Ok so i got bored, and have been curious about the septic tank.... it's Not backing up or anything but wanted to figure out where it is and such because after tearing off the additions on the back of the house some of the pipe was above ground..also figured it would be better to find the hatch when the ground isn't frozen solid in case it needs to be pumped.... After deciding that a back hoe was in order my back, along with a shovel and hoe got to work.... After much digging I found the tank cover about 2 feet under ground.. the nut to the cover came of pretty easy with some pb blaster. .. come to find out it is a metal tank, the inlet baffel looks solid ld is solid etc. But not sure what I can tell about the actual tank condition with it full .... Code has no record of it being installed, but that's not a surprise cause codes only been in this town since the late 90s...