Most pumps I've used have label that says "may contain up to 20% bio fuels", it doesn't state exactly what percentage at that moment, but they will all be ULSD.
It's a good practice to use a diesel additive occasionally that contains lubricity, bacteriacide, maybe cetane, to also absorb moisture from condensation, Diesel Kleen, Howes, Lucas to name few.
Danny & Linda
Sold our '13 Thor Redwood 36 FB
Currently RV & truckless