4 500 618 600-140 124 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 7 of 8 <br />