Is there someone who says to me what is this?

As you know I've just started to study how my town's administration works. So I went to the "Albo Pretorio Online", the place where every important thing is published, and I started to read.

I found this document (you can find the PDF at this link) attached to the publication number 413/2014:

In these days we are a little bit worried about public water so I tried to go in deep, I was unable to understand what this document means. Maybe my Italian is not so good, is there someone who says to me what is this? Thank you in advance.