8l. Presentation - Industrial Wastewater Treatment Plant Program
Item No. 8l_supp Meeting Date: December 14, 2021 Industrial Wastewater Treatment Program Preliminary Design Funding Location IWTP N 2 Location Lagoon 2 Lagoon 1 IWTP Lagoon 3 N 3 Industrial Wastewater Treatment Plant (IWTP) OverviewS 146th St Runoff with low Biochemical Oxygen Demand Ave S (BOD) discharges to the Puget Sound th 24 Runoff with high BOD discharges to King County Sewer District for secondary treatment The Port has diverted 11.6 million pounds of BOD from the Puget Sound since 2007 4 King County Permit Changes S 146th StHigh BOD discharges have resulted in operational impacts to King County South Treatment Plant th 24 Ave S King County BOD limits will be reduced to 25% of the current permit levels on the next permit cycle (2026) New permit limits will require pretreatment onsite at STIA before discharge to King Country Sewer District 5 Project Overview Purpose: Install a pre-treatment system and upgrade the existing systems at the Industrial Wastewater Treatment Plant (IWTP) to reduce high-BOD effluent. Scope: Install pre-treatment system Install effluent discharge systems Install new pumps and systems to support stormwater reuse Establish storage system to facilitate pre-treatment Install support infrastructure (new building, controls, HVAC, lagoon mixing, etc.) 6 Additional Project Information Current Approach S 146th StPlanning funds will be used to develop: Detailed Basis of Design (treatment configuration, storage options, infrastructure needs) th Ave S Project Notebook 24 Updated cost estimate Evaluation of siting and permitting requirements Coordination with FAA, WA Department of Ecology, King County will be required King County Planning Phase Milestones Draft Engineering Report due August 31, 2022 Final Engineering Report due December 31, 2022 7 Project Budget & Schedule CIP: C801234 Preliminary Schedule Milestones: Budget: $100,000,000 - $200,000,000 Preliminary Design Start: Q1 2022 Previous Authorization: $135,000 Design Start: Q2 2023 Current Request: $2,000,000 Construction Start: Q1 2025 In-Use Date*: Q4 2026 - Q2 2027 8 Cone of Certainty We are here 9 Action Requested 1) Advertise and execute a contract for Architecture and Engineering (A&E) services for the IWTP Program (CIP C801234). The amount of this request is $2,000,000 for a total estimated project cost of $100M-$200M. 10 Thank You! Operated by the Port of Seattle FlySEA.org
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