1.47 BMP C253 - Portable Sediment Tank
A portable sediment tank is used during construction to remove sediment from runoff originating from disturbed areas of the site. Sediment-laden water is pumped into the tank where sediment settles. Portable sediment tanks are often known by their proprietary name: Baker Tank or Rain for Rent Tanks.
Sediment tanks shall be placed on level, even ground.
Sediment tanks can be used where space is limited.
1.47.3 Design and Installation Specifications
Sediment tanks shall be a minimum of 2 feet deep.
Sediment tanks shall have an emergency overflow that directs discharge to a safe, appropriate location. Show the emergency overflow discharge location on the TESC Plans.
The outlet riser or pipe should be a minimum 1.5 feet above the bottom to avoid discharging sediment-laden water.
Show the tank configuration, size, and location on the TESC Plans.
The minimum storage volume shall be calculated as follows:
Pump Discharge (GPM) * 16 = Cubic Feet of Storage
Any tank shape is acceptable as long as the minimum volume requirements is obtained.
Ensure tank is clearly marked showing level when cleanout is needed.
Follow manufacturer or vendor specifications for maintenance.
Inspect tank daily and during storm events to ensure tank does not need repair.
Clean out tank when 1/3 of original sediment capacity has been used. Dispose of sediment in accordance with local, state and federal regulations.