^ ^	Chemours (formerly DuPont)



5 yy I	Pompton Lakes Works Site

\	Cleanup Newsletter

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June 2021

Page 1 of 4

The U.S. Environmental Protection Agency (EPA)
and New Jersey Department of Environmental
Protection (DEP) are pleased to present their
second jointly issued newsletter to update the
community on the status of ongoing work at the
Chemours (formerly DuPont) Pompton Lakes
Works site. The work at the site is being overseen
by both EPA and DEP pursuant to the requirements
of a permit issued by EPA and an Administrative
Consent Order issued by DEP.

The first joint EPA/DEP newsletter was issued in
April 2019 and provided an overview of the history
of the Pompton Lakes Works site since remedial
work began in the late 1980s. The April 2019
edition of the newsletter is available on DEP's
website at https://www.nj.gov/dep/srp/
community/sites/dupont pompton lakes/ and
EPA's website at

https://www.epa.gov/ni/chemours-pompton-
lakes-works-site-additional-documents. We
encourage you to refer to it for a brief history of
the former DuPont facility and the remediation, as
well as site maps, information about vapor
intrusion and other important topics.

Since the last joint newsletter was issued, the
COVID-19 pandemic has transformed the daily lives
of New Jersey's residents. We hope your family
has remained healthy throughout the COVID-19
viral outbreak. We are happy to report that work
to remediate the site has largely been unaffected
by the pandemic. Operation and maintenance of
the groundwater extraction and treatment system,
which is designed to prevent contaminated
groundwater from migrating off the former
Pompton Lakes Works facility, has continued
unabated. Groundwater monitoring was

We Want to Hear from You

EPA representatives are available to answer
your questions regarding the environmental
remediation at the site.

Please contact Pat Seppi, EPA's Community
Involvement Coordinator, at 646-369-0068 /

Seppi.Pat@epa.gov

Perry Katz, EPA's Project Manager
at 212-637-4426/H



a-gov

performed, and an associated report was
submitted and approved. Meanwhile, EPA and DEP
case team members are reviewing site documents
as they work remotely.

EPA and DEP did need to change some site
practices to protect public health in response to
the COVID-19 pandemic. For example, annual
inspections of residential vapor mitigation systems
were suspended between March and July of 2020,
as these inspections require access to homes.
Following modified protocols, these inspections
have begun again using new protective protocols
and we will schedule visits for all homes that are
due to be inspected. EPA had suspended its Open
Hours, which were held on Thursdays at the
Pompton Lakes Municipal Building to allow
residents the opportunity to speak directly to EPA
and DEP representatives. We are pleased to
announce that regular weekly office hours have

Additional Resources:

EPA Pompton Lakes website: www.epa.gov/nj/chemours-pompton-lakes-works-site-pompton-lakes-nj
NJ Department of Environmental Protection: www.nj.gov/dep/srp/community/sites/dupont_pompton_lakes

U.S. Environmental Protection Agency Region 2 0 290 Broadway 0 New York, NY 10007 0 877-251-4575 0 www.epa.gov/region2
NJ Department of Environmental Protection 0 401 East State Street 0 Trenton, NJ 08625-0609 0 609-292-1250 0 www.nj.gov/dep/srp


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^ ^	Chemours (formerly DuPont)



5 yy I	Pompton Lakes Works Site

\	Cleanup Newsletter

PrO^*-

June 2021

resumed as of Thursday, June 3. Pompton Lakes
residents are always free to contact DEP and EPA
representatives by phone or email with their
questions and comments.

This issue of the newsletter will primarily focus on
the major site developments that have occurred
since April 2019. Topics include an update on the
evaluation of potential corrective measures for the
contaminated on-site soil at the former Pompton
Lakes Works facility, information about vapor
mitigation efforts for certain homes overlying the
off-site plume, and updates on the Long-Term
Monitoring Plan for the recently dredged Pompton
Lake and the posting of fishing advisory signs near
the lake.

On-site Soil Corrective Measures Study (CMS)

Chemours has submitted a draft CMS that
evaluates remediation options for on-site soil
located at the former Pompton Lakes Works
Facility that are impacted with metals such as
mercury and lead and a class of organic compounds
known as polycyclic aromatic hydrocarbons (PAHs).
EPA and DEP conducted a review of Chemours'
draft CMS and required that it be revised to
address issues related to the soil remediation
standards and contain more detail on the
remediation options so that the most appropriate
remediation alternative for on-site soil can be
determined. Chemours submitted a draft revised
CMS that is being reviewed by EPA and DEP. After
EPA and DEP complete their evaluation of the CMS,
EPA will propose a corrective measure(s) for on-
site soil in the form of revisions to the existing
Chemours permit.

Page 2 of 4

EPA will make information on the permit
modification available for review during a public
comment period, which will include a formal public
hearing. The public will be able to comment either
verbally during the public hearing or in writing or
both. EPA's and DEP's responses to public
comments will be included in a document known
as a Responsiveness Summary that will be part of
the final permit modification. This information will
be posted on EPA's website at
https://www.epa.gov/ni/chemours-pompton-
lakes-works-site-additional-documents.

Vapor Mitigation Systems (VMS) Update

Approximately 340 vapor mitigation systems (VMS)
have been installed in the residential area that EPA
and DEP have defined as the "vapor intrusion
investigation area" (also known locally as the "off-
site plume area"). Due to the COVID-19 outbreak,
annual inspections of vapor mitigation systems
performed by both Chemours and third-party
contractors were suspended due to health and
safety concerns for both residents and workers
inspecting the systems. However, situations where
a vapor mitigation system was not operational or
otherwise needed repair were addressed following
CDC guidelines for the protection of residents and
workers performing the inspection/repairs.

It is important to note that property owners in the
off-site plume area who formerly used either
Leggette, Brashears & Graham, Inc. (LBG) or Clean
Vapor Inc. as their VMS maintenance contractor
under the Third Party Contractor Program and have
yet to select a replacement contractor are
responsible for monitoring and maintaining the
systems on their own and at their own expense,
until they select a new third party contractor. In

Additional Resources:

EPA Pompton Lakes website: www.epa.gov/nj/chemours-pompton-lakes-works-site-pompton-lakes-nj
NJ Department of Environmental Protection: www.nj.gov/dep/srp/community/sites/dupont_pompton_lakes

U.S. Environmental Protection Agency Region 2 0 290 Broadway 0 New York, NY 10007 0 877-251-4575 0 www.epa.gov/region2
NJ Department of Environmental Protection 0 401 East State Street 0 Trenton, NJ 08625-0609 0 609-292-1250 0 www.nj.gov/dep/srp


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^ ^	Chemours (formerly DuPont)



|	I	Pompton Lakes Works Site

Cleanup Newsletter

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June 2021

addition, property owners who have not selected a
replacement contractor are ineligible to receive
reimbursement for electrical costs to operate their
VMS until they have selected a replacement
contractor and the system has been inspected.

Those who haven't yet selected a new contractor
have the following three options:

1)	Sign up with either Viridian or Advanced
GeoServices, two third party VMS contractors
that have been approved by EPA; or

2)	Sign up with HDR (Chemours' environmental
contractor); or

3)	Select another certified contractor that is
capable of monitoring and maintaining radon-
type mitigation systems, subject to EPA
approval.

An additional firm, OBAR Systems, is also available
to design/install new systems as well as
maintain/repair existing systems but is not
available to perform the annual inspection/
reporting required by EPA and DEP for existing
systems. For more information, please refer to the
letters previously sent to you from EPA, or contact
Perry Katz, EPA's Project Manager at 212-637-4426
or via email at katz. ira-perry(5)epa .gov.

Under DuPont's Vapor Intrusion Work Plan,
property owners within the off-site plume area are
eligible to receive a VMS regardless of whether
sampling has indicated a system is needed.
Residences located within the green lines of the
Vapor Intrusion map on DEP's website at
https://www.ni.gov/dep/srp/community/sites/dup
ont pompton lakes/documents maps.htm

Page 3 of 4

are eligible to receive a VMS free of charge. If you
own a property within the off-site plume area and
you are interested in having a system installed, or
you would like to explore having your existing
system decommissioned, please contact either Pat
Seppi of EPA or Heather Swartz of DEP.

Long-Term Monitoring Plan for Pompton Lake

EPA's permit with Chemours for the site includes a
requirement that Chemours develop a Long-Term
Monitoring Plan (LTMP) for the portion of Pompton
Lake that was dredged between 2016 and 2018 to

	\/OP Pnnt->minntnH f^rnnnH \AHtnr	

A vapor mitigation system (VMS) consists of piping
installed through the slab floor and a fan connected to
the piping. When the system is on, the fan applies a
vacuum beneath the slab and the vapors in the soil
beneath the building are directed outside.

The above figure shows a VMS installed at a typical residence
with a full basement arid is not necessarily representative of
the system at your property.

Additional Resources:

EPA Pompton Lakes website: www.epa.gov/nj/chemours-pompton-lakes-works-site-pompton-lakes-nj
NJ Department of Environmental Protection: www.nj.gov/dep/srp/community/sites/dupont_pompton_lakes

U.S. Environmental Protection Agency Region 2 0 290 Broadway 0 New York, NY 10007 0 877-251-4575 0 www.epa.gov/region2
NJ Department of Environmental Protection 0 401 East State Street 0 Trenton, NJ 08625-0609 0 609-292-1250 0 www.nj.gov/dep/srp


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^ ^	Chemours (formerly DuPont)



>	I	Pompton Lakes Works Site

\	Cleanup Newsletter	C>$S^'

PRO"^

June 2021

remove mercury-contaminated sediments. When
finalized, the LTMP will establish clear criteria for
the sampling of surface water, sediment, sediment
pore water, fish, and insect tissue to assess the
levels of mercury in these sampling media over an
initial five-year period. The information gathered
will be compared to previously collected data from
Pompton Lake to assess the overall condition of the
Pompton Lake ecosystem as a result of the
dredging. In addition, the findings of the initial
five-year sampling and monitoring period will be
used to determine the scope of any further
remedial action (if required) and/or any changes to
the monitoring.

EPA and DEP have reviewed Chemours' draft LTMP
and are having dialogue about technical comments
that must be addressed. After it is approved,
Chemours will be responsible for implementing the
LTMP. There are reporting requirements in the
LTMP that will allow EPA and DEP to track
Chemours' progress. The draft LTMP and EPA's
and DEP's comments are posted on EPA's website
at https://www.epa.gov/ni/chemours-pompton-
lakes-works-site-additional-documents.

Fish Advisory Sign Update

In response to requests from Pompton Lakes
residents, EPA and DEP have worked with local
officials to install additional fish advisory signs, in
both English and Spanish, at various locations at
the lakefront along Lakeside Avenue, including at
Lakeside Park and the boat launch. Signs were also
installed in October 2019 in the newly restored
Rotary Park by the Pompton Lakes Board of
Education, which owns the park, and near Acid
Brook. In addition, EPA worked with the Passaic
County Engineer's Office to have fish advisory signs

Page 4 of 4

installed on the Lakeside Avenue bridge. The
Engineer's Office, which manages and maintains
the bridge, selected the four locations where the
signs were installed in September 2020.

¦

WaRTJING!

HIGH-RISK- INmwm	

Nothing in this correspondence affects Chemours
Company FC, LLC's potential liability and
obligations to the New Jersey State Trustee, the
New Jersey Department of Environmental
Protection or its Commissioner regarding natural
resource injuries, restoration, or damages.

Fish advisory signs in English and Spanish were recently
installed at several locations near Pompton Lake and Acid
Brook, as well as on the Lakeside Avenue Bridge.

Additional Resources:

EPA Pompton Lakes website: www.epa.gov/nj/chemours-pompton-lakes-works-site-pompton-lakes-nj
NJ Department of Environmental Protection: www.nj.gov/dep/srp/communi ty/sites/dupont_pompton_lakes

U.S. Environmental Protection Agency Region 2 0 290 Broadway 0 New York, NY 10007 0 877-251-4575 0 www.epa.gov/region2
NJ Department of Environmental Protection 0 401 East State Street 0 Trenton, NJ 08625-0609 0 609-292-1250 0 www.nj.gov/dep/srp


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