I am looking for a site for a new house.
And I found somthing strainge thing on sewerage service diagram.
http://i.imgur.com/ntoWKcM.png
http://i.imgur.com/nrdvL0z.png
I dont have any idea of broken line in black circle in second image.
In my guess is that the brken line area is not permmited to build a house.
Is that true?