Fuel storage and the handling of jet and diesel fuel does not produce significant HAP emissions  because these fuels have a relatively low vapor pressure and the emissions remain well confined  within the containment vessels and the distribution system. Howeve r, HAP emissions from  aviation gasoline and motor gasoline storage can be more significant as their vapor pressures are  higher than that of jet and diesel fuel.  To estimate HAP emissions from storage tanks, the data required include: (i) an estimate of the  standing storage and working THC emissions 60 , (ii) a THC-to-TOG conversion factor, and (iii) a  speciation profile.  The general methodology for calculating storage tank H AP emissions is expressed in  Equation  B-9  ( HAP Emissions - Fuel Storage Tanks ).  Emissions of VOC from coating and painting activities (use of enamel, primer, varnish,  adhesive, etc.) vary depending  on the type and the amount of materials used and the type of  emission control measure.  Equation B-10  ( HAP Emissions - Coating/Painting Operations )  provides the general method of calculating HAP emissions from these sources.  B.2.7  Coating and Painting Operations  Where:  I = Mass of HAP of interest, expressed in pounds (lbs)  Q = Quantity of coating/paint, expressed in gallons  R = VOC content, expressed in pounds of VOC per gallons (lbs VOC/gallons)  S = Air pollutant control factor, expressed as a percentage  F = VOC to TOG conversion factor (unitless)  H = Speciation profile for HAP of interest (mass fraction)  Where:  I = Mass of HAP of interest, expressed in pounds (lbs)  O = Standing storage THC emissions, expressed in pounds (lbs)  P = Working storage THC emissions, expressed in pounds (lbs)  F = THC to TOG conversion factor (unitless)  H = Speciation profile for HAP of interest (mass fraction)  Equation B-9. HAP Emissions - Fuel Storage Tanks  I = (O + P) x F x H  I = Q x R x S/100 x F x H  Equation B-10. HAP Emissions - Coating/Painting Operations  60 Estimates of standing storage and working HC emissions may be obtained from EDMS/AEDT, the EPA’s  TANKS program, and/or using methodologies described in  Section 7.1 of Volume I of Compilation of Air  Pollutant Emission Factors . Information specific to the type of tank (i.e., fixed or floating roof) may be  obtained from the airport operator, fueling contractor, or by visual inspection.  60$_{ }$ APPENDIX B$_{ }$