Read this:

http://www.uscgboating.org/safety/bo.../183-520-b.htm

and this:

http://www.uscgboating.org/safety/bo.../fuel/fuel.htm

and this:

http://www.uscgboating.org/safety/bo.../183-564-a.htm

You really need to read and understand the entire requirement.

My question: Is locating the fill in an area where it gets walked on
a fuel safety hazard? Are there any issues I need be concered with
by putting this deck fill in an open deck area?

Appreciate any advice.