Explanation
1. BACKGROUND
This ordinance authorizes the Director of Public Utilities to enter into a planned contract modification for professional engineering services with HDR Engineering Inc., for the Southerly Waste Water Treatment Plant (SWWTP) Biofilter Cold Weather Reliability Improvements project CIP # 650352-100008, in an amount up to $2,137,238.13.
This original contract for this project provided preliminary design services for upgrades and improvements to the existing Odor Control Facility (OCF), the carbon Biotower and ventilation system serving the Sludge Loadout Building (SLB), and to the foul air fans at the Gravity Thickening Building (GTB) to improve odor control. These improvements will provide active ventilation, prevent corrosion, reduce foul air, and provide an Interconnector Junction Chamber (IJC) Odor Improvement Report on the IJC regarding the probability of success using existing OCF equipment to improve odor reduction or design a separate odor control facility for the IJC under a future contract.
This modification (modification number 1) will be for Step 2 - Detailed Design Services and will provide bidding and contract documents for the construction phase of this project. A future, second modification will be for Step 3 - Services during construction which includes technical field representation and other services throughout the construction phase of the project may be requested at the completion of Step 2 Services.
This work will primarily be performed in Columbus Community Areas 99- Citywide.
1.1. Amount of additional funds to be expended: $2,137,238.13
Original Contra $712,102.10 (ORD 1934-2023; PO406231)
Modification #1: $2,137,238.13 (current)
Modification #2: $3,030,000.00 (future)
Total $5,879,340.23
1.2. Reasons additional goods/services could not be foreseen:
Modifications were anticipated and explained in the original legislati...
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