Joy dish soap cuts diesel.
Baking soda is one of many degreasers used by yards for this not uncommon event. BTW I put red duct tape on my fuel fills after each fill up. If I went a step further I'd put blue on the water fills.
Please don't ask how it got there.
I'd send a sample to a lab for testing
Please don't ask how it got there Maybe 20l diesel in a 100l tank with 50 liters water. .Will be pumping the tank out tomorrow into drums but need advice on how to clean the Stainless Steel tank to remove any residue and smell.
On aircraft carriers we use Dawn by the 55 gallon drum to degrease/deoil tanks in preps for painting. We have tested every product on the market in the lab, and Dawn is the best. Barry
Not sure which is worse, if any. Diesel in water tank, or, water in diesel tank! Dealing with latter now myself.
I remember when diesel cars first hit and the mistakes and, of course, before that you had lead and no lead I think. The one thing I learned from the diesel cars though was very clear labeling including caps. In addition to spacing make people look and think one more time. I know a situation last fall at a marina where they put 100+ gallons of gas in a diesel tank.
One of the reasons most fuel docks (at least in the USA) hand you the nozzle rather than doing it themselves is, that way it's you who makes this mistake, not them.
We have had people pump gas into their rod holders at my marina more than once.
My fuel fills are far from my water and waste tank fittings. I did once add water to the waste tank by mistake but that's not a big deal.