CONSENT AGENDA ITEM NO. 7D

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1 CONSENT AGENDA ITEM NO. 7D FOR COUNCIL: March 14, 2016 SUBJECT: Consideration of waiving the formal bidding process of a limited source, as outlined in the limited source justification form, and enter into a Contract with Lai Ltd., of Rolling Meadows, Illinois, for the supply of two Wemco-Hidrostal Pumps for installation at the Water Treatment Plant. RECOMMENDATION/MOTION: That the Council waive the formal bidding process, as outlined in the limited source justification form, and enter into a contract with Lai Ltd., in the amount of $54,372.00, to supply two Wemco-Hidrostal Pumps for installation at the Water Treatment Plant, and the City Manager and City Clerk be authorized to execute the necessary documents. STRATEGIC PLAN LINK: Goal 2 Upgrade City Infrastructure and Facilities; Goal 5 Great Place Livable, Sustainable City STRATEGIC PLAN SIGNIFICANCE: Objective B Quality water for the long term; Objective A Well-planned City with necessary services and infrastructure BACKGROUND: The two Wemco-Hidrostal Pumps (sludge pit pumps) at the Water Treatment Plant have failed and needed to be replaced. The existing failed pumps were originally purchased in 1986 and have been rebuilt once previously. To avoid disruption in the process of discharging sludge from the clarifiers, the City of Bloomington is currently renting a portable diesel operated pump from Rain for Rent of Joliet, Illinois. The Water Treatment process at Lake Bloomington begins with the addition of coagulant chemicals which cause very fine particles (suspended solids) present in the Lake water to clump together, or coagulate. The settled particles form a sludge layer on the bottom of each clarifier, which is pumped to the sludge pit, and further pumped from the sludge pit to the Sludge Lagoons. There are two Wemco-Hidrostal Pumps located in the sludge pit that discharges the sludge through an eight inch diameter pipe to the lagoons located approximately one half mile away from the Water Treatment Plant. The two Wemco Pumps have been pumping sludge, made up of suspended solids and lime grit, which has caused wear and tear on the pump components. Due to the corrosive nature of the lime grit, part of stainless steel shafts have corroded and are not functioning. The lime made its way to into the housing and contaminated the bearings, resulting into catastrophic bearing failure due to the contamination. Staff performed a price comparison of repairing the existing pumps and new replacement pumps. The cost of repair for both pumps submitted by Decatur Industrial, is $33,914.45, while the

2 replacement cost for two new pump submitted by LAI Ltd., is $54, Though the pump replacement quote is larger than the repair estimate, the replacement pump will provide for a longer life span. The existing pumps utilized a packing gland seal, whereas the replacement pumps will incorporate a (water sealed) mechanical seal. Continuous flushing water supply, via ¼ inch tubing, will enter the collar to lubricate the mechanical seals and to prevent the lime grit from making contact with the seals. The water will then exit through the discharge side of the pump. The expected life of the replacement pumps is approximately 7 to 10 years. This modification is essential to prevent lime grit contamination in the pump shaft and bearings. In addition, this feature will improve the performance, efficiency, and lifespan of the pumps, resulting in a more economical installation in the long term. The Wemco-Hidrostal pump brand is the only one staff is aware of that is compatible with the existing piping layout, configurations, physical dimensions of the discharge pipe, physical dimension of suction pipe, alignment of the pump discharge to existing pipe interconnections, alignment details of pump suction to the existing pipe interconnections. The material construction of Wemco-Hidrostal pump is specifically made for lime grit application (rotating impeller is made of high chrome materials), the base of the pump is specifically designed for the height of the pump suction and discharge side. Other pump alternatives will not fit on the exact orientations of suction and discharge side of the existing piping layout. City staff recommends the purchase of two Wemco-Hidrostal Pumps from Lai Ltd., of Rolling Meadows, Illinois. The total cost of two replacement pumps is $54, COMMUNITY GROUPS/INTERESTED PERSONS CONTACTED: Not applicable FINANCIAL IMPACT: Upon approval, the procurement will be paid out of Water Purification-Capital Outlay Equipment Other Than Office account ( ). Funds are available in the budget roll-up accounts for this purchase. The roll-up account includes Water Purification-Plant Construction ( ). Stakeholders can locate this in the FY 2016 Budget Book titled Other Funds & Capital Improvement Fund on page 125. Respectfully submitted for Council consideration. Prepared by: Reviewed by: Financial & budgetary review by: Legal review by: Jesus Tubia, Superintendent of Mechanical Services Robert Yehl, PE, Water Director Chris Tomerlin, Budget Analyst Carla Murillo, Budget Manager Jeffrey R. Jurgens, Corporation Counsel Recommended by:

3 David A. Hales City Manager Attachments: Decatur Industrial repair estimate ($33, total for two pumps) Lai Ltd., replacement quote ($54, total for two pumps) Sole Source letter from Weir Specialty Pump (manufacturer of Wemco-Hidrostal Pumps) Limited Source Justification Fig. 1A (Photos of the damaged stainless steel shaft) Recommendation improvement (from Wemco Pump Manufacturer) Contract Motion: That the Council waive the formal bidding process, as outlined in the limited source justification form, and enter into a contract with Lai Ltd., in the amount of $54,372.00, to supply two Wemco-Hidrostal Pumps for installation at the Water Treatment Plant, and the City Manager and City Clerk be authorized to execute the necessary documents. Motion: Alderman Black Alderman Buragas Alderman Fruin Alderman Hauman Alderman Lower Seconded by: Aye Nay Other Aye Nay Other Alderman Mwilambwe Alderman Painter Alderman Sage Alderman Schmidt Mayor Renner

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11 Seals in the bearings were broken due to corrosion and contamination causing bearings to be lock out Corrosion in part of the shaft where packing glands are installed have caused contamination in thebearings

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