Event Information

Share this event

Date and Time

Location

Location

Orange County Water District

18700 Ward Street

Fountain Valley, CA 92708

View Map

Refund Policy

Refund Policy

Contact the organizer to request a refund.

Eventbrite's fee is nonrefundable.

Event description
SCGS January Meeting: PFAS/PFOS with Jason Dadakis, P.G., C.HG, Orange County Water District

About this Event

Please join South Coast Geological Society for our monthly meeting on Monday, January 27th, 2020 from 6PM to 8PM at the Orange County Water District (18700 Ward Street, Fountain Valley, CA 92708). We are hosting Jason Dadakis, P.G., C.HG, Executive Director of Water Quality & Technical Resources who will present their topic on PFOS/PFAS.

Talk Title: PFAS in the Orange County Groundwater Basin: Occurrence, Regulation, and Impacts on Local Water Supply

Abstract: Per- and polyfluoroalkyl substances (PFAS) represent a large group of manmade chemicals originally developed in the 1940s. PFAS possess number of unique properties, including oil- and water resistance, resistance to degradation (due to their strong carbon-fluorine bonds), and surfactant-like characteristics. As such, PFAS have been manufactured for use in a wide variety of industrial and consumer applications. Two individual “long-chain” PFAS, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), have been phased out of USA and EU production due to concerns about their effects on human health and the environment. The widespread use of PFAS, both long-chain “legacy” compounds and newer “short-chain” replacements, coupled with their persistence has resulted in worldwide environmental occurrence in air, soil, and water. In the Orange County groundwater basin, the presence of PFAS was first documented by the Orange County Water District (OCWD) during the 2013-2015 federal Environmental Protection Agency (EPA) Unregulated Contaminant Monitoring Rule 3 (UCMR3) program. Subsequent testing by OCWD has helped define the extent of PFAS-impacted groundwater in the northcentral portion of the basin, likely reflective of the historical recharge of PFAS-impacted Santa Ana River surface water. Former and active military airfields in basin also represent sources of PFAS, due to these facilities’ use of aqueous film-forming foams (AFFF) to train for and fight Class B hydrocarbon fires. As the state of California continues to establish advisory drinking water guidelines (i.e., Notification and Response Levels) and to begin the development of enforceable standards (i.e., Maximum Contaminant Levels), OCWD is conducting both pilot wellhead treatment and engineering planning studies in support of local retail water agencies with PFAS-impacted groundwater supplies.

Speaker Information:

Jason Dadakis is the Executive Director of Water Quality and Technical Resources for Orange County Water District (OCWD) in Fountain Valley, California. There he oversees water quality monitoring, laboratory analysis, regulatory compliance, external independent review, and applied research in support of OCWD’s groundwater management activities and recycled water projects, including the Groundwater Replenishment System. Currently, he is the lead facililtator of a PFAS Workgroup comprised of local retail water agencies. Jason is a registered Professional Geologist (P.G.) and Certified Hydrogeologist (C.HG) in the State of California. He holds a B.A. in Earth Sciences from Dartmouth College and an M.S. in Hydrology from the University of Arizona.

Meeting Details:

6:00 PM - Social Hour

6:30 PM - Dinner Buffet

7:15 PM - Presentation

Meeting Cost: Members $20; Non-members $25; Students/Professors $10

Share with friends

Date and Time

Location

Orange County Water District

18700 Ward Street

Fountain Valley, CA 92708

View Map

Refund Policy

Contact the organizer to request a refund.

Eventbrite's fee is nonrefundable.

Save This Event

Event Saved