The seller provided the Radon Contractor and went with the cheapest bid. The buyer ended up paying for the system to be properly installed which included replacing the pvc outside the house as well.
Improperly vented radon system.
The pipe and fittings which were used were also not the required thickness.
Improperly installed electrical.The Radon contractor had put the electrical disconnect on the inside of the house and sleeved house wire (Romex) from the basement outside into the fan. A child could have easily pulled the raceway from the house and exposed the unprotected wires.
The electrical disconnect which needed to be outside the house.
The ground wires improperly connected together as well.