The dreaded concrete.......

[and that is not uncommon in Italy], your chances of getting the necessary approvals from the Commune will be remote   Good luck

Sorry I can't give you more practical advice and assistance, but the thought occured that maybe the right people to sell your geometra on the idea of a Sewage Treatment Plant are the (Italian) people who would sell it to you? Of course, this assumes the geometra is actually willing to listen to novel ideas. It also assumes that the geometra is not determined to give you a septic tank because it will be sold or installed by his brother/cousin/uncle, and that there's not an arrangement whereby he gets a nice cut of the price his clients are charged for septic tanks. How entangled are you with this character? If he's not willing to listen to your wishes on this point, how many other things you ask for is he going to ignore when it actually comes time for work to be done? Al

" the right people to sell your geometra on the idea of a Sewage Treatment Plant are the (Italian) people who would sell it to you"   Is it an italian company that makes the STP? - or were you buying in one from abroad

Hi Alan & Allan. Your assumptions are absolutely correct, I couln't agree more. I could say a lot more, but then the Admin may get involved. We were originally planning on taking a state-of-the-art German STP from the UK but decided against such a 'daft brit' idea. We have found an Italian company called Oppo. (www.oppo.it) and as you have suggested, we're going to ask them to try and sell the concept  to our geometra. Good luck to them, I'd say. #1