Where:
HCl2010 = HCl emissions in 2010, megagrams per year (Mg/yr)
BRHClEL = Butyl rubber HCl emission limit, Mg HCl emissions/Mg butyl rubber produced
P2010 = Total elastomer product leaving the stripper in 2010, Mg/yr
1.74 = variability factor, unitless
40 C.F.R. §63.485