&EPA	Technical Fact Sheet -
Perfluorooctane Sulfonate (PFOS)
and Perfluorooctanoic Acid (PFOA)
United States
Environmental Protection
Agency
November 2017
TECHNICAL FACT SHEET - PFOS and PFOA
Introduction
This fact sheet, developed by the U.S. Environmental Protection Agency
(EPA) Federal Facilities Restoration and Reuse Office (FFRRO), provides a
summary of two contaminants of emerging concern, perfluorooctane
sulfonate (PFOS) and perfluorooctanoic acid (PFOA), including physical and
chemical properties; environmental and health impacts; existing federal and
state guidelines; detection and treatment methods; and additional sources of
information. This fact sheet is intended for use by site managers who may
address these chemicals at cleanup sites or in drinking water supplies and
for those in a position to consider whether these chemicals should be added
to the analytical suite for site investigations.
PFOS and PFOA are part of a larger group of chemicals called per- and
polyfluoroalkyl substances (PFASs). PFASs, which are highly fluorinated
aliphatic molecules, have been released to the environment through
industrial manufacturing and through use and disposal of PFAS-containing
products (Liu and Mejia Avendano 2013). PFOS and PFOA are the most
widely studied of the PFAS chemicals. PFOS and PFOA are persistent in the
environment and resistant to typical environmental degradation processes.
As a result, they are widely distributed across all trophic levels and are found
in soil, air and groundwater at sites across the United States. The toxicity,
mobility and bioaccumulation potential of PFOS and PFOA result in potential
adverse effects on the environment and human health.
What are PFOS and PFOA?	
~	They are human-made compounds that do not occur naturally in the
environment (ATSDR 2015; EPA 2009b).
~	PFOS and PFOA are fully fluorinated, organic compounds. They are the
two PFASs that have been produced in the largest amounts within the
United States (ATSDR 2015; EFSA 2008).
~	PFOS and PFOA are part of a subset of PFASs known as perfluorinated
alkyl acids (PFAAs).
Disclaimer: The U.S. EPA prepared this fact sheet using the most recent publicly-
available scientific information; additional information can be obtained from the source
documents. This fact sheet is not intended to be used as a primary source of
information and is not intended, nor can it be relied on, to create any rights enforceable
by any party in litigation with the United States. Mention of trade names or commercial
products does not constitute endorsement or recommendation for use.
At a Glance
~	Manmade chemicals not
naturally found in the
environment.
~	Fluorinated compounds that
repel oil and water.
~	Used in a variety of industrial
and consumer products, such
as carpet and clothing
treatments and firefighting
foams.
~	Extremely persistent in the
environment.
~	Known to bioaccumulate in
humans and wildlife.
~	Readily absorbed after oral
exposure. Accumulate
primarily in the blood serum,
kidney and liver.
~	Toxicological studies on
animals indicate potential
developmental, reproductive
and systemic effects.
~	Health-based advisories or
screening levels have been
developed by EPA and state
agencies.
~	EPA has not issued a
Maximum Contaminant Level
(MCL) for drinking water.
~	Standard analytical methods
use high-performance liquid
chromatography coupled with
tandem mass spectrometry.
~	Resistant to most chemical
and microbial conventional
treatment technologies. Most
common groundwater
treatment method is extraction
and filtration through granular
activated carbon filters.
United States	Office of Land and Emergency	EPA 505-F-17-001
Environmental Protection Agency	Management (5106P)	November 2017
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Technical Fact Sheet - PFOS and PFOA
PFAS Chemistry
~	The PFAS group is made up of two subgroups: perfluoroalkyl substances and polyfluoroalkyl substances.
~	PFOS and PFOA are perfluoroalkyl substances (compounds for which all hydrogens on all carbons
(except for carbons associated with functional groups) have been replaced by fluorines).
~	Polyfluoroalkyl substances are compounds for which some hydrogens (but not all) on the carbon atoms
have been replaced by fluorines.
~	PFASs are extremely persistent in the environment primarily because the chemical bond between the
carbon and fluorine atoms is extremely strong and stable.
Source: Buck and others 2011
PFOS and PFOA can also be formed by
environmental degradation or by metabolism in
larger organisms from a large group of related
PFASs or precursor compounds (ATSDR 2015;
UNEP2006).
PFOS and PFOA are stable chemicals that are
comprised of chains of eight carbons. Because of
their unique ability to repel oil and water, these
chemicals have been used in: surface protection
products such as carpet and clothing treatments;
coatings for paper, cardboard packaging and
leather products; industrial surfactants,
emulsifiers, wetting agents, additives and
coatings; processing aids in the manufacture of
fluoropolymers such as nonstick coatings on
cookware; membranes for clothing that are both
waterproof and breathable; electrical wire casing;
fire and chemical resistant tubing; and plumbing
thread seal tape (ATSDR 2015).
Through 2001, PFOS and other PFAS chemicals
were used in the manufacture of aqueous film
forming foam (AFFF), which is used to extinguish
liquid hydrocarbon fires (ASTSWMO 2015; EPA
2016f; DoD SERDP 2014; Place and Field 2012).
Manufacturers of AFFF in the United States now
use PFASs other than PFOS; however, existing
stocks of PFOS-based AFFF remain in use.
By 2002, the primary U.S. manufacturer of PFOS
voluntarily phased out production of PFOS. In
2006, eight major companies in the PFASs
industry voluntarily agreed to phase out production
of PFOA and PFOA-related chemicals by 2015.
EPA is concerned about a limited number of
ongoing uses of PFOA-related chemicals, which
are still available in existing stocks and from
companies not participating in the PFOA
Stewardship Program. In addition, exposure could
occur via goods imported from countries where
PFOS and PFOA are still used (EPA 2016b,
2016c, 20161).
Exhibit 1: Physical and Chemical Properties ol PFOS and PFOA (ATSDR 2015; EFSA 2008; EPA 2016b,
2016c)
Property
PFOS (Free Acid)
PFOA (Free Acid)
Chemical Abstracts Service (CAS) number
1763-23-1
335-67-1
Physical description (physical state at room
temperature and atmospheric pressure)
White powder (potassium salt)
White powder/
waxy white solid
Molecular weight (g/mol)
500
414
Water solubility at 25°C (mg/L)
680
9.5 X 103
Melting point (°C)
No data
54
Boiling point (°C)
258-260
192
Vapor pressure at 25°C (mm Hg)
0.002
0.525
Organic carbon partition coefficient (Koc)
2.57
2.06
Henry's law constant (atm-m3/mol)
Not measurable
Not measurable
Abbreviations: g/mol - grams per mole; mg/L - milligrams per liter; °C - degree Celsius; mm Hg - millimeters of mercury;
atm-m3/mol - atmosphere-cubic meters per mole
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Technical Fact Sheet - PFOS and PFOA
Existence of PFOS and PFOA in the environment
During manufacturing processes, PFASs were
released to the air, water and soil in and around
manufacturing facilities (ATSDR 2015). Recently,
PFOS and PFOA contamination has also been
observed in facilities using PFAS products to
manufacture other products (secondary
manufacturing facilities).
PFOS has been detected in surface water and
sediment downstream of production facilities and
in wastewater treatment plant effluent, sewage
sludge and landfill leachate at a number of cities in
the United States (OECD 2002; Oliaei and others
2013).
The environmental release of PFOS-based AFFF
may also occur from tank and supply line leaks,
use of aircraft hangar fire suppression systems,
firefighting training activities, and use at airplane
crash sites (DoD SERDP 2014).
PFOS and PFOA products often contain residuals
from manufacturing and formulation that are
PFASs. PFOS- and PFOA-based products often
contain impurities and residuals which may be
precursors to PFOS and PFOA. Biological and
abiotic environmental processes have been shown
to transform these precursors into PFOS and
PFOA (Liu and Mejia Avendano 2013; Buck and
others 2011; Conder and others 2010).
In general, PFOS and PFOA are stable in the
environment and resist typical environmental
degradation processes. As a result, these
chemicals are persistent in the environment
(OECD 2002; ATSDR 2015).
PFOS and PFOA are detected in environmental
media and biota in many parts of the world,
including oceans and the Arctic, indicating that
long-range transport is possible (ATSDR 2015).
The wide distribution of perfluoroalkyl substances,
such as PFOS, in higher trophic level organisms is
strongly suggestive of the potential for
bioaccumulation and/or bioconcentration (EPA
2015; UNEP2006).
PFOS has been shown to accumulate to levels of
concern in fish. The estimated bioconcentration
factor in fish ranges from 1,000 to 4,000 (EFSA
2008; MDH 2017a). PFOA has been shown to
bioaccumulate in air breathing species, including
humans, but not in fish (Vierke and others 2012).
What are the routes of exposure and the potential health effects of PFOS
and PFOA?
~	Studies have found PFOS and PFOA in the blood
samples of the general human population and
wildlife, indicating that exposure to the chemicals
is widespread (ATSDR 2015; EPA 2015).
~	Reported data indicate that blood serum
concentrations of PFOS and PFOA are higher in
workers and individuals living near facilities that
use or produce PFASs than for the general
population (ATSDR 2015; EPA 2009b).
~	Potential exposure pathways include ingestion of
food and water, use of consumer products or
inhalation of PFAS-containing particulate matter
(e.g., soils and dust) or vapor phase precursors
(ATSDR 2015; EPA 2009b).
~	PFOA and PFOS have been found in drinking
water supplies, typically associated with
manufacturing locations, industrial use or disposal.
~	Human epidemiological studies found associations
between PFOA exposure and high cholesterol,
increased liver enzymes, decreased vaccination
response, thyroid disorders, pregnancy-induced
hypertension and preeclampsia, and cancer
(testicular and kidney) (EPA 2016e).
~	Human epidemiological studies found associations
between PFOS exposure and high cholesterol and
adverse reproductive and developmental effects
(EPA 2016d).
~	PFOS and PFOA are toxic to laboratory animals,
producing reproductive, developmental and
systemic effects in laboratory tests (Austin and
others 2003; EPA 2016d, 2016e; Post and others
2012).
~	EPA found that there is suggestive evidence that
PFOS and PFOA may cause cancer (EPA 2016d,
2016e).
~	The American Conference of Governmental
Industrial Hygienists (ACGIH) has classified PFOA
as a Group A3 carcinogen - confirmed animal
carcinogen with unknown relevance to humans
(ATSDR 2015).
~	The World Health Organization's International
Agency for Research on Cancer has found that
PFOA is possibly carcinogenic to humans (Group
2B) (IARC 2016).
~	In 2009, the Stockholm Convention on Persistent
Organic Pollutants added PFOS to Annex B,
restricting its production and use. PFOA was
proposed for listing in 2015 (Stockholm
Convention 2016).
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Technical Fact Sheet - PFOS and PFOA
Are there any federal and state guidelines and health standards for PFOS
and PFOA?
EPA derived oral non-cancer reference doses
(RfDs) of 0.00002 mg/kg/day for both PFOS and
PFOA (EPA 2016d, 2016e). The RfD is an
estimate of the daily exposure level that is likely to
be without harmful effects over a lifetime.
In May 2016, EPA established drinking water
health advisories of 70 parts per trillion (0.07
micrograms per liter (|jg/L)) for the combined
concentrations of PFOS and PFOA. Above these
levels, EPA recommends that drinking water
systems take steps to assess contamination,
inform consumers and limit exposure. The health
advisory levels are based on the RfDs (EPA
2016b, 2016c).
EPA found that there are insufficient data to derive
inhalation non-cancer reference concentrations
(RfCs) for PFOS and PFOA (EPA 2016d, 2016e).
For PFOA, EPA estimated a cancer slope factor of
0.07 (mg/kg/day)1. Based on this slope factor,
EPA calculated that a PFOA drinking water
concentration of 0.5 |jg/L would correspond to a
one-in-a-million increased risk of cancer (EPA
2016c, 2016e).
EPA has not issued a Maximum Contaminant
Level (MCL) for drinking water.
Various states have established drinking water
and groundwater guidelines, including the
following:
State
Guideline (|jg/L)
Source
PFOA
PFOS
Delaware
0.4
0.2
DNREC 2016
Maine
0.13
0.56
MDEP2016
Michigan
0.42
0.011
MDEQ 2015
Minnesota
0.035
0.027
MDH 2017b
New Jersey
0.04
NA
NJDEP 2016
North Carolina
2
NA
NCDEQ 2013
Texas
0.3
0.6
TCEQ2016
Vermont
0.02
NA
VTDEC 2016
Some states have fish consumption advisories for
certain water bodies where PFOS has been
detected in fish (MDH 2017c; MDHHS 2016).
PFOS and PFOA are included on the fourth
drinking water contaminant candidate list, which is
a list of unregulated contaminants that are known
to, or anticipated to, occur in public water systems
and may require regulation under the Safe
Drinking Water Act (EPA 2016a).
What detection and site characterization methods are available for PFOS
and PFOA?
~	Detection methods for PFOS and PFOA are
primarily based on high-performance liquid
chromatography (HPLC) coupled with tandem
mass spectrometry (MS/MS) (ATSDR 2015).
~	EPA Method 537, Version 1.1, is a liquid
chromatography/tandem mass spectrometry (LC-
MS/MS) method used to analyze PFOS, PFOA
and other PFAAs in finished drinking water. While
most sampling protocols for organic compounds
require sample collection in glass, this method
requires plastic sample bottles because PFASs
are known to adhere to glass (ATSDR 2015; EPA
2009a). In addition, the method notes that
analytes are found in common lab supplies and
equipment such as PTFE (polytetrafluoroethylene)
products, LC solvent lines, solid phase extraction
sample transfer lines, methanol and aluminum foil
(EPA 2009a).
~	Currently, there are no standard EPA methods for
analyzing PFASs in groundwater, surface water,
wastewater or solids. EPA is developing analytical
methods for these media. EPA expects to have
draft methods for water and solids by fall 2017.
EPA will also develop standard operating
procedures for field sampling (EPA 2017).
~	ASTM has published standards for analyzing
PFAAs in soil (D7968-14) and in water, sludge,
influent, effluent and wastewater (D7979-15). Both
standards use LC-MS/MS (ASTM 2014, 2015).
These methods have not been multi-lab validated.
~	The available detection methods report
sensitivities of low picograms per cubic meter
(pg/m3) levels in air, high picograms per liter (pg/L)
to low ng/L levels in water, and high picograms per
gram to low ng/g levels in soil (ATSDR 2015).
~	Experimental techniques are available to measure
PFASs in air samples. Some studies have used
gas chromatography mass spectrometry (GC/MS)
to measured PFASs in air samples (ATSDR
2015). In addition, some precursor chemicals and
transformation products are measured by
GC/MS/MS or LC/MS/MS (Liu and Mejia
Avendano 2013). An oxidative technique has been
proposed to estimate precursor levels by
LC/MS/MS (Houtz and Sedlak2012).
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Technical Fact Sheet - PFOS and PFOA
Researchers are developing a new analytical
method that uses particle induced gamma
emission (PIGE) to quickly and non-destructively
detect the presence of PFASs in consumer
products and other solid materials (National
Science Foundation 2015).
What technologies are being used to treat PFOS and PFOA?
Chapter 10 of the PFOS and PFOA health
advisories discuss the performance of common
drinking water technologies to treat these
chemicals (EPA 2016b, 2016c). In general, PFOS
and PFOA resist most conventional chemical and
microbial treatment technologies. Technologies
with demonstrated effectiveness include granular
activated carbon sorption and ion exchange resins
(EPA 2016b, 2016c).
PFAAs can be formed when precursor chemicals
are transformed in the environment or in the body
(EPA 2016b, 2016c). Therefore, if precursors are
not addressed during remediation, overtime they
may be transformed to PFAAs, such as PFOS and
PFOA. The presence of other contaminants,
including PFAS precursors, can also impact
design and performance of remedial technologies.
The most common groundwater treatment is
extraction and filtration through granular activated
carbon. However, because PFOA and PFOS have
moderate adsorbability, the design specifics are
very important in obtaining acceptable treatment
(EPA 2016b, 2016c). Other potential adsorbents
include: ion exchange resins, organo-clays, clay
minerals and carbon nanotubes (EPA 2016b,
2016c; Espana and others 2015). Evaluation of
these sorbents needs to consider regeneration, as
the cost and effort required may be substantial
(EPA 2016b, 2016c).
Other ex situ treatments including nanofiltration
and reverse osmosis units have been shown to
remove PFASs from water (EPA 2016b, 2016c).
Incineration of the concentrated waste would be
needed for the complete destruction of PFASs
(MDH 2008; Vecitis and others 2009).
Research into other treatment approaches for
PFOS and PFOA in groundwater is ongoing (DoD
SERDP 2016).
One soil management approach is excavation and
off-site disposal. Capping may also be an option.
High-temperature incineration can also be used to
destroy PFOS and PFOA (ASTSWMO 2015).
Stabilization methods for PFAS-contaminated soil
may be effective (Kupryianchyk and others 2016).
Where can I find more information
~	ATSDR. 2015. "Draft Toxicological Profile for
Perfluoroalkyls."
www.atsdr.cdc.qov/toxprofiles/tp200.pdf
~	ASTM. 2014. "D7968-14, Standard Test Method
for Determination of Perfluorinated Compounds in
Soil by Liquid Chromatography Tandem Mass
Spectrometry (LC/MS/MS)." www.astm.org
~	ASTM. 2015. "D7979-15e1, Standard Test Method
for Determination of Perfluorinated Compounds in
Water, Sludge, Influent, Effluent and Wastewater
by Liquid Chromatography Tandem Mass
Spectrometry (LC/MS/MS)." www.astm.org
~	Association of State and Territorial Solid Waste
Management Officials (ASTSWMO). 2015.
Perfluorinated Chemicals (PFCs):
Perfluorooctanoic Acid (PFOA) & Perfluorooctane
Sulfonate (PFOS): Information Paper, clu-
in.org/download/contaminantfocus/pops/POPs-
ASTSWMQ-PFCs-2015.pdf
~	Austin, M.E., Kasturi, B.S., Barber, M., Kannan,
K., MohanKumar, P.S., and S.M. MohanKumar.
it PFOS and PFOA?	
2003. "Neuroendocrine Effects of Perfluorooctane
Sulfonate in Rats." Environmental Health
Perspectives. Volume 111 (12). Pages 1485 to
1489.
~	Backe, W.J., Day, T.C., and J.A. Field. 2013.
"Zwitterionic, Cationic, and Anionic Fluorinated
Chemicals in Aqueous Film Forming Foam
Formulations and Groundwater from U.S. Military
Bases by Nonaqueous Large-Volume Injection
HPLC-MS/MS." Environmental Science and
Technology. Volume 47. Pages 5226 to 5234.
www.ncbi.nlm.nih.gov/pubmed/23590254
~	Buck, R.C., Franklin, J., Berger, U., Conder, J.M.,
de Voogt, P., Jensen, A.A., Kannan, K., Mabury,
S.A., and S.P. van Leeuwen. 2011. "Perfluoroalkyl
and Polyfluoroalkyl Substances in the
Environment: Terminology, Classification, and
Origins." Integrated Environmental Assessment
and Management. Volume 7 (4). Pages 513 to
541.
onlinelibrarv.wilev.com/doi/10.1002/ieam.258/full
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Technical Fact Sheet - PFOS and PFOA
Where can I find more information about PFOS and PFOA? (continued)
~	Conder, J.M., Wenning, R.J., Travers, M., and M.
Blom. 2010. "Overview of the Environmental Fate
of Perfluorinated Compounds." Network for
Industrially Contaminated Land in Europe
(NICOLE) Technical Meeting. 4 November 2010.
www.nicole.org/uploadedfiles/nicole-brussels-
november2010.pdf
~	Delaware Department of Natural Resources and
Environmental Control (DNREC). 2016. "Guidance
for Notification Requirements."
www.dnrec.delaware.qov/dwhs/sirb/Documents/N
otification%20Guidance.pdf
~	Espana, V.A., Mallavarapu, M., and R. Naidu.
2015. "Treatment Technologies for Aqueous
Perfluorooctanesulfonate (PFOS) and
Perfluorooctanoate (PFOA): A Critical Review with
an Emphasis on Field Testing." Environmental
Technology & Innovation. Volume 4. Pages 168 to
181.
~	European Food Safety Authority (EFSA). 2008.
"Perfluorooctane Sulfonate (PFOS),
Perfluorooctanoic Acid (PFOA) and Their Salts."
The EFSA Journal. Volume 653. Pages 1 to 131.
~	Houtz, E.F., and D.L. Sedlak. 2012. "Oxidative
Conversion as a Means of Detecting Precursors to
Perfluoroalkyl Acids in Urban Runoff."
Environmental Science and Technology. Volume
46 (17). Pages 9342 to 9349.
www.ncbi.nlm.nih.gov/pubmed/22900587
~	International Agency for Research on Cancer
(IARC). 2016. IARC Monographs on the
Evaluation of Carcinogenic Risks to Humans.
Volume 110.
monoqraphs.iarc.fr/ENG/Monoqraphs/vol110/inde
x.php
~	Kupryianchyk, D., Hale, S.E., Breedveld, G.D.,
and G. Cornelissen. 2016. "Treatment of Sites
Contaminated with Perfluorinated Compounds
Using Biochar Amendment." Chemosphere.
Volume 142. Pages 35 to 40.
www.ncbi.nlm.nih.gov/pubmed/25956025
~	Liu, J., and S. Mejia Avendano. 2013. "Microbial
Degradation of Polyfluoroalkyl Chemicals in the
Environment: A Review." Environment
International. Volume 61. Pages 98 to 114.
www.ncbi.nlm.nih.oov/pubmed/24126208
~	Maine Department of Environmental Protection
(MDEP). 2016. "Maine Remedial Action
Guidelines (RAGs) for Sites Contaminated with
Hazardous Substances."
www.maine.qov/dep/spills/publications/quidance/r
aqs/ME-RAGS-Revised-Final 020516.pdf
~	Michigan Department of Environmental Quality
6
(MDEQ). 2015. "Rule 57 Water Quality Values."
www.michigan.gov/documents/deg/wrd-swas-
rule57 372470 7.pdf
~	Michigan Department of Health and Human
Services (MDHHS). 2016. "Eat Safe Fish Guides."
www, michigan. gov/mdhhs/0,5885,7-339-
71548 54783 54784 54785 58671-296074-
.00.html
~	Minnesota Department of Health (MDH). 2008.
"MDH Evaluation of Point-of-Use Water Treatment
Devices for Perfluorochemical Removal. Final
Report Summary."
www. h ea It h. state. m n. us/d i vs/e h/we I Is/wate rg u a I itv/
poudevicefinalsummarv.pdf
~	MDH. 2017a. "Contaminants and Minnesota Fish."
www, health, state, mn.us/divs/eh/fish/fag. html
~	MDH. 2017b. "MDH Response to EPA Health
Advisory for PFOS and PFOA."
www.health.state.mn.us/divs/eh/hazardous/topics/
pfcs/cu rrent.html
~	MDH. 2017c. "Site-Specific Meal Advice for
Tested Lakes and Rivers."
www, health, state, mn.us/divs/eh/fish/eating/sitespe
cific.html
~	National Science Foundation. 2015. "Nuclear
Physics Technique Helps Companies Detect
Dangerous Compound."
www.nsf.gov/mobile/discoveries/disc summ.isp?c
ntn id=135957&org=NSF
~	New Jersey Department of Environmental
Protection (NJDEP). 2016. "Perfluorooctanoic Acid
(PFOA) in Drinking Water." www.ni.gov/dep/
watersupplv/dwc gualitv pfoa.html
~	North Carolina Department of Environmental
Quality (NCDEQ). 2013. "Interim Maximum
Allowable Concentrations (IMACs)."
deg. nc.gov/docu ment/nc-stds-g roundwater-imac-
2013
~	North Carolina Secretary's Science Advisory
Board on Toxic Air Pollutants (NCSAB). 2012.
"Recommendation to the Division of Water Quality
for an Interim Maximum Allowable Concentration
for Perfluorooctanoic Acid (PFOA) in
Groundwater." deg.nc.gov/about/divisions/air-
gualitv/science-advisorv-board-toxic-air-
pollutants/ncsab-aal-recommendations
~	Oliaei, F., Kriens, D., Weber, R., and A. Watson.
2013. "PFOS and PFC Releases and Associated
Pollution from a PFC Production Plant in
Minnesota (USA)." Environmental Science and
Pollution Research. Volume 20 (4). Pages 1977 to
1992. link.springer.com/article/10.1007/s11356-
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Technical Fact Sheet - PFOS and PFOA
Where can I find more information about PFOS and PFOA? (continued)
~	Organisation for Economic Co-operation and
Development (OECD). Environment Directorate.
2002.	"Hazard Assessment of Perfluorooctane
Sulfonate (PFOS) and its Salts."
www.oecd.org/chemicalsafetv/risk-assessment/
2382880.pdf
~	Place, B.J., and J.A. Field. 2012. "Identification of
Novel Fluorochemicals in Aqueous Film-Forming
Foams (AFFF) Used by the US Military."
Environmental Science and Technology. Volume
46 (13). Pages 7120 to 7127.
www.ncbi.nlm.nih.gov/pmc/articles/PMC3390017
~	Post, G.B., Cohn, P.D., and K.R. Cooper. 2012.
"Perfluorooctanoic Acid (PFOA), an Emerging
Drinking Water Contaminant: A Critical Review of
Recent Literature." Environmental Research.
Volume 116. Pages 93 to 117.
~	Stockholm Convention. 2016. "What Are POPs?"
chm.pops.int/TheConvention/ThePOPs/tabid/673/
Default.aspx
~	Texas Commission on Environmental Quality.
2016. "Texas Risk Reduction Program (TRRP)
Protective Concentration Levels (PCLs)."
www.tceq.texas.gov/remediation/trrp/trrppcls. html
~	United Nations Environment Programme (UNEP).
2006. "Risk Profile on Perfluorooctane Sulfonate."
Stockholm Convention on Persistent Organic
Pollutants Review Committee. Geneva, 6-10
November 2006.
~	U.S. Department of Defense Strategic
Environmental Research and Development
Program (DoD SERDP). 2013. "Remediation of
Perfluoroalkyl Contaminated Aquifers using an In
Situ Two-Layer Barrier: Laboratory Batch and
Column Study." ER-2127. www.serdp-
estcp.org/Program-Areas/Environmental-
Restoration/Contaminated-
Groundwater/Emerging-lssues/ER-2127
~	DoD SERDP. 2014. "Ecotoxicity of Perfluorinated
Compounds." Environmental Restoration (ER)
Program Area. FY2016 Statement of Need.
www.serdp-estcp.org/Funding-
Opportunities/SERDP-Solicitations/Past-SONs
~	DoD SERDP. 2016. "Emerging Issues."
www.serdp-estcp.org/Program-
Areas/Environmental-Restoration/Contaminated-
Groundwater/Emerging-lssues/
~	U.S. Environmental Protection Agency (EPA).
2003.	"Guidance for Obtaining Representative
Laboratory Analytical Subsamples from Particulate
Laboratory Samples." EPA 600/R-03/027. clu-
in.org/download/char/epa subsampling guidance,
pdf
~	EPA. 2006. "SAB Review of EPA's Draft Risk
Assessment of Potential Human Health Effects
Associated with PFOA and Its Salts." EPA SAB-
06-006.
vosemite.epa.gov/sab/sabproduct.nsf/A3C83648E
77252828525717F004B9099/$File/sab 06 006.p
df
~	EPA. 2009a. Method 537. "Determination of
Selected Perfluorinated Alkyl Acids in Drinking
Water by Solid Phase Extraction and Liquid
Chromatography/Tandem Mass Spectrometry
(LC/MS/MS)." Version 1.1. EPA 600/R-08/092.
www. e pa. g o v/wate r- resea rch/e pa-d ri n ki n g-wate r-
research-methods
~	EPA. 2009b. "Long-Chain Perfluorinated
Chemicals (PFCs) Action Plan."
www.epa.gov/assessing-and-managing-
chemicals-under-tsca/long-chain-perfluorinated-
chemicals-pfcs-action-plan
~	EPA. 2013. "The Roles of Project Managers and
Laboratories in Maintaining the
Representativeness of Incremental and Composite
Soil Samples." OSWER 9200.1-117FS.
www.cluin.org/download/
char/RolesofPMsandLabsinSubsampling.pdf
~	EPA. 2015. "Long-Chain Perfluoroalkyl
Carboxylate and Perfluoroalkyl Sulfonate
Chemical Substances; Significant New Use Rule."
Proposed Rule. 40 CFR 721. Federal Register:
Volume 80 (No. 13). www.gpo.gov/fdsvs/pkg/FR-
2015-01 -21/pdf/2015-00636.pdf
~	EPA. 2016a. "Contaminant Candidate List 4-CCL
4."	www.epa.gov/ccl/draft-contaminant-candidate-
list-4-ccl-4
~	EPA. 2016b. "Drinking Water Health Advisory for
Perfluorooctane Sulfonate (PFOS)." EPA 822-R-
16-004. www.epa.gov/ground-water-and-drinking-
water/supporting-documents-drinking-water-
health-advisories-pfoa-and-pfos
~	EPA. 2016c. "Drinking Water Health Advisory for
Perfluorooctanoic Acid (PFOA)." EPA 822-R-16-
005.	www.epa.gov/ground-water-and-drinking-
water/supporting-documents-drinking-water-
health-advisories-pfoa-and-pfos
~	EPA. 2016d. "Health Effects Support Document
for Perfluorooctane Sulfonate (PFOS)." EPA 822-
R-16-002. www.epa.gov/ground-water-and-
drinking-water/supporting-documents-drinking-
water-health-advisories-pfoa-and-pfos
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Technical Fact Sheet - PFOS and PFOA
Where can I find more information about PFOS and PFOA? (continued)
~	EPA. 2016e. "Health Effects Support Document
for Perfluorooctanoic Acid (PFOA)." EPA 822-R-
16-003. www.epa.gov/qround-water-and-drinkinq-
water/supportinq-documents-drinkinq-water-
health-advisories-pfoa-and-pfos
~	EPA. 2016f. "Risk Management for Per- and
Polyfluoroalkyl Substances (PFASs) under TSCA."
www.epa.gov/assessinq-and-manaqinq-
chemicals-under-tsca/perfluorooctanoic-acid-pfoa-
perfluorooctvl-sulfonate
~	EPA. 2017. "Per- and Polyfluoroalkyl Substances
(PFAS): Sampling Studies and Methods
Development for Water and Other Environmental
Media." EPA 600/F-17/022.
~	Vecitis, C.D., Park, H., Cheng, J., and B.T. Mader.
2009. "Treatment Technologies for Aqueous
Perfluorooctanesulfonate (PFOS) and
Perfluorooctanoate (PFOA)." Frontiers of
Environmental Science & Engineering in China.
Volume 3(2). Pages 129 to 151.
~	Vermont Department of Environmental
Conservation (VTDEC). 2016. "Interim
Groundwater Quality Standards."
dec.vermont.qov/sites/dec/files/documents/interim
qwqstandards 2016.pdf
~	Vierke, L., Staude, C., Biegel-Engler, A., Drost,
W., and C. Schulte. 2012. "Perfluorooctanoic acid
(PFOA) — main concerns and regulatory
developments in Europe from an environmental
point of view." Environmental Sciences Europe.
Volume 24 (16).
enveurope.sprinqeropen.com/articles/10.1186/219
0-4715-24-16
Contact Information
If you have any questions or comments on this fact sheet, please contact: Mary Cooke, FFRRO, at
cooke. marvt@epa. gov.
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