Environmental Engineering Reference
In-Depth Information
1. Tank lot
• Verify that access to tank location is locked, if possible.
• Verify condition of fence.
• Verify that surface water is diverted around tank.
• Verify that there is no problem with erosion around the tank
foundation, drain, and overflow.
• Verify condition of the tank lot upkeep.
2. Water quality protection
• Exterior and interior steel/concrete are watertight.
• Vent is shielded and screened against animals and rain.
• Drain is protected and screened to prevent access by animals
and surface water.
• Overlow is protected and screened to prevent access by animals
and surface water.
• Roof hatch is watertight.
• Sidewall access is watertight.
• Accesses are locked and/or bolted.
• All other tank openings are curbed, sleeved, and covered to pre-
vent access by animals, surface water, or rain.
3. Tank operational controls
• Tank level indicator is operable and accurate.
• Water level controls, such as altitude valve and other valves, are
working properly.
• Telemetry system are operational.
• Tank water level recorder is operational.
4. Coating systems and corrosion control (interior and exterior)
• Inspect and note cracks and peeling of coating systems.
• Inspect and note location of rust on metal tanks.
• Inspect and note pits in tank metal.
• Inspect and note condition of cathodic protection system.
Note:
A detailed inspection of the coating system should be performed by
qualified persons in accordance with American Water Works Association
(AWWA) Standard D101-53. The annual inspection helps to determine
when a detailed inspection of the coating system is needed.
