You must calculate and report the annual process CO2 emissions from each wet-process phosphoric acid process line using the procedures in either paragraph (a) or (b) of this section.
where:
Em = Annual CO2 mass emissions from a wet-process phosphoric acid process line m according to this Equation Z-1a (metric tons).
ICn,i = Inorganic carbon content of a grab sample batch of phosphate rock by origin i obtained during month n, from the carbon analysis results (percent by weight, expressed as a decimal fraction).
Pn,i = Mass of phosphate rock by origin i consumed in month n by wet-process phosphoric acid process line m (tons).
z = Number of months during which the process line m operates.
b = Number of different types of phosphate rock in month, by origin. If the grab sample is a composite sample of rock from more than one origin, b = 1.
2000/2205 = Conversion factor to convert tons to metric tons.
44/12 = Ratio of molecular weights, CO2 to carbon.
where:
Em = Annual CO2 mass emissions from a wet-process phosphoric acid process line m according to this Equation Z-1b (metric tons).
CO2n,i = Carbon dioxide content of a grab sample batch of phosphate rock by origin i obtained during month n (percent by weight, expressed as a decimal fraction).
Pn,i = Mass of phosphate rock by origin i consumed in month n by wet-process phosphoric acid process line m (tons).
z = Number of months during which the process line m operates.
b = Number of different types of phosphate rock in month, by origin. If the grab sample is a composite sample of rock from more than one origin, b = 1.
2000/2205 = Conversion factor to convert tons to metric tons.
Where:
CO2 = Annual process CO2 emissions from phosphoric acid production facility (metric tons/year).
Em = Annual process CO2 emissions from wet-process phosphoric acid process line m (metric tons/year).
p = Number of wet-process phosphoric acid process lines.
40 C.F.R. §98.263