Running a pumping, portable sanitation and septic system installation business in the heart of Minnesota, Greg Posch has a lot of downtime between Christmas and the spring thaw. On most days during the frigid winter, Posch trades the pumping wand for a welding torch.The seasonal workload at Posch’s family business, Tri-County Septic LLC in Holdingford, Minn., has been well established since he put his first vacuum truck on the road 21 years ago. In the summer, Posch, 52, and his son, Keith, pump about 1,000 tanks, usually residential and often involving onsite systems and holding tanks at vacation lake properties.
