Running an automotive based business out of you home should get him a court ordered cease and desist letter from your homeowners and the city. "A document sent to an individual or business to stop purportedly illegal activity ("cease") and not to restart it ("desist"). The letter may warn that if the recipient does not discontinue specified conduct, or take certain actions, by deadlines set in the letter, that party may be sued".
If that didn't work just tell the police that he dumped his waste tank in the waste water culvert.
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