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6.1 Wellhouse No. 4 Water Treatment Improvements Project PowerPoint
Water Treatment Improvements Presented by: Advanced Engineering and Environmental Services, LLC (AE2S) February 2023 Summary of Topics •Good News! •Background Information •Manganese Maps •Engineering Scope •Draft Schedule Good News! Funding Update •Awarded FY 23 Congressionally Directed Spending: $3.4MM (approx. 80-percent) •Filtration implementation for existing Wellhouse #4 Background Information –Why Additional Treatment? •Drinking Water Challenges o Quantity o Quality o Manganese –aesthetics, health advisory o Radium –maximum contaminant level o Iron –aesthetics DRINKING WATER CIP: Manganese Conc. -Current DRINKING WATER CIP: Manganese Conc. –WH4 DRINKING WATER CIP: Manganese Conc. –both WTPs Project Elements •Remove Radium, Manganese, and Iron •Planned additions at WH4: ▪Granular media filtration ▪Chemical dosing ▪Backwash recovery system ▪Building improvements Engineering Scope •Regulatory / Grant Coordination •Piloting Testing Phase •Design Phase •Bidding Phase •Construction Phase (future amendment) Draft Schedule –Pending Funding Information •February 13 –Council approval of professional services agreement •February-April -Piloting Phase •April-October –Design Phase •November-December –Regulatory review •January 2024 –Bidding Phase •2024 –Construction •Early 2025 –Start-up QUESTIONS? Otsego WTP #4 Background Information •2020 Drinking Water Master Plan o Established water quality and quantity goals o Populations projections (development) drives quantity needs o Recommended Conversion of Wellhouses to WTPs (add filtration/chemicals) plus a larger Central WTP DRINKING WATER CIP: Radium Conc. –both WTPs Wellhouse 4 Interior DRINKING WATER CIP DRINKING WATER CIP: Hydraulic Modeling Regulation/Health Based Guidance Treatment Goal Combined Radium 5 pCi/L < 2.5 pCi/L Manganese 0.1mg/L MN infant < 0.05 mg/L 0.3 mg/L MN adult Iron 0.3 mg/L < 0.15 mg/L DRINKING WATER CIP: Iron Conc. –WH4 DRINKING WATER CIP: Iron Conc. –both WTPs DRINKING WATER CIP: Manganese Conc. -Current DRINKING WATER CIP: Manganese Conc. –WH3 DRINKING WATER CIP: Manganese Conc. –WH4 DRINKING WATER CIP: Manganese Conc. –both WTPs DRINKING WATER CIP: Radium Conc. –Current DRINKING WATER CIP: Radium Conc. –Current Peak DRINKING WATER CIP: Radium Conc. –WH3 DRINKING WATER CIP: Radium Conc. –WH4 DRINKING WATER CIP: Radium Conc. –both WTPs DRINKING WATER CIP: Radium Conc. –Peak Day both WTPs DRINKING WATER CIP: Iron Conc. -Current DRINKING WATER CIP: Iron Conc. –WH3