Miles Flansburg wrote:What do you need help with?
Also i am not shure how to make the basins for the filter.
It would definetly need to be half-watercylce and not full-watercycle,
to prevent contamination of the ground.
If i use gley, the gley layer might accumulate some heavy metals and radioactives over time,
but the glay layer can be taken out and its organic matter then separated from the the toxins.
So by using gley, regular maintenance is a must.
However plastic/concrete/metal might be safer from seepage,
but became an pollutant at the end of its lifetime plus those materials
could also pollute the environment during their lifetime.
Probably best would be basins made of monolithic rocks that had been carved out,
but aquiring them in the desired volume would make me sad about the mountain it used to be.