When Andrew Gunia established A Advanced Septic & Construction Services in 2006, he built a business based primarily on drainfield rejuvenation instead of pumping septic tanks and installing septic systems.“Our industry was way too quick to decide that a 20-year-old system, for instance, needed to be replaced,” explains Gunia, 55, who owns the Sumner, Washington-based company with his sons, Joshua, 34, and Jeremiah, 33.“In a previous job, I saw that homeowners often didn’t need a new drainfield, but I felt that no one was taking time to figure out what was needed,” he continues. “There was a piece missing in
