He probably still has a meth lab in the basement of his Mallison Falls building. Located in a semi-secret room beneath the basement bathroom, accessible through a large metal door in the floor.

Also, on the top floor of the main Mallison Falls building, he is growing Coca plants. He likely has a small processing operation for them to fuel his cocaine habit.

I know he violates the labor laws like crazy. His building is full of blind spots and security issues. None of the stuff he stores there is protected from environmental hazards. And I've seen workers rifle through stored shit time and time again.