QnA SAM.docx

Q: the required btu mix downstream of the propane mixing plant?

Q: the average number of gallons required per refueling?

A: “The MAFB will want HD5 Propane which is a minimum of 90%+ propane, a maximum of 5% propylene, and no more than 5% other gases (iso-butane, butane, methane, etc.).

100% propane can still be called HD 5 grade propane ... It's the highest commercially available propane grade delivery, what you would expect to be delivered in most residential and commercial environments like the base.

It would be good to understand if the supplier feel like there is any aspect of moisture in the propane that would benefit from adding methanol at the time of delivery. We have a methanol injector and can bring it up during the next pamp run in order to inject a little bit of methanol at the same time.

It's a good preventive maintenance measure to assure that any moisture that gets introduced with new propane gets adsorbed into the methanol and does not cause winter freezing problems in valves/strainers/pumps that has happened at other Northern climate locations.

The supplier should have a bill of lading on where they picked up the propane from (a propane pipeline or storage terminal or oil refinery and NOT an oil field LPG removal skid). that identifies it as HD 5 grade propane.

Again, there is no hard science associated with how much methanol is required so without specific knowledge of the HD5 Propane or supplier guidance otherwise, we have a rule of thumb of adding 2.5 gallons methanol per 10,000 gallons.”

A: “There is no estimate it will depend on the weather and how much the base needs.”