F = wind frequency factor [0.75 to 1.00],
L = land use factor [0.5 to 1.00],
T = topography factor [0.8 to 1.00],
V = orientation and shape factor [1.00 to 1.15],
E = building odor emission, N x P x B, OU/s,
N = number of pigs,
P = odor emission factor, OU/s-pig, [1 to 15],
B = building design and management factor, M-D,
M = manure removal frequency [0.50 to 1.00],
D = manure dilution factor [0.00 to 0.20],
S = odor emission from outdoor storage, C x G, OU/s,
C = odor emission factor for outside liquid manure storage, 50 OU/s-AU
G = animal unit, AU=1,100 lb of pig weight.
AE = odor abatement factor for buildings [0.30 to 1.00],
AS = odor abatement factor for outside liquid manure storage [0.30
to1.00]
(Thanks to investigator Hugh Henry for bringing this to our attention).