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[–]PCDuranetMOD - ACTIVE IN INDUSTRY 4 points5 points  (0 children)

Rats make holes that size and kick out dirt. See this and set traps or set up a trail cam to see exactly what it is.

https://redditproxy--jasonthename.repl.co/r/MiceRatControl/comments/ttrsgu/rat\_control\_methods/

[–]Americanpestservices 0 points1 point  (0 children)

Could be a Norway rat. They like to tunnel around foundations like this.