I don't know for sure if anyone was buried there, but PJP Landfill in Jersey City NJ, is rumored to be where Hoffa is. Now I don't know if I believe he is there, as he disappeared hundreds of miles away from NJ. But the place was owned by a Genovese family associate or soldier, (not sure which), so I don't think it's a stretch to imagine it's a final resting place for mob guys. The place was on fire for literally years, so I don't think anyone will find anything.