Refueling trailer fuel quality question

[TRC]

I seem to recall that Avgas should be laboratory tested after 3 months, and Jet fuel after 6 months.
This assumes that it has been un-touched for these periods, I.E. No new fuel has been added, and the fuel passes all the usual quality checks.

CAP748 Might have the correct information - I'm writing this from memory. Any aviation fuel supplier will be able to tell you of course.

Plastic containers are not the right material for storage btw, unless they have been designed for the purpose - which I doubt.

EDIT

CAP748 Chapter 4, Para 1.3 (c):

"c) whenever laboratory testing is required e.g. when Jet A-1 has been stored and not added to for a period of six months or when aviation gasoline AVGAS has been stored and not added to for a period of three months."