< Back to project list
|
|||||||||||
|
Scope of Work:
· The project consisted of the rehabilitation and modification of the Sludge – Drying beds at the Watervliet Arsenal’s water treatment facility. This design build project presented many challenges from the on-set. First the work had to be completed in phases due to the need for continual operation of the facility. Second, the beds, which were constructed in the 1940’s required many updates to come into compliance with current environmental standards.
· Waste sludge generated at this facility is placed into the drying bed which allows the liquids to “drain out”, from solids and solidify. Once dry, the solids were removed mechanically for disposal. The fall out liquids were collected then piped back to the treatment plant for final treatment.
· Prior to starting our construction effort the existing beds had to be emptied and cleaned of all hazardous materials. All loose and unstable concrete was removed and patched prior to the installation of a new liner and collection system.
· Upon completion of the patching, our crews continued with the construction of the dual containment liner and collection systems. All mechanical fill pipes had to be turned off and raised in elevation to allow for the placement of the final concrete wall cap.
· The containment liner consisted of three protective surfaces. A secondary HDPE liner, a primary HDPE liner and a 12" constructed concrete layer lining the entire tank structure.
· A 15” detection layer of sand was placed between the primary liner and the secondary liner. This allowed for continuous leak monitoring through the detection wells that were installed between the two liner layers.
· Finally 300 foot of 12” x 8” dual containment HDPE leachate transmission pipeline was installed and tied into the active treatment facility.
|
|||||||||||