Colorado s approach to addressing PFAS contamination S eptember - - PowerPoint PPT Presentation

Colorado’ s approach to addressing PFAS contamination

S eptember 16, 2019 David Dani

• Family of t housands of human-made subst ances.
• Carbon fluorine bond - one of t he st rongest in nat ure, so no

nat ural degradat ion.

• Used in product s t hat resist heat , oil, st ains, grease and wat er.

○

Class B fire-fight ing foams.

○

Raincoat s, shoes, popcorn bags, pizza boxes, Teflon pans.

• Found in 99%
• f people’ s blood.
• Primary concern is drinking wat er. People drinking cont aminat ed

wat er t end t o have high PFAS blood levels.

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Per- and polyfluoroalkyl substances (PFAS )

PFAS and health

• High cholesterol.
• Liver damage.
• Decrease vaccine effectiveness.
• Asthma.
• Thyroid disease.
• Decrease fertility.
• Pre-eclampsia.
• Lower birth weight.
• Possible kidney & testicular cancer.

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PFAS contamination impacting water supplies

EPA PFAS drinking water health advisory (non-regulatory)

PFOS + PFOA < 70 ng/ L

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2019 EPA PFAS Action Plan

• Proposing regulat ory det erminat ion for PFOA and PFOS

in 2019.

• Det ermining if regulat ion is appropriat e for broader class of PFAS

.

• Including a larger group of PFAS

in UCMR5.

• Working t hrough regulat ory development process for list ing PFOA

and PFOS as CERCLA hazardous subst ances.

• Finalizing t oxicit y assessment s for PFBS

and GenX in 2019.

• Developing draft t oxicit y assessment s for PFBA, PFHxA, PFHxS

, PFNA, and PFDA in 2020.

• Developing guidance for cleanup of cont aminat ed groundwat er.
• Developing new t ools t o charact erize PFAS

in t he environment and mat erials t o communicat e about PFAS .

CDPHE PFAS Action Plan

• Break chain of exposure.
• Expanded monitoring.
• Develop inventory of contaminated sites.
• Identify impacted drinking water sources.
• Regulatory authority.

6 Journal of Exposure Science & Environmental Epidemiology volume 29, pages131–147 (2019)

CDPHE actions to address the issue

• Collaborat ive response wit h impact ed ent it ies, local healt h

agency and EPA t o conduct sampling, not ify public, reduce risk.

• Work wit h drinking wat er providers t o develop a response t oolbox.
• Incorporat e PFAS

in source wat er prot ect ion planning.

• Invent ory pot ent ial PFAS

sources in st at e and impact ed wat ers – survey of fire dist rict s (HB19-1279).

• CDOT Aeronaut ics has 400k t o purchase equipment for airport s t o

t est PFAS syst ems wit hout discharging.

• PFOA and PFOS

sit e-specific groundwat er standards for aquifer in S ecurit y, Widefield, Fount ain area.

• Developing BMPs t o help fire dist rict s and ot her PFAS

users.

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PFAS Narrative Policy Workgroup Obj ectives

• Narrat ive provisions of Regulat ions No. 31 and 41 t o address PFAS

cont aminat ion in Colorado for surface wat er and groundwat er.

• S

creening levels t hat will be used t o ident ify areas t hat will require furt her monit oring t o assess cont aminat ion levels.

• Thresholds t hat will be used t o est ablish t he need for regulat ory

act ion.

• How t he Wat er Qualit y Cont rol Division will use t he t hresholds t o

det ermine whet her t o include effluent limit at ions for PFAS in permit s.

• First workgroup meet ing is S

ep 17 at 9:30 at CDPHE. For more informat ion go t o: colorado.gov/ cdphe/ PFCS

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Thank you! What are your questions?

David Dani david.dani@state.co.us 303-692-3605

More informat ion available at colorado.gov/ cdphe/ PFCS