When Johnny Cash sang “I walk the line,” he wasn’t referring to monitoring a line of 240 rural septic tanks.
But that is exactly what Larry Peterson does as Chelan County (Washington) Public Utility District treatment plant operator. The tanks contain 1,000 to 6,000 gallons and send graywater by pipeline to the Lake Wenatchee Wastewater Treatment Plant, west of Leavenworth.It’s part of his crusade to ensure the best-quality wastewater treatment in his jurisdiction. “There’s just over 10 miles of collection systems to be monitored,” says Peterson. “So it’s about 20 miles by the time I walk to the end and then
