Item 3: Ratification of MWMC Budget

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Metropolitan Wastewater Management Commission Capital Improvement Program SODIUM HYPOCHLORITE CONVERSION Description: Convert the existing chlorine gas system to sodium hypochlorite for the base and wet weather flows. Retain the existing chlorine contact basins for the disinfection process. Install new system with capability for high rate disinfection of primary effluent diversion using dosages of sodium hypochlorite into a new contact basin structure. The new contact basin has been split off of this project and is now part of a different MWMC project (Peak Flow Management Improvements), so the budget for that portion of the project has also been moved. Staff included upgrades of the existing recreational vehicle (RV) wastewater dump station to accommodate boat wastewater dumping in the construction bid documents for the sodium hypochlorite conversion project. The boat wastewater dump modification was designed and grant funded by the Oregon State Marine Board that the MWMC approved for implementation at the September 21, 2006 public meeting. The recommended project budget below includes $80,000 allocated to the project for the boat wastewater dump that was reimbursed by the State agency after construction was completed. Some of the project funding will support the treatment plant landscape upgrades. Status: The upgraded disinfection system has been continuously used since March of 2010. As of December 22, 2010, Emery and Sons Construction and a vendor are following up on improving the sodium hypochlorite injection/mixing system related to the specified performance requirements. Completion of this system is anticipated in early 2011. Justification: Liquid sodium hypochlorite and sodium bisulfite system will replace the existing chlorine and sulfur dioxide gas systems and increase the disinfection capacity from 175 mgd to 277 mgd. The high rate disinfection of the primary effluent is a key component of the primary/secondary split treatment process, which is needed for meeting the peak flow capacity needs of the wastewater treatment plant. Project Driver: Operator and community safety issues and meeting flow capacity requirements for peak flows. Project Trigger: Phasing with other related MWMC projects and the need to meet peak flow treatment requirements. Project Type: 50% Capacity;50% Performance Improvement SDC Eligibility: 25% Estimated Project Cost: $7.8 million (part of the project money will support the treatment plant landscape upgrades) Expected Cash Flow: FY 06-07 = $1,353; FY 07-08 = $594,520; FY 08-09 = $3,319,347; FY 09-10 = $(102,501); FY 10-11 = $1,010,281; FY 11-12 = $250,000; FY 12-13 = $50,000; FY 13-14 = $2,677,000 (construction, landscape, administration, consultant services) 2010-11 Expenditure/Category:Prior Years2011-122012-132013-142014-152015-16Total Est. Act. Design/Construction $3,812,719 $1,010,281 $2,977,000 0000$7,800,000 Other 00000000 Total Cost $3,812,719 $1,010,281 $2,977,000 $0$0$0$0$7,800,000 Page 52 DRAFT FY 11-12 BUDGET AND CIP