For example, a 100-gallon tank holds 80 gallons of propane. In addition to size ... charge around $100 to $200 for this pad for a small vertical tank and $300 to $500 for a larger tank.

JPS currently has 10 propane-fueled buses. Five were purchased in October 2014, and five more were purchased in April this year. The buses have 100-gallon extended range tanks, Ruddell said.