CPR TRAINING
One of OSHA's requirements for establishing "competent person" certification for trenching is knowing how to administer CPR on a job-site. You can send your techs to the RED CROSS for individual training, but it's easier and cheaper to have a certified instructor come to your shop and give a class. On any excavation, OSHA requires a "competent person" to be present.

MAPPING CLASS
If you are located in a large metropolitan area that requires a technician to look up customer addresses, you would be wise to give a class. I have had technicians spend an hour trying to find an address that was in the neighborhood. You can't afford to waste that much time in the busy season. Make sure your techs are familiar with the main arterial roads in your area. Show them short-cuts to bypass traffic slow-downs. This is a great class for your dispatchers too. I once questioned a dispatcher why a particular tech was sent across town for a call when we had someone near the job already. The response was: " It's not that far, look at the map, it's only an inch from his last call". That "inch" was through the heart of downtown during rush hour traffic. In L.A. traffic is a major time factor. That "inch" was a seven-mile drive through a construction zone and took 90 minutes. As these small dispatching mis-calculations accumulate, you could go broke and create unnecessary complaints from customers. Dispatching is a serious job that cannot be over emphasized. Be very careful about whom you give that responsibility to—it's like handing someone your checkbook.