"Honey" pots were placed under the hopper chutes for private cars and Pullmans alike. Gray water just ran onto the track.

Special buckets...placed with care under the chutes. Some had an offset chute so they could fit alongside the truck frames or other underbody equipment. Others had wire handles...some stood on the ends of the ties. Somewhere in the terminal would be a "honey house" where these buckets were dumped and rinsed out.

For long-term parking you would see canvas sheets hung on hooks around the ends of the car to keep down odors and flies (you see this in photos of cars parked in FLA for example).

As an example of an extreme situation...imagine a 14-4 lightweight car with a hopper in every accomondation. If one of these were to lay over at a terminal on standby there would need to be a bucket under every chute!

What did New Orleans Union Passenger terminal and Amtrak do with occupied parked Heritage sleepers on the transcontinental services while parked in New Orleans or Kansas City, and on the Executive Sleeper while parked in Penn Station, New York? I did ride the Executive Sleeper a few times, and don't remember any warning from the porter.

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One interesting note was the high-level cars that AT&SF had. Those cars were built with holding tanks that "emptied themselves" once the train had reached a certain speed. Maybe you can remember thinking "these cars stink" when you saw them in service. Imagine the cloud of waste being vaporized when the big tanks dumped at speed. Nasty.

T7