Explanation
1. BACKGROUND:
A. Need. This legislation authorizes the Director of Public Utilities to enter into a construction contract with Adrian L. Wallick Company, for the Southerly Wastewater Treatment Plant Multiple Hearth Incinerator Rehabilitation project for the Division of Sewerage and Drainage.
The Southerly plant utilizes two multiple hearth incinerators to burn dewatered municipal sludge. These incinerators normally process an average of 240 wet tons of sludge per day in order for the plant to maintain its sludge inventory at an acceptable level and operate at peak efficiency. Inspection of the incinerators has revealed failure of internal components and serious problems in the incinerators' exhaust ductwork relating to the deterioration of the outer metal shell of the ductwork.
Operating the incinerator without making the necessary rehabilitation work could result in major damage to the incinerator and associated equipment. Failure to make the necessary rehabilitation also places the plant personnel's safety in danger due to the extremely high temperatures that can be present on the outside surface of the metal ductwork.
Having the plant's incinerators out of service for extended periods of time severely impacts the plant's ability to process and dispose of the required amount of sludge on a daily basis.
This contract Work consists of providing the needed rehabilitation for Incinerators No. 3 and 4. The major work for this project consists of refractory work for hearth and wall repair of Multiple Hearth Incinerators No. 3 and 4 and associated replacement of the following: Venturi ductwork, circular by-pass stack, two expansion joints in exhaust ductwork, incinerator roof plate, hearth repair and associated and/or damaged refractory.
An Alternate Bid Item 1 is also proposed which consists of removing the two existing fume incinerators and its associated equipment and patching and repairing the existing structures where the r...
Click here for full text