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QC Batch #: 642 <br />Sample <br />Result (ug/kg) <br />ID <br />Compound <br />% <br />dibromofluoromethane (50) <br />MB <br />methyl tert-butyl ether (MTBE) <br />MB <br />di -isopropyl ether (DIPE) <br />MB <br />ethyl tert-butyl ether (ETBE) <br />MB <br />tert-amyl methyl ether (TAME) <br />• <br />Lab Project #: 9010601 <br />Result <br />(ug/kg) <br />ND <br />ND <br />ND <br />ND <br />Surrogate (ug/kg) <br />Result (ug/kg) <br />% Recovery <br />Acceptance Range (°b) <br />% <br />dibromofluoromethane (50) <br />55.5 <br />111 <br />70-130 <br />Sample Sample <br />Result (ug/kg) <br />Result <br />Spike <br />% <br /># ID <br />Compound <br />(ug/kg) <br />Level <br />Recv. <br />2835 CMS <br />methyl tert-butyl ether (MTBE) <br />55.1 <br />53 <br />104 <br />CMS <br />di -isopropyl ether (DIPE) <br />46.6 <br />53 <br />87.9 <br />CMS <br />ethyl tert-butyl ether (ETBE) <br />49.1 <br />52 <br />97.4 <br />CMS <br />tert-amyl methyl ether (TAME) <br />86.5 <br />96 <br />90.1 <br />Surrogate (ug/kg) <br />Result (ug/kg) <br />% Recovery <br />Acceptance Range (%) <br />dibromofluoromethane (55.2) <br />58.1 <br />105 <br />70-130 <br />Sample Sample <br />Result (ug/kg) <br />Result <br />Spike <br />% <br />54.9 <br /># ID <br />Compound <br />(ug/kg) <br />Level <br />Recv. <br />RPD <br />2835 CMSD <br />methyl tert-butyl ether (MTBE) <br />47.8 <br />53 <br />90.2 <br />14 <br />CMSD <br />di -isopropyl ether (DIPE) <br />47.9 <br />53 <br />90.4 <br />2.8 <br />CMSD <br />ethyl tert-butyl ether (ETBE) <br />45.3 <br />52 <br />87.1 <br />8.1 <br />CMSD <br />terl-amyl methyl ether (TAME) <br />78.8 <br />96 <br />82.1 <br />9.3 <br />Surrogate (ug/kg) <br />Result (ug/kg) <br />% Recovery <br />Acceptance Range (%) <br />dibromofluoromethane (55.2) <br />54.9 <br />99.5 <br />70 - 130 <br />MB = Method Blank; LCS = Laboratory Control Sample; CMS = Client Matrix Spike; CMSD = Client Matrix Spike Duplicate <br />NS = Not Spiked; OR = Over Calibration Range <br />Page 21 of 21 <br />CA Lab Accreditation #: 2118 / 1-2303 <br />