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819 Stnker Avenue Suite 8 <br /> 1 Sequoia Sacramento CA 95834 <br /> (9 16)921-96(10 <br /> Analytical FAX equo alabs921 c 00 <br /> www sequolatabs corn <br /> I1 <br /> aine Tech Services,Inc Project Equiva,7910 Lower Sacramento Rd, Stockton,CA <br /> 1680 Rogers Avenue Project Number 0010223-L2 Reported <br /> San Jose CA,95112-1105 Project Manager Nick Sudano 03/09/01 16 27 <br /> MTBE Confirmation 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 1030073-EPA 5030B PIT <br /> I <br /> Blank(1030073-BLKI) Prepared&Analyzed 03/07/01 <br /> Methyl tert-butyl ether ND 200 ug/1 <br /> Surrogate 1,2-DCA-d4 510 500 102 60-140 <br /> I <br /> LCS(1030073-BS1) Prepared&Analyzed 03/07/01 <br /> Methyl tert-butyl ether 502 200 ug/1 500 100 70-130 <br /> Surrogate 12-DCA-d4 497 500 994 60-140 <br /> LCS Dup(1030073-BSDI) Prepared&Analyzed 03/07/01 <br /> Methyl cert-bury]ether 510 200 ug/1 500 102 70-130 158 25 <br /> Surrogate 1,2-DCA-d4 501 11500 100 60-140 <br /> Matrix Spike(1030073-MSI) Source S102341-09 Prepared&Analyzed 03/07/01 <br /> I tert-butyl ether 531 200 ug/1 Soo ND 106 60-140 <br /> ogate 12-DCA-d4 507 11500 101 60-140 <br /> Matrix Spike Dup(1030073-MSD1) Source 5102341-09 Prepared&Analyzed 03/07/01 <br /> Methyl tent-butyl ether 522 200 ug/1 500 ND 104 60-140 171 25 <br /> Surrogate 1 2-DCA-d4 492 500 984 60-140 <br /> uoia 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 5 of 6 <br />