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Sequoia 819 Sinker Avenue Suite 8" <br /> Sacramento CA 9g834 <br /> (916)921-9600 <br /> Analytical www `916'921-0100 <br /> www sequoiafabs win <br /> Gettler-Ryan-Dublin Project Chevron 9-6258, Stockton,CA Sampled 4124100 <br /> 6747 Sierra Court,Ste J Project Number 386844 Received 4/26100 <br /> Dublin,CA 94568 Project Manager Deanna L Harding Reported 5110/00 <br /> Volatile Oxygenate Compounds by EPA Method $260A/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 0050037 Date Prepared 512100 Extraction Method _EPA 5030B IP/TI <br /> Blank 0050037-BLK1 <br /> Teri-butyl alcohol 5/2100 ND ug/I 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tett-butyl ether ND 200 <br /> Tert-amyl methyl ether ND to 200 <br /> Ethanol ND 3000 <br /> Surrogate 1,2-DCA-d4 500 580 600-140 116 <br /> Blank 0050037-BLK2 <br /> Tert-butyl alcohol 513/00 ND ug/I 200 <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 /> Surrogate 12-DCA-d4 500 624 600-140 125 <br /> L.CS 0050037-BS 1 <br /> Methyl tert-butyl ether 5/2100 500 514 ug/I 700-130 103 <br /> Surrogate 1.2-DCA-d4 500 568 600-140 114 <br /> Matrix Spike 0050037-MSI S004320-01 <br /> Methyl tert-butyl ether 512100 500 143 744 ug/l 600-140 120 <br /> Surrogate 1,2-DCA-d4 It 500 616 No 600-140 123 <br /> Matrix Spike Dup 0050037-MSDI S004320-01 <br /> Methyl tert-butyl ether 512/00 500 143 724 ug/1 600-140 116 25 0 339 <br /> Surrogate 1,2-DCA-d4 500 590 of 600-140 118 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> ,pa, Page 7 of 9 <br />