It was past time to replace the aging onsite system at an assisted living facility in Auburn, Michigan. The building had been constructed as a grade school. The original system was pressure distribution on demand, says Joel Kwiatkowski, a registered sanitarian and the sewage treatment and water supply coordinator for the Bay County Health Department.The old system had a drainfield made of bottomless concrete infiltration chambers, with pipes inside it and stone around the pipes. “And they collapse, and then the pipes plug up. And it’s an old, old system. I don’t even have plans on it.” The county’s oldest
