water in the west and beyond — trends, policies, and ...€¦ · pfos ≤ 2000 ppt. texas –...
TRANSCRIPT
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Water in the West and Beyond —Trends, Policies, and Implications
WWEMA 111th Annual MeetingNovember 2019
Guy Carpenter, PE
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The “Punch Line”
• Treatment• Desalination
• MF/RO + AOP
• Ozonation/Biofiltration + AOP
• Carbon Adsorption (GAC)
• Ion Exchange
• Anaerobic treatment
• Management• More wells
• More recharge
• Decentralized & on-site
• Real time monitoring
• Data analytics & enterprise systems
• Augmentation projects
• Redundancy & resiliency• Regional programs
• Interconnections
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Water Scarcity & Policy
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Arizona
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Drought Contingency Plan
• The goal is to protect the Colorado River system by having Arizona, California, Nevada, and Mexico agree to voluntarily use less water to ensure Lake Mead levels do not plummet to dangerously low levels.
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DCP Related Legislation (Arizona)
• Sunset on recharge credit accrual was removed
• Instead of 50% cut to aquifer on managed recharge projects, now only have 5% cut to aquifer
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Tier Zero –Just below 1090’ in 2020
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Long-Term Water Supply Options for ArizonaFinal Report – August 2019
• Impediments to Water Augmentation:
• Little Colorado River and Gila River Stream Adjudications
• Unresolved Indian Water Rights Claims
• Lack of Statewide Groundwater Management Planning
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Another layer of Uncertainty –The Adjudication
• Massive lawsuit to determine the nature and priority of every water right claimed on the Gila River and all its tributaries
• 32,000 parties and almost 57,000 competing water rights claims.
• Since 1974
• Surface water & subflow
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West Valley CitiesBuild-Out Water Demands, Current Water Resources, Unmet Water Demands (August 2015)
Unmet Water
Demands
553,252 AF
Current Water
Resources Portfolio
267,129 AF
Build-Out Population - 4,099,290
Total Build-Out Demand – 820,381 AF
WATER PROVIDERS
Avondale
Buckeye
El Mirage
Glendale
Goodyear
Peoria
Surprise
EPCOR
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California
Credit to Beverly Hann,
Carollo Engineers
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Priority Areas
• Priority 1 Area (Red) –Notice to Comply within one year of Basin Plan amendments becoming effective
• Priority 2 Area (Orange) –Notice to Comply within 2-4 years of Basin Plan amendments becoming effective
• Non-priority Areas (Green) –Implementation to be phased in at a later date
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Overall timeline
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WDRs for Discharges to Land
• Waste Discharge Requirements (WDRs):• Do no expire
• Many existing WDRs are out of date
• The Water Boards are starting to recommend WDR review/renewal
• Number of active food processing (and “other”) facilities >1,000
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Sustainable Groundwater Management Act (SGMA)
• Requires that all high- and medium-priority basins (groundwater dependent regions) halt overdraft and bring basins into balanced levels of pumping and recharge.
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Glimpse into the future…
• Tahoe-Reno Industrial Center (TRIC), Reno Nevada
• Google, Tesla, Amazon
• 4,000 AFY (3.5 MGD) of effluent delivered
• Exchanged with other water rights
• Joliet, Illinois • Population of ~150,000
• Running out of groundwater in 11 years
• 5 alternatives for 30 – 60 MGD
• $600M to $1B?
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Implications of Water Scarcity• Wells
• New• Rehabilitation• Wellhead treatment
• Recharge• Basins• Injection wells• Aquifer storage & recovery wells
• Water Augmentation• Direct potable reuse• Desalination• Large conveyance projects
• Conservation• Water age (DDPs & regrowth)• Water leak / break monitoring
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Direct Potable Reuse
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Guidance sets the stage for implementation of potable reuse
• Prohibition has been removed
• Flexibility in meeting performance standards
• CA or TX approach
• Strong emphasis on Technical, Managerial, and Financial Capacity
• Source control (yes, for sewage collection systems)
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Pathogens& Trace Organic
Compounds
Treatment
Risk Mitigation
Public Acceptance
What do you need to do to make drinking water out of sewage?
Credit to Andy Salveson
Carollo Engineers
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Overall Goal: How do we make DPR safe? • Research Addresses Two Key Questions:
• What level of treatment must we achieve?
• How can we achieve that level of treatment?
Adenovirus Cryptosporidium fluoxetine
NDMA
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Public health goals for DPR
• CDPH for IPR (GW replenishment):12 / 10 / 10
• 12-log virus
• 10-log Giardia and Crypto reduction
• WRRF 11-02: 12 / 10 / 9• 12-log enteric virus
• 10-log Crypto (Giardia implied)
• 9-log bacteria
• Both:• Requirements for trace chemicals
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If you address the pathogens, you will address the trace organic chemicals
Treatment Train Virus CryptoTotal
Coliform
15 12 18
15 13 18
14 11 16
14 11 16
13 11 16
GOALS 12 10 9
MF RO UV/H2O2Cl2CAS
UF O3 BAF UVCAS
O3CAS BAF UF UV
O3CAS BAF UVMF
CAS O3 MF RO UV/H2O2
From raw wastewater to potable water
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But what if a process fails?
Treatment Train Virus CryptoTotal
Coliform
15 12 18
15 13 18
14 11 16
14 11 16
13 11 16
GOALS 12 10 9
MF RO UV/H2O2Cl2CAS
UF O3 BAF UVCAS
O3CAS BAF UF UV
O3CAS BAF UVMF
CAS O3 MF RO UV/H2O2
From raw wastewater to potable water
X X 9 X 6 X 12
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Implications of DPR
• Water quality monitoring equipment
• Lots of flexibility in treatment train – performance based
• Treatment simulation (digital copy)
• Artificial intelligence / machine learning
• “Sewer-shed” as a water source• Ramps up pre-treatment
standards• Disease detection
Credit to Dan Gerrity
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PFAS
Credit to Eva Steinle-Darling,
Carollo Engineers
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PFAS = Per- and Polyfluoro Alkyl Substances are everywhere!
• Stain repellant
• Flame resistant
• Non-stick
• Water resistant
• Good for coatings
Unique Properties of PFAS
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PFAS are everywhere!
https://www.ewg.org/interactive-maps/2019_pfas_contamination/map/
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Regulatory activity implies lower standards on the horizon
Drinking Water Standard Units PFOA PFOS PFHxS PFNA
2009 USEPA Provisional Health Advisory ppt 400 200
2016 USEPA Health Advisory(1) ppt 70 (combined) -- --
2018 California Notification Level (NL) ppt 14 13 -- --
Equivalent value based on 2018 ATSDR
MRL(2)ppt 11 7 74 11
1. When both PFOA and PFOS are present in drinking water, combined levels are not to exceed 70 ppt.
2. Equivalent values calculated using the ATSDR MRLs and the same methodology that was used to determine the 2016 Health Advisory levels
for PFOA and PFOS. These are not the same methods used to calculate MCLs.
Almost 10x
reduction
Another
~3x lower
More to
come??
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States’ regulatory activities accelerate each other Legend
Enforceable (& more)
Vermont –
Enforceable: MCL sum of PFOA, PFOS, PFHxS, PFHpA, and PFNA at 20 ppt.
Guidance: Sum of PFOA, PFOS, PFHxS, PFHpA, and PFNA at 10 ppt.
New Jersey –
Enforceable: MCL for PFNA at 13 ppt.
Proposed: MCL for PFOA and PFOS at 14 and 13 ppt respectively.
Guidance: PFOA, PFOS and PFNA at 10, 10 and 13 ppt respectively.
Colorado – El Paso County
PFOA + PFOS ≤ 70 ppt.
Michigan –
PFOA + PFOS ≤ 70 ppt.
Alaska –
Enforceable: PFOA and PFOS at 400
ppt, respectively.
Proposed: Sum of PFOA, PFOS, PFNA,
PFHpA, and PFHxS at 70 ppt, and PFBS
at 400,000 ppt.
Guidance: PFOA + PFOS ≤ 70 ppt.
New York –
MCL for PFOA and PFOS at
10 ppt respectively.
Nebraska –
PFOA + PFOS ≤ 70 ppt.
North Carolina –
PFOS ≤ 2000 ppt.
Texas –
PFOA, PFOS, PFNA,
PFHxS, PFHpA, PFBS
and PFBA at 290, 560,
290, 93, 560, 34,000
and 71,000 ppt,
respectively.
Oregon –
PFOA, PFOS,
PFNA and PFHpA
at 24, 300, 1 and
300 ppt,
respectively.
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3333
States’ regulatory activities accelerate each other Legend
Enforceable (& more)
Enforceable Proposed
New Hampshire –
MCL for PFOA, PFOS, PFNA and PFHxS
at 38, 70, 23, and 85 ppt, respectively.
Vermont –
Enforceable: MCL sum of PFOA, PFOS, PFHxS, PFHpA, and PFNA at 20 ppt.
Guidance: Sum of PFOA, PFOS, PFHxS, PFHpA, and PFNA at 10 ppt.
New Jersey –
Enforceable: MCL for PFNA at 13 ppt.
Proposed: MCL for PFOA and PFOS at 14 and 13 ppt respectively.
Guidance: PFOA, PFOS and PFNA at 10, 10 and 13 ppt respectively.
Colorado – El Paso County
PFOA + PFOS ≤ 70 ppt.
Michigan –
PFOA + PFOS ≤ 70 ppt.
Massachusetts –
MCL for PFAS under development.
Alaska –
Enforceable: PFOA and PFOS at 400
ppt, respectively.
Proposed: Sum of PFOA, PFOS, PFNA,
PFHpA, and PFHxS at 70 ppt, and PFBS
at 400,000 ppt.
Guidance: PFOA + PFOS ≤ 70 ppt.
New York –
MCL for PFOA and PFOS at
10 ppt respectively.
Washington –
MCL for PFAS under
development.
Nebraska –
PFOA + PFOS ≤ 70 ppt.
North Carolina –
PFOS ≤ 2000 ppt.
Texas –
PFOA, PFOS, PFNA,
PFHxS, PFHpA, PFBS
and PFBA at 290, 560,
290, 93, 560, 34,000
and 71,000 ppt,
respectively.
Oregon –
PFOA, PFOS,
PFNA and PFHpA
at 24, 300, 1 and
300 ppt,
respectively.
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3434
States’ regulatory activities accelerate each other Legend
Enforceable (& more)
Enforceable Proposed
Guidance Only
California –
PFOA and PFOS NLs at 14 and 13 ppt,
respectively.
New Hampshire –
MCL for PFOA, PFOS, PFNA and PFHxS at 38,
70, 23, and 85 ppt, respectively.
Minnesota –
PFOA, PFOS, PFBA, PFBS, and
PFHxS at 35, 15, 7,000, 2,000,
and 47 ppt, respectively.
Vermont –
Enforceable: MCL sum of PFOA, PFOS, PFHxS, PFHpA, and PFNA at 20 ppt.
Guidance: Sum of PFOA, PFOS, PFHxS, PFHpA, and PFNA at 10 ppt.
New Jersey –
Enforceable: MCL for PFNA at 13 ppt.
Proposed: MCL for PFOA and PFOS at 14 and 13 ppt respectively.
Guidance: PFOA, PFOS and PFNA at 10, 10 and 13 ppt respectively.
Colorado – El Paso County
PFOA + PFOS ≤ 70 ppt.
Michigan –
PFOA + PFOS ≤ 70 ppt.
Massachusetts –
MCL for PFAS under development.
Alaska –
Enforceable: PFOA and PFOS at 400
ppt, respectively.
Proposed: Sum of PFOA, PFOS, PFNA,
PFHpA, and PFHxS at 70 ppt, and PFBS
at 400,000 ppt.
Guidance: PFOA + PFOS ≤ 70 ppt.
New York –
MCL for PFOA and PFOS at 10
ppt respectively.
Washington –
MCL for PFAS under
development.
Maine –
PFOA + PFOS ≤ 70 ppt.
Connecticut –
Sum of PFOA, PFOS, PFNA,
PFHxS and PFHpA at 70 ppt.
Nebraska –
PFOA + PFOS ≤ 70 ppt.
Pennsylvania –
PFOA + PFOS ≤ 70 ppt.
North Carolina –
PFOS ≤ 2000 ppt.
Texas –
PFOA, PFOS, PFNA,
PFHxS, PFHpA, PFBS
and PFBA at 290, 560,
290, 93, 560, 34,000
and 71,000 ppt,
respectively.
Delaware –
PFOA + PFOS ≤ 70 ppt,
PFBS ≤ 40 ppt.
Wisconsin –
Groundwater
Advisory levels for
PFAS under
development.
Rhode Island –
PFOA + PFOS ≤ 70 ppt.
Oregon –
PFOA, PFOS,
PFNA and PFHpA
at 24, 300, 1 and
300 ppt,
respectively.
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PFAS are not just a groundwater contamination issue…
From: https://www.nacwa.org/docs/default-source/conferences-events/2018-pretreatment/18pret-m-rainey.pdf?sfvrsn=2
0
5
10
15
20
25
30
35
40F
iltere
d E
fflu
ent P
FA
A (
ng/L
)
PFAS in WW Effluent
Compilation of results from six sample events at Carollo’s DPR demonstration study in Altamonte Springs,
Florida. Similar results seen in Carollo’s evaluation of the DPR facility in Big Spring, Texas.
PFAS in Biosolids
On July 12, 2019 the US House of Representatives passed legislation that could:
1. Trigger CERCLA (Superfund) liability for biosolids containing PFAS.
2. Add “all PFAS” to the Clean Water Act toxic pollutants list, requiring establishment of effluent limits.See: https://www.nacwa.org/news-publications/clean-water-current-archives/clean-water-current/2019/07/17/
pfas-legislation-passes-house-nacwa-to-push-for-changes?utm_source=Real%20Magnet&utm_medium=email&utm_campaign=143336321
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Our treatment options for PFAS
are limited
Ion Exchange
(IX)
Carbon Adsorption
(GAC)
Reverse Osmosis
(RO or NF)
Other Options…?
?
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Implications of PFAS
• Moving target
• Treatment technology• GAC, IX, RO
• New?
• Monitoring equipment
• Recharge & recovery
• Driver for DPR
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The Implications to WWEMA Members
• Treatment• Desalination
• MF/RO + AOP
• Ozonation/Biofiltration + AOP
• Carbon Adsorption (GAC)
• Ion Exchange
• Anaerobic treatment
• Management• More wells
• More recharge
• Decentralized & on-site
• Real time monitoring
• Data analytics & enterprise systems
• Augmentation projects
• Redundancy & resiliency• Regional programs
• Interconnections