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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 ). 

Where: 

## B.2.7 Coating and Painting Operations 

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) 

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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. 

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) 

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