HomeMy WebLinkAboutItem 3 PPP 03-11-2020 Admin Committee- PFASPFAS
Informational Update
Lan Wiborg, Director of Environmental Services
Administration Committee
March 11, 2020
PFAS
(per-and poly-fluoroalkyl substances)
•Class of over 4,000 man-made
chemicals
•Extremely stable and persistent
•Upside: Stable, versatile, water/oil
resistant
•Downside: Persistent in environment
and body
PFAS
Contaminant of Emerging Concern (CEC)
CECs may or may not be regulated but pose some
health or environmental concerns
Some Examples CECs Timeline
PCBs 1970s-1980s
DTC & NDMA 1990s-2000s
1,4-dioxane 2000s-2010s
Microplastics 2010s-
PFAS 2010s-
PFAS
In Everyday Lives
Source: Australian Department of Defense
Examples
Liquid –surfactants, AFFF, cleansers, industry
Coatings –carpets, textiles, waxes, paints
Materials –clothing, food package, pans, floss
PFAS
Potential Human Health Effects
Carcinogenicity Kidney and testicular cancer
Immunotoxicity Ulcerative colitis, immune dysregulation
Endocrine toxicity Thyroid disease
Reproductive toxicity Pregnancy-induced hypertension
Cardiovascular toxicity Increased serum cholesterol
PFAS
Reducing Exposure
Drinking water and wastewater systems do not
produce or use PFAS chemicals
US
Phase-out
1999-2014
Blood Level
2018 Background levels
(ppt)
Household Dust Foundation
Cosmetic
PFOS 2002 70%
PFOA 2015 84% 10,000-50,000 2,370,000
Human Blood Levels
Decreasing Trend Following Phase-out
* geometric mean (CDC 2017)
USEPA’s PFAS Action Plan
Released in February 2019 (Source: SWRCB)
State Action: Drinking Water
Source: SWRCB
State Action: AB 756
Source: SWRCB
Authorizes SWRCB to order public water systems to monitor, report, notify the public and/or remove water sources that exceed the NLs/RLs
Upcoming State Actions
Source: SWRCB
PFAS
Potential Impact to OCSD
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
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
Key Messages
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
3.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
Questions?
Comparison (Source NEBRA)
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