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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