There can be some pretty nasty stuff coming off carpets and I think this guy knows that. He seems to be too lazy to look for a sanitary dump site like someone pointed out. It is people like this that make this business tougher than it should be. Not sure that signs do a lot to stop it. Security cameras might help identify culprits. Since it is almost impossible to stop this has anyone here offered a reward to customers that report dumping like this? Maybe it might give guys like this something to think about before they dump their tanks into the wash.