([SIGMA]LdjDdj will be 0 if no VOC solvent is added to the coatings, as received.)
Where: n is the number of different coatings used during the calendar month and m is the number of different diluent VOC-solvents used during the calendar month.
Where: n is the number of different coatings used during the calendar month.
Select the appropriate transfer efficiency from table 1. If the owner or operator can demonstrate to the satisfaction of the Administrator that transfer efficiencies other than those shown are appropriate, the Administrator will approve their use on a case-by-case basis. Transfer efficiency values for application methods not listed below shall be determined by the Administrator on a case-by-case basis. An owner or operator must submit sufficient data for the Administrator to judge the accuracy of the transfer efficiency claims.
Table 1-Transfer Efficiencies
Application methods | Transfer efficiency (T) |
Air atomized spray | 0.25 |
Airless spray | .25 |
Manual electrostatic spray | .60 |
Nonrotational automatic electrostatic spray | .70 |
Rotating head electrostatic spray (manual and automatic) | .80 |
Dip coat and flow coat | .90 |
Electrodeposition | .95 |
Where more than one application method is used within a single surface coating operation, the owner or operator shall determine the composition and volume of each coating applied by each method through a means acceptable to the Administrator and compute the weighted average transfer efficiency by the following equation:
Where n is the number of coatings used and p is the number of application methods used.
N = G
Where
n is the number of gas streams entering the control device and
m is the number of gas streams emitted directly to the atmosphere.
Where:
n is the number of gas streams entering the control device, and
m is the number of gas streams leaving the contol device and entering the atmosphere.
R = EF
N = G(1-R)
Mr = Lr Dr
40 C.F.R. §60.313