On Thanksgiving morning the East Clarifier was showing reduced flow. The valves were isolated to the clarifier and the bottom of the unit was cleaned out of rags and grit.
Upon returning the clarifier to service it was determined that a valve on the East Aeration Basin that was closed failed to open. It appears as the gate stayed in the closed position when the valve stem came up.
With the reduced flow from the East Aeration Basin the level went higher than the level in the West Aeration Basin.
In an effort to balance the levels in the two Aeration Basins two pumps were brought in and placed in the East Aeration Basin to pump the level down to balance out the system.
The operating staff along with an outside contractor worked until the plant appeared to be operating in a balanced condition.
Sometime during the early hours of Friday morning the (approximately 3 AM) there was an increase in flow to the plant or a blockage to the pump and the East Aeration Basin overflowed the top of the chamber. The spill was immediately cleaned up Friday Morning by vacuuming and washing down the area of the Aeration Basin and the Plant driveway. TCEQ was notified of the incident.
In order to maintain control of the level in the East Aeration Basin a larger pump was installed along with a stand by pump in the event of a failure of the operating pump. Cameras monitoring the Flow off the pump and Aeration Basin Level were installed and connected via WIFI so the plant operating staff can monitor them.
The contractor selected for the overhaul was notified of the situation and was requested to start immediately to speed up their scheduled start date. Plans are in place to get going a month earlier.
The Wastewater Plant is in a precarious position. We are trying to keep the system working under the present conditions while expediting the repair schedule. Any reduction in flow to the plant will help. Conserve and reduce water usage in your home where possible.