darren epperson/san joaquin county sheriff's dept."it's the first one that i've personally heard of."sgt. darren epperson says pipes like these are scattered throughout the delta.it's one of the many dangers boaters can encounter.sgt. darren epperson/san joaquin county sheriff's dept.:"you can see it's an oddball man-made shape going up at an angle on the banks, so you know that's a pipe and it doesn't matter if the pipe is pushing water out or pulling it in. it's a danger to you either way, so you just need to stay away from it."jennifer mcgraw/stockton, ca: "the attorney tells me he doesn't know who the pipe belongs to, but people around here say they're often owned by individual farmers."douglas saeltzer/tovar family attorney: "right now we have more questions than answers."the tovar's can't understand why there's no protection around the pipes.sgt. darren epperson/san joaquin county sheriff's dept.: "the safeguards are for the system, not necessarily to stop people from going in, the only thing they have on the front of them is a