Title
Proposed Amendment No. 4
Contract No. 2000970/SCN-0000131
Rehabilitation of Screened Final Effluent (SFE) Pump Station
CIP# 216008 / BCE Score: 63.2
Body
Agenda of: November 21, 2024
Item No.: 2024-389
Amount: Original Contract $3,399,730.00
Amendment No. 1 488,611.00
Amendment No. 2 0.00
Amendment No. 3 0.00
Proposed Amendment No. 4 100,378,653.00
Total Contract Amount $104,266,994.00
TO: The Honorable
Board of Directors
Great Lakes Water Authority
FROM: Suzanne R. Coffey, P.E.
Chief Executive Officer
Great Lakes Water Authority
DATE: October 31, 2024
RE: Proposed Amendment No. 4
Contract No. 2000970/SCN-0000131
Rehabilitation of Screened Final Effluent (SFE) Pump Station
Vendor: NORESCO, LLC
Status: Amendment/Change Order
MOTION
Upon recommendation of Navid Mehram, Chief Operating Officer - Wastewater Operating Services, the Board of Directors (Board) of the Great Lakes Water Authority (GLWA), authorizes the Chief Executive Officer (CEO) to enter into Contract No. 2000970/SCN-0000131, Proposed Amendment No. 4, “Rehabilitation of Screened Final Effluent (SFE) Pump Station” with NORESCO, LLC, with an increased cost of $100,378,653.00 for a total cost not to exceed $104,266,994.00 and an increased duration of 1,200 days for a total duration of 2,657 days; and authorizes the CEO to take such other action as may be necessary to accomplish the intent of this vote.
BACKGROUND
The Water Resource Recovery Facility (WRRF) is a heavy user of clean water for processing wastewater. The water is used for pumping, cleaning, and conveying chemicals as carrier water. The water for the above is supplied through two sources. One source is the potable water supply provided through the GLWA transmission system, while the second source is extracted from the effluent of the WRRF. Potable water is used for drinking and sanitation and through appropriate protection converted to Secondary Water for a variety of process water and pump seal water. The WRRF effluent is pumped into the facility for incinerator scrubber water, biosolids dryer scrubber water, belt filter press wash water, sludge-rinsing water for gravity thickeners, and other various process and washdown uses. The pump station (PS) used to convey the WRRF effluent into the plant for the above process is referred to as the Screened Final Effluent (SFE) pump station.
The existing SFE PS is nearly 50 years old and in poor condition. The station was originally designed to support 16 incinerators and a variety of processes. In 2016, the facility decommissioned eight of 16 incinerators and revised the operation of the incinerators to maximize the facility’s efficiency. The above modification has made the SFE pump station significantly oversized. The SFE pump station includes eight pumps with a total capacity of approximately 135 million gallons per day (MGD). The current SFE usage is approximately 23 MGD. Four of these pumps were originally installed in 1973 and rebuilt in 1998. Two more were installed in 1980 and rebuilt in 1998, while the remaining two were installed in 1998.
The Wastewater Master plan published in 2020 identified the expansion of the SFE use within the facility and the rehabilitation of the station. The expansion considered limiting the dependency on the transmission supply to maximize the WRRF’s resiliency and reliability. Thereafter, GLWA awarded Contract No. 2000970 “Rehabilitation of Screened Final Effluent Pump Station” to NORESCO LLC (Design/Build Contractor) for $3,399,730.00 with a start date of April 5, 2021. The contract is for a progressive design build project delivery, which is broken into two phases. The first phase included alternative evaluations, basis of design report, 30% design, 60% design, and finally a lump sum proposal to complete the design and construction of the improvements. The second phase will include completing design, construction, startup, commissioning, training, and measurement/verification of performance. During design (phase 1), analysis showed that there were additional opportunities to improve the resilience of the system, and the contract was amended for an additional $488,611 for design work in 2023.
NORESCO has developed a 60% complete design and submitted a lump-sum proposal for the remaining design and construction work. GLWA has reviewed the proposal, including details on the subcontractor bidding process, and negotiated the original proposed price of phase 2 down from $104,835,501 to $100,378,653. Additionally, the owner-controlled provisional allowance (included in the phase 2 cost above) was increased from $1,000,000 to $5,000,000 during negotiations.
JUSTIFICATION
The SFE PS plays a key role in maintaining compliance with regulatory permits, including the incinerator air permit and the National Pollutant Discharge Elimination System (NPDES) permit. Given the essential role of the SFE pump station and the fact that over 25 years have passed since the last major rehabilitation, a significant upgrade is required to maintain system reliability. A past potable water outage highlighted the risks associated with relying solely on potable water for chlorination and dechlorination, and basic operations of the WRRF as it nearly resulted in a permit violation due to the lack of a backup water source. This incident further highlighted the need for resiliency within our water supply for wastewater plant operations.
The new station will be located on plant ground and will include new pumps sized to match the capacity requirements, improving energy efficiency and reducing maintenance costs compared to the existing oversized pumps. Additionally, the existing quality of the SFE water is insufficient for certain on-site uses, carrier water for chemical treatment processes, as an example. This project will improve the quality of the SFE, enabling it to act as a redundant source of carrier water for chemical treatment applications such as for chlorination and dechlorination.
This project aligns with the WRRF's broader goals of resource recovery and sustainability. This project improves the resilience of the WRRF and ensures that the WRRF can continue to discharge treated effluent into the waters of the state while remaining in compliance with our air and NPDES permits, which protects public health and the environment.
PROJECT MANAGEMENT STATUS
Original Contract Time 1,052 days (04/05/2021 - 02/20/2024)
Amendment No. 1 0 days
Amendment No. 2 223 days (02/21/2024 - 09/30/2024)
Amendment No. 3 182 days (10/01/2024 - 03/31/2025)
Proposed Amendment No. 4 1,200 days (04/01/2025 - 07/13/2028)
New Contract Time 2,657 days (04/05/2021 - 07/13/2028)
PROJECT ESTIMATE
Original Contract Price $3,399,730.00
Amendment No. 1 488,611.00
Amendment No. 2 0.00
Amendment No. 3 0.00
Proposed Amendment No. 4 100,378,653.00
New Contract Total $104,266,994.00
FINANCIAL PLAN IMPACT
Summary: Sufficient funds are provided in the financial plan for this project.
Funding Source: Wastewater Construction Fund
Cost Center: Wastewater Field Engineering
Expense Type: Construction (5421-892211.000-616900-216008)
Estimated Cost by Year and Related Estimating Variance: See table below.
Original Contract Price $3,399,730.00
Amendment No. 1 488,611.00
Amendment No. 2 0.00
Amendment No. 3 0.00
Proposed Amendment No. 4 100,378,653.00
New Contract Total $104,266,994.00
Amended Financial Plan Estimate: 98,888,000.00
Estimating Variance (5,378,994.00)
If approved, Proposed Amendment No. 4, a negative estimated variance of ($5,378,994.00) is created. This variance will be funded from Capital Reserves.
COMMITTEE REVIEW
This item was presented to the Operations and Resources Committee at its meeting on November 13, 2024. The Operations and Resources Committee unanimously recommended that the GLWA Board adopt the resolution as presented.
SHARED SERVICES IMPACT
This item does not impact the shared services agreement between GLWA and DWSD.