Water splash out of place (residue processing)

Here is a screenshot of it:
https://steamcommunity.com/sharedfiles/filedetails/?id=439561857

Notice the splash effect above the water where the barrel is.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.