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File #: 1284-2005    Version: 1
Type: Ordinance Status: Passed
File created: 7/6/2005 In control: Utilities Committee
On agenda: 7/25/2005 Final action: 7/27/2005
Title: To authorize the Director of Public Utilities to modify and existing contract with US Filter/Envirex for repairs of the Dystor membranes of Digester 1 at the Jackson Pike Wastewater Treatment Plant for the Division of Sewerage and Drainage, to authorize the expenditure of $221,900.00from the Sewerage System Operating Fund, to waive the provisions of Columbus City Code Section 329.07 and to declare an emergency. ($221,900.00)
Attachments: 1. Digester #1 Membrane Waiver Form.pdf, 2. Dystor Mod-Information Form.pdf
Explanation

The purpose of this legislation is to authorize the Director of Public Utilities to modify an existing agreement with US Filter/Envirex for additional emergency repairs of Dystor framework on Digester#1 for the Jackson Pike Wastewater Treatment Plant with US Filter/Envirex. On March 23, 2004, the Division of Sewerage and Drainage, Jackson Pike Wastewater Treatment Plant experienced a superstructure failure on the Dystor framework of Digester #1. The cover is part of the Biogas (methane) handling system at the wastewater treatment plant. The plant had to take immediate action to correct the structure and have it supported. If this structure did not receive immediate attention, there was a potential for the gas well to fall into the digester and the risk of an explosion. Some of the collapsed structure punctured the fabric. Since the incident the treatment capacity has of the digester has fallen 16%

The Jackson Pike Wastewater Treatment Plant immediately contacted the manufacturer of the Digester cover US Filter/Envirex Inc. The company immediately placed supports to reinforce the structure to diminish the risk of total collapse or explosion. However, the structure needs to be replaced and the risks of collapse and explosion are still present. US Filter/ Envirex will fabricate and then install a new cover which will take approximately 10 weeks to accomplish.

On May 30, 2005 a wind storm collapsed the structure into the digester which ripped the membranes. Though the digester is not in service, this situation has caused a reduction in capacity and could lead to by -pass to the Southerly Wastewater Treatment Plant which would create more stress on their treatment system. The additional work includes the temporary support of the structure, replacement of the inner and outer membrane, testing, re-inflation and restart of Digester #1

The lead time to obtain the necessary supplies and parts to repair the digester is 8-10weeks and there was not s...

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