Rockstar commented bout this a year ago on old gen cuz someone asked bout it on support rockstar said it was a sound they used for that area something with the pipes just some random sound effect no Easter egg you can believe it's some secret thing but if the creators of the game claim it's just some random sound then that's what it is
As to how I know they said it I've lived on support site since launch mainly trolling them but I remember the post had a video showing it remember it clearly cuz the noise scares the day lights out of me oddly