Title
Proposed Amendment No. 5
Contract No. 1802543/SCN-0000063
Rehabilitation of Ferric Chloride Feed System at PS-1 and Complex B Sludge Lines
CIP#211008/BCE Score: 78.3
Body
Agenda of: December 11, 2024
Item No.: 2024-401
Amount: Original Contract $2,322,045.00
Amendment No. 1 0.00
Amendment No. 2 0.00
Amendment No. 3 0.00
Amendment No. 4 0.00
Proposed Amendment No. 5 0.00
Total Contract Amount $2,322,045.00
TO: The Honorable
Board of Directors
Great Lakes Water Authority
FROM: Suzanne R. Coffey, P.E.
Chief Executive Officer
Great Lakes Water Authority
DATE: November 25, 2024
RE: Proposed Amendment No. 5
Contract No. 1802543/SCN-0000063
Rehabilitation of Ferric Chloride Feed System at PS-1 and Complex B Sludge Lines
Vendor: Hazen and Sawyer
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. 1802543/SCN-0000063, Proposed Amendment No. 5, “Rehabilitation of Ferric Chloride Feed System at PS-1 and Complex B Sludge Lines” with Hazen and Sawyer, with no increase in cost for a total cost not to exceed $2,322,045.00 and an increased duration of 200 days for a total duration of 2,232 days; and authorizes the CEO to take such other action as may be necessary to accomplish the intent of this vote.
BACKGROUND
The main objective of the Hazen and Sawyer contract was to design a new Ferric Chloride feed system originating in Pump Station 2 (PS-2) and providing a feed of Ferric Chloride solution to existing Pump Station 1 (PS-1) via a new chemical feed system installed in the pipe gallery at the Water Resource Recovery Facility (WRRF). Additionally, under this contract, Hazen and Sawyer was retained to develop a design to rehabilitate the existing thickened waste activated sludge line which conveys liquid sludge from Complex B to Complex A at the WRRF. Further, the contract requires Hazen and Sawyer to provide construction phase engineering support, including reviews of the construction contractor’s submittals, responses to requests for information, development of as-built drawings, assistance in developing punch lists, and other services. The associated construction contract with this project (Contract No. 2002190) achieved final completion on August 30, 2024. However, while GLWA was preparing the documents to close out the Hazen and Sawyer contract (Contract No. 1802543), a leak was observed in the ferric chloride piping system during normal operations. Therefore, additional time is required to conduct a root cause analysis and produce revised drawings to address construction corrective work.
JUSTIFICATION
Time extension of the current consultant services Contract No. 1802543 held with Hazen and Sawyer is necessary to investigate and resolve the recently observed ferric chloride leak issues during normal operations. The leaks are suspected to stem from design deficiencies. To correct these issues, a root cause analysis will be conducted, followed by the preparation of the revised drawings and specifications. The Construction Contract for this project (Contract No. 2002190) reached final completion on August 30, 2024, and therefore, a determination on the methodology to complete the corrective construction work shall be made upon completion of the root cause analysis and revised drawings and specifications. In light of the above, GLWA Wastewater Engineering recommends extending the completion date of this Contract, with no increase in the contract amount.
PROJECT MANAGEMENT STATUS
Original Contract Time 976 days (05/22/2019 - 01/21/2022)
Amendment No. 1 439 days (01/22/2022 - 04/05/2023)
Amendment No. 2 244 days (04/06/2023 - 12/05/2023)
Amendment No. 3 190 days (12/06/2023 - 06/12/2024)
Amendment No. 4 183 days (06/13/2024 - 12/12/2024)
Proposed Amendment No. 5 200 days (12/13/2024 - 06/30/2025)
New Contract Time 2,232 days (05/22/2019 - 06/30/2025)
PROJECT ESTIMATE
Original Contract Price $2,322,045.00
Amendment No. 1 0.00
Amendment No. 2 0.00
Amendment No. 3 0.00
Amendment No. 4 0.00
Proposed Amendment No. 5 0.00
New Contract Total $2,322,045.00
FINANCIAL PLAN IMPACT
Summary: Sufficient funds are provided in the financial plan for this project.
Funding Source: Sewer Construction Fund
Cost Center: Wastewater
Expense Type: Design (5421-892211.000-617950-211008)
Estimated Cost by Year and Related Estimating Variance: See table below.
Original Contract Price: $2,322,045.00
Amendment No. 1 0.00
Amendment No. 2 0.00
Amendment No. 3 0.00
Amendment No. 4 0.00
Proposed Amendment No. 5 $0.00
New Contract Total: $2,322,045.00
Amended Financial Plan Estimate: $2,322,045.00
Estimating Variance: 0.00
COMMITTEE REVIEW
This item was presented to the Operations and Resources Committee at its meeting on December 11, 2024.
SHARED SERVICES IMPACT
This item does not impact the shared services agreement between GLWA and DWSD.