Prop 50 Project Completion Report Project 50-4 Ray Stoyer Water Recycling Facility Demonstration Project
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1 Prop 50 Project Completion Report Project 50-4 Ray Stoyer Water Recycling Facility Demonstration Project June 1, 2016 Presentation to IRWM Regional Advisory Committee
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3 Padre Dam s IPR Program Goals Produce minimum of 15% of District s Potable Supply (approx AF/Y of local supply) Price of water < $2,000 /AF Gain regulatory acceptance & meet regulatory requirements for full scale Potable Reuse Project Support District s Strategic Goal to Increase Water, Wastewater and Energy Independence Reduce PLWWTP offloading requirement
4 East County Regional Potable Water Feasibility Study Padre Dam MWD Helix Water District Study Area Boundary
5 Project Infrastructure Elements Sludge/ Brine Pipelines Ray Stoyer WRF Cogeneration Facility Purified Water Pipeline Lake Jennings Influent PS Santee Basin GRRP R. M. Levy WTP East Mission Gorge PS
6 Basic Demo Grant Info Grant - $3M Design Spring 2014 Construction Sept 2014 Mar 2015 Operation Mar 2015 Mar 2016 Final Report May
7 Demo Project Objectives Shortened response retention time Injection Wells 2 months 6 months Extraction Wells Free chlorine disinfection credit Free Chlorine Disinfection Chloramine Disinfection > 6 logs 2 logs?
8 Public Health POTABLE REUSE Monitoring
9 What we lose with less time: - Treatment in the aquifer - Time to respond to failures Monitoring
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11 How we compensate: - Treatment in aquifer Enhance treatment above ground - Time for failure response Monitoring
12 How we compensate: - Treatment in aquifer Enhance treatment above ground - Time for failure response Decrease time needed to detect compromise or failure Monitoring
13 Public Health Monitoring
14 DDW Pathogen Requirements Giardia: 10-log removal % Crypto: 10-log removal % Virus: 12-log removal %
15 Padre Dam s Advanced Treatment Train Standard Advanced Treatment Train Secondary Effluent Membrane Filtration Reverse Osmosis Ultraviolet Light/Advanced Oxidation Aquifer
16 Padre Dam s Advanced Treatment Train Standard Advanced Treatment Train Secondary Effluent Membrane Filtration Reverse Osmosis Ultraviolet Light/Advanced Oxidation Aquifer Padre Dam s Advanced Treatment Train Secondary Effluent Membrane Filtration Reverse Osmosis Ultraviolet Light/Advanced Oxidation Aquifer
17 Padre Dam s Advanced Treatment Train Standard Advanced Treatment Train Secondary Effluent Membrane Filtration Reverse Osmosis Ultraviolet Light/Advanced Oxidation Aquifer Padre Dam s Advanced Treatment Train Secondary Effluent Free Chlorine Membrane Filtration Reverse Osmosis Ultraviolet Light/Advanced Oxidation Aquifer
18 Free Chlorine Disinfection Benefits All pathogen requirements met above ground Crypto Secondary Treatment Free Chlorine Ultrafiltration RO UV AOP Giardia Virus Bacteria
19 AL1 Demo Project Overview Demonstration Testing 12 months On-line performance and challenge testing More than 4,500 water quality samples NWRI Expert Panel 3 workshops Review/acceptance of testing plan and final results DDW Engagement Reviewed and accepted testing plan Attended all IAP workshops
20 Slide 19 AL1 Add RWQCB engagement? Suggest moving this to slide #16 Albert Lau, 5/31/2016
21 NWRI Independent Advisory Panel Members Jason Dadakis Rick Gersberg Amy Childress Jim Crook (chair) Channah Rock Dan Gerrity
22 Free Chlorine Disinfection
23 IAP Supports Free Chlorine based on the challenge testing undertaken for free chlorine disinfection, the Panel supports the use of 5-log credit when achieving a free chlorine CT value of greater than 2 milligramminutes per liter (mg-min/l).
24 Ultrafiltration Toray HFU-2020N membranes
25 Reverse Osmosis
26 UV/AOP
27 Overall Pathogen Reduction Organism Proposed Pathogen LRV Values Redundancy Required WRF FC MF/UF RO UV/AOP Aquifer Total Virus Giardia Cryptosporidium
28 Treatment Conclusions Enhanced treatment provides control of all pathogens at AWPF Monitoring provides on-line, continuous verification of treatment performance Demonstrated high degree of control of chemicals, including regulated constituents, endocrine disruptors, chemicals of emerging concern, and disinfection by-products
29 Public Health Monitoring
30 IAP Supports Short Retention Time The Panel believes the proposed approach of enhanced treatment and monitoring used by the AWPF seems to be appropriate to achieve adequate RRT.
31 Conclusions Final report submitted to DDW in May 2016 Results serve as basis for permitting future full-scale potable reuse projects Additional treatment barrier provides versatility for both groundwater and surface water projects
32 Public Outreach Over 2,000 toured the facility Project website developed ( Fact sheets and other publicity materials produced Speakers bureau program School age educational materials and scout patch program Presentations to community leaders Award winning video produced ( 31
33 32 QUESTIONS?
34 33 EXTRA SLIDES
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