HomeMy WebLinkAboutPresentation - #05PFAS Briefing to
Santa Ana
City Council
1^ A /.
City Council Meeting
September 21, 2021
Item 2
Nabil Saba, P.E.
Executive Director,
Public Works Agency
City of Santa Ana
Michael R. Markus, P.E., D.WRE,
BCEE, F.ASCE
General Manager,
Orange County Water District
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• - -I Water Users
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4-
1 TFR n1Si
PFAS
Oxygen
Hydrogen
Fluorine
PFAS = Per- and Polyfluoroalkyl Substances (family of 1,OOOs of chemicals)
• Outdoor textiles &
sporting equipment
• Ski & snowboard
waxes
• Hydraulic fluids
• Firefighting
equipment
• Paper & packaging
• Clothing & carpets
• Non-stick cookware
• Cleaning agents &
fabric softeners
• Paints, varnishes,
dyes & inks
• Pesticides &
herbicides
• Personal care
products
• Medical products
• Adhesives
Response Level:
Threshold at which
state recommends
water not served to
the public without
treatment or blending
Current Response
Levels for PFAS (Feb.
2020):
PFOA = 10 parts per
trillion (ppt)
PFOS = 40 ppt
i
State and Federal
EPA have separately
begun process to
establish enforceable
Maximum
Contaminant Levels
(MCLs)
Eleven water suppliers in the
OCWD service area are
currently impacted by
Response Levels
Up to - 1/3 of normal
groundwater basin
production unable to be
served by following state
recommendations
Temporary increase in the
use of treated imported
surface water
• OCWD's board of directors implemented a PFAS treatment policy in
November 2019
• Enables construction of treatment facilities for impacted water
agencies
• Funding 100% of design and construction costs
• Operation and maintenance costs shared 50/50 with the retail water
agency.
• OCWD supporting design/construction of 35 PFAS treatment
systems for impacted water retailers, including City of Santa Ana
• OCWD launched nation's largest PFAS pilot program
• OCWD + 10 impacted retail agencies filed suit against 3M, DuPont,
and others (Dec. 2020)
• Six Santa Ana wells shut down
• Water supply switched to treated imported water
• Working with OCWD to plan/design/construct PFAS Treatment
Systems featuring Ion Exchange (IX) for its wells
• IX is a well -established water treatment technology and pilot testing
by OCWD established its effectiveness for PFAS removal
O .t
Treatment ~
To
Groundwater Disinfection Distribution
Wells 13 System
GIn '
Ion -Exchange Chlorine To
roundwaterIn In CM Distribution
Wells 5 µm Filters Treatment Disinfection System
Treatment Facility Rendering
r
4 t
Questions?
Orange County Water District
18700 Ward Street, Fountain Valley, CA 92708
(714) 378-3305
www.00WD.com