Table B-4. Example THC Estimate  Table B-5. Conversion Factors  Source: EPA and FAA,  Recommended Best Practice for Quantifying Speciated Organic Emissions from Aircraft Equipped with Turbofan,  Turbojet, and Turboprop Engines , May 27, 2009, http://www.epa.gov/otaq/regs/nonroad/aviation/420r09901.pdf  Note:  $^{1 }$For the purpose of reporting, application, and comparison, the units for the compounds in this  table are referenced as follows: THC measured as methane equivalent (following Procedures in the  Emissions Certification of Aircraft Engines, Annex 16, Volume II, International Civil Aviation  Organization, TOG as TOG, VOC as VOC, and NMOG as NMOG.  This conversion from THC to TOG emissions i s shown in  Equation B-3  ( Conversion to TOG  Emissions ).  Equation B-3. Conversion to TOG Emissions  TOG Emissions (kg)  = THC Emissions (kg) x THC to TOG Conversion Factor  THC to  TOG  VOC to  TOG  THC to  NMHC  THC to  VOC  NMOG to  TOG  TOG to  VOC  TOG to  NMHC  1.16  1.01  1.16  1.15  1.00  0.99  1.00  Fuel Flow Rate (per Engine)  Time  in  Mode  (min)  Fuel  Consumption  (kg)  THC  Emission  Indices  (g/kg of  Fuel)  Number of  THC  (kg)  Mode  Rate (kg/sec)  Engines  Operations  Takeoff  1.051  1.51  95.221  0.23  2  500  21.90  Climbout  0.862  0.53  27.412  0.23  2  500  6.30  Total  278  Source: EPA and FAA,  Recommended Best Practice for Quantifying Speciated Organic Gas Emissions from Aircraft  Equipped with Turbofan, Turbojet, and Turboprop Engines , May 27, 2009,  http://www.epa.gov/otaq/regs/nonroad/aviation/420r09901.pdf.  Unlike emissions from other transportation sources, international certification standards require  that HAP emissions from newly certified aircraft engines  be reported in units of methane  equivalency. Thus, for HAP emissions , the methane equivalency 57  is converted to TOG  according to the average molecular weight of the specific profile.  The factors for converting  THC to TOG, VOC to TOG and factors to/from the other groups of organic compounds (such as  Non-Methane Organic Gases - NMOG and Non-Methane Hydrocarbons - NMHC) are provided  in  Table B-5  ( Conversion Factors ).  APPENDIX B$_{ }$ 57  ICAO,  Procedures in the Emissions Certification of Aircraft Engines , Annex 16, Volume II,  www.icao.int.  55$_{ }$