Consultation about TEA and LCA settings of boiler stream

Hello, may I ask you some questions about the TEA and LCA settings of boiler stream? Thanks for your help.

I use code ```CHP_sys = create_coheat_and_power_system(combustible_slurries=stream_a, combustible_gases= stream_b, mockup=True)``` to create boiler.

a) Could I consult you how to set the price of boiler inlet stream ```boiler_chemicals``` stream and boiler outlet stream ```ash``` stream, ```emissions``` stream, ```blowdown``` stream (no wastewater treatment process is built in my process)?
b) For boiler inlet stream ```boiler_chemicals``` stream and boiler outlet stream ```ash``` stream, ```emissions``` stream, ```blowdown``` stream (no wastewater treatment process is built in my process), could I consult you how to set the characterization factor of them when executing LCA?
c) Could I consult you why is the composition of boiler inlet stream ```boiler_chemicals``` stream ash?