please help me

Hi, I am relatively new to plumbing, and I am simply wondering it the design in the picture below is acceptable in terms of venting and wet venting? I am renovating an old basement half bathroom. The drain for the sink is already taken care of, but I am just not sure about the drainage and...

What is the best way to retrieve a broken piece of well pipe inside of the well? I have paid 3 well companies to come "fish" for it and they can't get it. There is no cable anymore at the top. It broke off. Its between 150 to 250 foot down and sits in a 4in casing. They said that I would have...