On July 3, 2018, the EPA was notified that multiple ground squirrel carcasses were found
in the Main Tank (2 million gallons, ST0l) during a scheduled tank cleaning and inspection in
September 2017. The squirrels were immediately removed, but the tank was not drained and
cleaned. The most likely pathway for the squirrels to enter the tank was identified as the
overflow pipe. This pipe was located at ground level until March 2017 at which time it was
modified to raise the outflow to 12-24 inches above ground.