First of all, for the station, you're looking at between $1 million and $1.3 million in terms of what we've done with Strathmore and some of our stations in the U.S. In terms of the mobile refueller, I'd have to get back to you on the specific costs because we're looking at some patents on that.
Again, it's one of the first in terms of innovation on that side. In terms of some of the little units, we just opened up our first LNG Tango unit. It's about 14 million dollars. It will service the transportation sector down in Louisiana. Those are the hard costs for supporting the infrastructure for transportation.
The other element we're starting to see is that you can rail or truck LNG to any stop to provide that kind of infrastructure. What's occurring are those triangles for return-to-base. Even though those base triangles may be thousands of kilometres long, there are points at which you can look at refuelling. One heavy tractor-trailer will go between 800 and 1,000 kilometres. Those are the triangles we're starting to build.
In terms of the costs coming down, we see some real innovation. We're looking at a design of a station unit that you can put in any existing service station and look at CNG. We don't have the complete engineering on that—we're going for patents on it—but it will be very innovative at a fraction of the cost of doing a new station.