DOT and propane

I am facing the prospect of a career change. Maybe voluntarily....I can't take much more corporate bullsqueezin's.
As part of my plan B, I am looking at self employment...starting a mobile business. I have 2 possibilities I am considering and need advise on DOT requirements since both will require a trailer and moving either propane or refrigerants (liquid nitrogen). Yes, both are for food preparation. I might be doing both once I decide on a big leap to a store front.....then all of this is moot.
Back to DOT, My vehicles will be far below a GVWR of 26000 pounds....so, by weight I will not need a CDL. Nor will I be transporting 16 passengers. But I will be transporting one of two things....propane (100 pounds or less) or Liquid Nitrogen....I don't know the quantity...I am assuming 1500 pounds or less....I don't even know what size bottles are available for this yet.
It looks like for propane I'll be below hazmat, so for weight and hazmat I will not need a CDL. Can some one verify this?
Indiana doesn't specify liquid nitrogen in their CDL book....at least that I could find. Does anyone know about this? At what point does liquid nitrogen become hazmat, and require CDL?
Thanks in advance....I'd call the DOt myself, but it's Sunday...and this question is bugging me...I can't find a clear answer...
As part of my plan B, I am looking at self employment...starting a mobile business. I have 2 possibilities I am considering and need advise on DOT requirements since both will require a trailer and moving either propane or refrigerants (liquid nitrogen). Yes, both are for food preparation. I might be doing both once I decide on a big leap to a store front.....then all of this is moot.
Back to DOT, My vehicles will be far below a GVWR of 26000 pounds....so, by weight I will not need a CDL. Nor will I be transporting 16 passengers. But I will be transporting one of two things....propane (100 pounds or less) or Liquid Nitrogen....I don't know the quantity...I am assuming 1500 pounds or less....I don't even know what size bottles are available for this yet.
It looks like for propane I'll be below hazmat, so for weight and hazmat I will not need a CDL. Can some one verify this?
Indiana doesn't specify liquid nitrogen in their CDL book....at least that I could find. Does anyone know about this? At what point does liquid nitrogen become hazmat, and require CDL?
Thanks in advance....I'd call the DOt myself, but it's Sunday...and this question is bugging me...I can't find a clear answer...