I does say that Don, having done a number of gas stations, i will say that we have installed more explosionproof than required.

We even did up the tank monitors as such, an intrisically safe system!

So in reality, this did cost more than it should have. The problem with doing gas stations in an area of 3 states is that many "powers that be" view the job, not all as savey as you with the NEC.

So it's a small price to pay to keep the peace. [Linked Image]