You folks do know, that there are fuel filters on all station pumps, right? I do believe there are laws regulations on how often these pump filters have to be changed at all stations. You`re more likely to contaminate your own fuel much worse and faster before any filling station does.
I think people worry to much about fill-up`s during fuel dumps. So with saying that... everybody says buy your fuel at the place that sells the most fuel per day, your fuel will be fresher. Ok, so hows that work when they are filling the in ground tanks everyday but yet some of you tell people not to buy fuel when they are dumping fuel. Just makes no sense telling people not to buy fuel while its getting delivered. That`s like damned if you do damned if you dont.
Stop worrying about when the tanker trucks dump the fuel. Your worrying about much of nothing. Its filtered when its coming out of the station pumps! And you have filters on your trucks, tractors, cars.
Whenever i had fuel delivered, it was company policy to climb up on top the tankers and make sure all the fuel had been emptied completely... and guess what, every tanker i ever looked down inside of, clean and shiny, not a spec of water, or dirt, or any kind of debris inside those tankers.
The biggest concern i`ve always seen in my years of gas station employment, gas and diesel fuel being accidentally getting unloaded in the wrong tanks. Two ways that can happen (and does all the time), depot screwed up during loading the tankers, and the other one is, the delivery truck driver stuck the hose in the wrong filling hole at the gas station.
Other than that, there are much worse concerns to worry about than when tankers dump the fuel.