We have a contractor that complains about everything. His newest complaint is that he is having carbon monoxide poisoning from our boom truck even though he is outside and atleast 10 feet from where the exhaust comes out of the vehicle. I definitely want to fix the problem if he really is getting carbon monoxide poisoning. The exhaust on our Mack EM6 truck is released from the bottom of the truck and the boom operating seat seat is on the top of the truck. If the exhaust was released from the top of the vehicle, would that cure the problem?... or make it worse? This is a picture of our truck.