Explanation
This legislation authorizes the Director of Public Utilities to enter into an agreement with Kokosing Construction Company Inc. for the repair and installation of a Shan-Rod Damper at the Southerly Wastewater Treatment Plant and to waive the provisions competitive bids.
The Southerly Wastewater Treatment Plant has an immediate need for the replacement of the plant's two incinerator emergency bypass dampers. The necessary repairs cannot be accomplished by the City's own forces, with existing supplies and repair parts. The plant has solicited informal quotes for the required services and products from vendors qualified to do the necessary repair work and who are able to mobilize immediately.
The Southerly Wastewater Treatment Plant utilizes two multiple hearth incinerators to burn dewatered municipal sludge. These incinerators need to 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. On November 26, 2002 the plant experienced a fire on the main belt conveyor that runs over the top of the incinerators and feeds dewatered sludge into the incinerators. The investigation determined that the cause of the fire was No. 4 incinerator's induced draft fan tripped off and the inside the incinerator was pressurized, blowing fire out the incinerator feed conveyor feed port because the incinerator's emergency bypass damper failed to open as designed. An inspection of the damper failed to determine the exact cause of the failure, however operational tests showed that the damper would no longer open reliably at the current operating temperatures. Realignment of the damper shaft, bearings and damper actuator did not improve damper operation. Consequently, the plant had to revise its normal operating temperature for #1 (top) hearth of No. 4 Incinerator downward approximately 100 degrees F in order to get the damper to operate. Lowering the o...
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