"Graeme" wrote in message
...

Near here (Aberdeenshire), a fairly rough 1930s bungalow sold a while ago,
and was promptly demolished, to be replaced by a new detached house. Not
a rural site as such, although a rural location, but a road of similar
houses, mains drains and electricity.

Following completion of the house, a large hole was dug in the rear
garden, with a huge digger. Somewhere between 2x3 to 3x4 meters (I'm
nosing through the fence). The spoil was then sieved using the digger
bucket, the hole lined with plastic tarpaulins, and the stones from the
sieving put in the bottom. I missed what happened next, but the huge pile
of sieved spoil has gone, as has the hole BUT there are two corrugated
pipes protruding from the ex hole, with manhole type lids. There was a
trench from the house to the hole. I cannot think what could be in the
hole other than a septic tank, but why install a septic tank with mains
drainage outside, or what else could it be? Not enough time elapsed to
build a nuclear bunker!

One of ours buried a 40' shipping container and grew marihuana in it under
lights.