Backup — original pdf

Backup

Decentralized Reclaimed Water Forward Task Force November Meeting November 8, 2022 Decentralized Reclaimed: Water Forward Task Force Nov Meeting Agenda: • Decentralized Reclaimed Overview, 15 minutes • Where does Decentralized Reclaimed fit? • WF18 Targets • WF24 Update • Major Takeaways & Next Steps, 5 minutes • Discussion & Questions, 5 minutes Decentralized Reclaimed: Water Forward Task Force Nov Meeting Decentralized Reclaimed Decentralized Reclaimed is the collection of effluent from the wastewater system in development areas, treatment to non-drinking water quality at a small wastewater treatment plant, and reuse at the community scale via a decentralized reclaimed water distribution system that would be separate from the centralized reclaimed water system. Stormwater Harvesting Community Scale Sewer Mining Community Scale Distributed Wastewater Reuse Community Scale Decentralized Reclaimed Systems Decentralized Reclaimed: Water Forward Task Force Nov Meeting Water Forward 18 Targets • WF Targets estimated based on assumed uptake/saturation rates for each strategy. • Lot-scale reuse uptake rates ranged from 10% to 30% • Distributed WW Reuse uptake assumed to be 70% Strategy SF MF COM Scale 2040 Yield Target (MGD) Rainwater Harvesting Graywater Harvesting Blackwater Reuse A/C Condensate Reuse Stormwater Harvesting Sewer Mining Distributed WW Reuse Other Demand Mgmt Aquifer Storage & Recovery S S S S S S S S S S S S S S S S S S S 1.38 1.90 1.18 0.97 0.42 0.89 2.81 21.2 53.5 Lot Lot Lot Lot Lot N/A Lot/Community Lot/Community Community Decentralized Reclaimed: Water Forward Task Force Nov Meeting Where does Decentralized Reclaimed Fit? Private Decentralized Centralized Public Decentralized Reclaimed: Water Forward Task Force Nov Meeting Where does Decentralized Reclaimed Fit? Private Onsite Water Reuse • Parcel/Site Scale • Rainwater/Graywater/AC Condensate/Blackwater • Private ownership/operation Decentralized Centralized Public Decentralized Reclaimed: Water Forward Task Force Nov Meeting Where does Decentralized Reclaimed Fit? Private Onsite Water Reuse • Parcel/Site Scale • Rainwater/Graywater/AC Condensate/Blackwater • Private ownership/operation Decentralized Centralized Centralized Reclaimed • City/Service Area Scale • Blackwater • COA ownership/operation Public Decentralized Reclaimed: Water Forward Task Force Nov Meeting Where does Decentralized Reclaimed Fit? Private Onsite Water Reuse • Parcel/Site Scale • Rainwater/Graywater/AC Condensate/Blackwater • Private ownership/operation Decentralized Decentralized Reclaimed • District/Neighborhood Scale • Blackwater/All of the Above • COA ownership/operation YOU ARE HERE Public Centralized Centralized Reclaimed • City/Service Area Scale • Blackwater • COA ownership/operation Decentralized Reclaimed: Water Forward Task Force Nov Meeting Where does Decentralized Reclaimed Fit? Private Onsite Water Reuse • Parcel/Site Scale • Rainwater/Graywater/AC Condensate/Blackwater • Private ownership/operation Decentralized Decentralized Reclaimed • District/Neighborhood Scale • Blackwater/All of the Above • COA ownership/operation YOU ARE HERE Public Wholesale Wastewater Customers Centralized Centralized Reclaimed • City/Service Area Scale • Blackwater • COA ownership/operation Decentralized Reclaimed: Water Forward Task Force Nov Meeting WF18 GHD Map Updated Decentralized Reclaimed Map Decentralized Reclaimed: Water Forward Task Force Nov Meeting Distributed WW Reuse Overview • Existing WWTPs with reclaimed • Existing WWTPs with high reclaimed • Balcones • Riverplace • Lost Creek potential • Wild Horse • Taylor Lane • Pearce Lane • Future/Conceptual WWTPs with reclaimed • Lake & Rattan • Elm & Decker • North & South Fork • Bear & Little Bear Decentralized Reclaimed: Water Forward Task Force Nov Meeting Wild Horse - Overview • Located in the Gilleland Basin in Northeast Austin • Wild Horse PUD initiated in early 2000s and constructed Wild Horse WWTP (0.75 MGD initial capacity) • Expansion in progress to increase capacity to 2.25 MGD, additional expansions likely • Rapid growth observed over past 10 years, much of the remaining undeveloped land has active development applications in progress Decentralized Reclaimed: Water Forward Task Force Nov Meeting Wild Horse – Opportunities & Challenges • Currently only plan for reclaimed is designation of space on WWTP site • Adoption of decentralized reclaimed requires both infrastructure investment and accompanying policy mechanism to promote adoption • Currently no mechanism to incentivize or mandate adoption of reclaimed water supply for existing customers. Reclaimed connection ordinance could be used for future developments Decentralized Reclaimed: Water Forward Task Force Nov Meeting Pearce Lane WWTP Overview • Located in the Dry South Basin in Southeast Austin • SETC MUD initiated for the SunChase Development and constructed the Pearce Ln WWTP (0.3 MGD initial capacity) • Ultimate WWTP Capacity: 2.25 MGD • Potential for development & redevelopment within the basin Decentralized Reclaimed: Water Forward Task Force Nov Meeting Pearce Lane WWTP – Opportunities & Challenges • SETC MUD to construct Reclaimed Water Facilities at plant site as part of Consent Agreement • Ultimate Reclaimed Facility Capacity: 2.25 MGD • Opportunity to incorporate reclaimed sooner • Policies would be needed to require potential customers to use these facilities Decentralized Reclaimed: Water Forward Task Force Nov Meeting Major Takeaways & Next Steps • Need CIP / Development Infrastructure Funding & policy instrument to require connections & dual-plumbing • Requirement vs Incentives and respective urgencies • Wild Horse area growth could out-pace necessary reclaimed infrastructure and policies • Implementation coordination with SETC MUD to build reclaimed infrastructure and require potential customers to use these facilities • Currently no mechanism to incentivize or mandate adoption of reclaimed water supply for existing customers. Reclaimed connection ordinance could be used for future developments Decentralized Reclaimed: Water Forward Task Force Nov Meeting Discussion & Questions?