Agenda - Council - 11/14/2023 - Laserfiche WebLink

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n ES www.ae2s.com RFP No. 002: Air Exchange Modifications in Plate Settler Room: The initial plans for the project were to include an emissions hood over the top of each plate settler to vent out any potential radon emissions. As a result, the size of the air exchange system in the plate settler room was reduced. After talking with several utilities with similar plate settlers, it was determined that a vent hood would make it difficult for operators to access and maintain integral parts of the plate settler. It is our recommendation that we remove the radon emissions hood from the project and accurately size the air exchange system for the space.This will include costs associated with increasing ductwork and louver sizes for the room. The proposal also includes a cost deduction for the original bid price of the radon emissions hood and associated ductwork. RFP No. 004: Blower Pipe Upsizinj!: The air scour blower supplier is recommending that the suction and discharge piping on the blower be upsized from the proposed 8" to 10" to velocity and noise from the system. This change will not alter the price of the blower system package that will be supplied by the manufacturer. However, it will require Magney to upsize the blower suction and distribution pipes and valves from the blower to the air scour system at the filters. In addition to pipes and valves being upsized,we requested Magney to include pricing for the suction and bypass pipes from the blower to penetrate the roof rather than the west exterior wall. This will reduce exterior noise from the blower and allow for better operator access for cleaning the bug screen and any other future maintenance. Building Permit Reimbursement: In accordance with the Supplementary Conditions 7.09 (specifically, SC-7.09 B, 3) Magney Construction is seeking reimbursement of the costs associated with the City of Ramsey Building Permit. This reimbursement was approved and applied to Pay Application No.4 as a Construction Contingency Expense. Groundbreaking Sign Reimbursement: Magney Construction, Inc. is seeking compensation for necessary labor,material and/or equipment to provide the groundbreaking ceremony sign,as requested in our email correspondences on 7/13/23. Magney Construction expedited the fabrication and delivery of the AE2S'designed signage for the City of Ramsey's Groundbreaking Ceremony. This reimbursement was approved and applied to Pay Application No. 4 as a Construction Contingency Expense. Summary of General Construction Contingency Costs: AE2S has summarized all known construction contingency expenses at this time in order to help the City of Ramsey better understand the current contingency status. As Construction progresses, AE2S will continue to provide cost updates and coordinate with City staff. Original General Construction Contingency Amount $ 95000.00 Expense No. 1 $761446.53 Expense No.2 $1351654.02 Net Expenses to Date: $2129100.55 Available Construction Contingency= $7379899.45 Advanced Engineering and Environmental Services, Inc. 6901 East Fish Lake Road, Suite 184 • Water Tower Place Business Center • Maple Grove, MN 55369 • 763-463-5036