Modelling Propane Use in RNG from LFG Pathway

Hello,

I'm looking to model propane use for a facility that produces RNG from an LFG feedstock.
I'm not seeing a propane input, so I am thinking of using the LPG (NG) input on the "Alt Fuel Prod" tab as a proxy.

Would this be a reasonable way of modelling propane use? I see that the energy parameters assumed for the LPG are fairly close to those of propane, does the model assume a mostly propane mix for the LPG?

Thanks,
PR