HomeMy WebLinkAboutItem 7 PPP 03-04-2020 Operations Committee - PFAS PFAS
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Informational Update
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' Lan Wiborg, Director of Environmental
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Operations Committee
March 4 2020
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PFAS
(per- a • • • • • substances)
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PFOA -1peffluorooclanoic acid
• Extremely stable and persistent
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\ • Downside: Persistent in environment
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PFOS -1pedluorooctanesulfonic acid
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-PFAS
�ate- CContaminant of Emerging Concern (CEC)
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CECs may or may not be regulated but pose some
health or environmental concerns
Some Examples CECs w Timeline
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PCBs 1970s-1980s
DTC & N D MA 1990s-2000s
1 A-dioxane 2000s-2010s
Microplastics 2010s-
PFAS 2010s-
PFAS ►V
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In Everyday Lives
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Examples
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Coatings — carpets, textiles, waxes, paints
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Materials — clothing, food package, pans, floss
Sources
PFAS
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Source: Australian Department of Defense
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Potential
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➢ Carcinogenicity Kidney and testicular cancer
➢ I m m u notoxicity Ulcerative colitis, immune dysregulation
➢ Endocrine toxicity Thyroid disease
➢ Reproductive toxicity Pregnancy-induced hypertension
➢ Cardiovascular toxicity Increased serum cholesterol
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PFAS
Reducing Exposure
2018 Background levels
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PFOS 2002 70%
P FOA 2015 84% 10,000-50,000 25 370,000
Drinking water and wastewater systems do not
produce or use PFAS chemicals
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USEPA's PFAS Action Plan =y
Released in February 2019 (Source: SWRCB) "
TOXICOLOGY DRINKING WATER MONITORING CLEANUP
Develop toxicity thresholds Consider MCLs & broader Enhanced nationwide HAS Designate PFOS & PFOA as
for 21 PFAS PFAS regulation drinking water monitoring hazardous substance&
in next Unregulated develop interim
Contaminant Monitoring groundwater cleanup
qF Rule (UCMR4) recommendations
CALIFORNIA qqk
Water Boards
State A Drinking Water
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Source: SWRCB
July 2019
2013-2015 June 2018 • California Assembly Bill 756 October 2019
• State Water Board • Requires notification to • Water Quality
• USEPA Third Unregulated Interim Notification Levels consumers for PFAS detected Investigative
Contaminant Monitoring Rule . PFOA: 14 ppt, PFOS: 13 ppt above NIL Orders to Chrome
(6,400 samples collected in CA) • Effective Jan 1, 2020 Plating Facilities
May 2016 February 2019 March/April 2019 August 2019 Februar2020
USEPA — USEPA — Water Quality Investigative Lower notification Lower
Lifetime Health PFAS Action Plan Orders to Landfills and Airports levels response levels
• Public Water System Sampling • PFOA: 5.1 ppt
Advisory of 70 ppt Orders adjacent to the Airports and • PFOA: 10 ppt
1 p PFOS: 6.5 ppt • PFOS: 40 t
Landfills pp
Action : AB 756 State
Source: SWRCB "
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January 2020 July/August 2020 Summer 2021 Fall 2022 Summer 2023
• AB 756 statute OEHHA initiates • OEHHA releases • Board Hearing • Water Board submits
changes become scientific peer final PHGs and on MCLs and regulation package to
effective review of draft responses to close of Office of Adrninistrative
PHGs comments comment period Law (OAL) for approval
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April/May 2020 Fall 2020 Summer 2022 Spring 2023 Fall 2023
OEHHA releases OEHHA releases p
• Water Board Board adoption • OAL approval,
•
draft PHGs for 2nd publicreleases draft review hearing on MCLs become
i public comment draft of PHGs for package and MCLs regulation MCLs effective
public comment begins public
comment period
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Water Boards , 27
Upcoming State Actions
Source: SWRCB -
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• Additional sampling outwards from impacted public water supply
wells
Q Focused watershed-based source & public water system
investigations
Sampling at Wastewater Treatment Facilities (influent, effluent, and
Enj biosolids)
6M Source investigations at Refineries and Bulk Terminals
I Integration of data from DoD and additional sampling of public
X® water system wells around impacted installations
QIdentify strategies for domestic well sampling in impacted areas
Data analysis and visualizations to inform the public and decision
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Potential Impact to OCSD WWII
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OCSD Current
Actions
• Communication
• Aligning messaging and resources with other agencies
• Engaging regulators, legislators, and community stakeholders
• Federal and state advocacy
• Participating in method development
• Participate in a CASA-led review of PFAS health effects
• Conducting industrial surveys in line with state's approach
• Evaluating screening levels for discharge requests
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OCSD Future Actions
• Coordinate PFAS management with other agencies
• Implement Policies & Standards (limits, conditions, etc.)
• Find , inspect, monitor, and permit potential sources
• Sample and analyze using EPA-approved methods
• Track and adapt to evolving federal/state regulations
• Optimize monitoring and reporting process
Ke Messages
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1 . PFAS are ubiquitous in our homes and environment
2. OCSD is committed to protecting the environment and
public health against the adverse impact of PFAS
I PFAS producers and heavy users are not the same as
`receivers'
4. Remove and treat PFAS at the source
5. Base regulation and response on sound science
6. Avoid risk transfer and unintended consequence
7. Need permanent disposal/sequestration options
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Foundation cosmetic 2,370 ppb PFOA
Pork liver in Taiwan 283 ppb PFOA
Dust in daycare center 142 ppb PFOA (median)
Household food waste 6 ppb all PFAS (mean)
US human blood serum (NHANES) 2 ppb PFOA (mean)
Control garden soil 0.36 ppb PFOA (median)
DDW Notification Levels 0.014 ppb PFOA; 0.013 PFOS