&EPA
United States
Environmental Protection
Agency
Solid Waste And
Emergency Response
(5201 G)
SUPERFUND:
EPA/540/R-95/090
PB95-962922
9200.5-720C
May 1995
Progress at
National
Priority
List Sites
MAINE
1995 UPDATE
Printed on Recycled Paper
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How to Use the NPL Book
-yo
i-.
The site fact sheets presented in this book
are comprehensive summaries that cover a
broad range of information. The fact sheets
describe hazardous waste sites on the NPL and
their locations, as well as the conditions
leading to their listing ("Site Description").
The summaries list the types of contaminants
that have been discovered and related threats
to public and ecological health ("Threats and
Contaminants"). "Cleanup Approach" pres-
ents an overview of the cleanup activities
completed, underway, or planned. The fact
sheets conclude with a brief synopsis of how
much progress has been made in protecting
public health and the environment. The
summaries also pinpoint other actions, such as
legal efforts to involve polluters responsible
for site contamination and community con-
cerns.
The fact sheets are arranged in alphabetical
order by site name. Because site cleanup is a
dynamic and gradual process, all site informa-
tion is accurate as of the date shown on the
bottom of each page. Progress is always being
made at NPL sites, and the EPA periodically
will update the site fact sheets to reflect recent
actions. The following two pages show a
generic fact sheet and briefly describe the
information under each section.
How Can You Use
This State Book?
You can use this book to keep informed
about the sites that concern you, particu-
larly ones close to home. The EPA is commit-
ted to involving the public in the decision
making process associated with hazardous
waste cleanup. The Agency solicits input from
area residents in communities affected by
Superfund sites. Citizens are likely to be
affected not only by hazardous site conditions,
but also by the remedies that combat them.
Site cleanups take many forms and can affect
communities in different ways. Local traffic
may be rerouted, residents may be relocated,
temporary water supplies may be necessary.
Definitive information on a site can help
citizens sift through alternatives and make
decisions. To make good choices, you must
know what the threats are and how the EPA
intends to clean up the site. You must under-
stand the cleanup alternatives being proposed
for site cleanup and how residents may be
affected by each one. You also need to have
some idea of how your community intends to
use the site in the future, and you need to know
what the community can realistically expect
once the cleanup is complete.
The EPA wants to develop cleanup methods
that meet community needs, but the Agency
only can take local concerns into account if it
understands what they are. Information must
travel both ways in order for cleanups to be
effective and satisfactory. Please take this
opportunity to learn more, become involved,
and assure that hazardous waste cleanup at
"your" site considers your community's
concerns.
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NPL LISTING HISTORY
Provides the dates when the
site was Proposed, made Final,
and Deleted from the NPL.
SITE RESPONSIBILITY
Identifies the Federal, State,
and/or potentially responsible
parties taking responsibility
for cleanup actions at the site.
ENVIRONMENTAL
PROGRESS
Summarizes the actions to
reduce the threats to nearby
residents and the surrounding
environment and the progress
towards cleaning up the site.
SITE NAME
STATE
EPAID# ABCOOOOOOO
Site Description
EPA REGION XX
COUNTY NAME
LOCATION
Other Names:
1
L XXX XXXXX XXXXXXXXXXXX XXXXXX XXXXXXXXX XXXXXXXX XXXXXXXXXXXXX :
; xxxxxxxxxx xxxx xxxxxxxx xxxx xx xxxxxxxxx xx xxxxxx xxxxxxxx 1
: xxx xxxxxxxxxxxxx xx xxxxxx xxxx xxxxx xxxx x xxx :
xxxxxxx xxx ii ii iiTTi»i jqniii n 11 xxxxx xxxxxx xxxxxxxx xxxxxxxx xxxx xxxxxxxxxx :
XXXXXXXXXXXX XXXXXXXXX^&WtXX^ XXX XX XXXXXXXXX XXXXX XXXX XXXX XXXXX XXXXXXX XXXXXXXX
xxxxxxxx xxxxxxxxx xxxx xxxxjOumxxxxx xxxxxxxx xxxxx xxxx xxxxx xxx xxx xxxxxx
XXXXXXXXXXXX XX XXXXXXX XXX XXXXX XJ&B»fc1JOCX XXXXXX XX XXXX XXX XXXXX XXX XXXXX XXX XXXXX
Site Responsibility: *xxxxx
xxxxxx xxxxxxxxx xxxxxxxx
xxxxxxxxxxxxx xxxxxxxxx
NPL Listing History
Proposed: XX/XX/XX
Final. XX/XX/XX
Threats and Contaminants
XXXXXX XXX XXXXX XXXXXXXXXXXX XXXXXX XXXXXXXXX XXXXXXXX
XXXXXXXXX XXXXXXXXXXXXX XXXXXXXXXX XXXX XXXXXXXX XXXX XX XXXXXXXXX
XXXXXXXX XXX XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX
XXX XXXXXXXXXX XXXXXXXX XXXXXXX XXX XXXXXX XXXXXX XXXXX XXXXXX
XXXXXXXX XXXX XXXXXXXXXX XXXXXXXX XXXXXXXXXXXX XXXXXXXXX XXXX X XXX XX XXXXXXXXX'
XXXX XXXX XXXXX XXXXXXX XXXXXXXX XXXXXXXX XXXXXXXXX XXXX XXXX XXXXX XXXX
Cleanup Approach
XXXXXX XXX XXXXX XXXXXXXXXXXX XXXXXX XXXXXXXXX XXXXXXXX XXXXXXXXXXXXX
XXXXXXXXXXXXX XXXXXXXXXX XXXX XXXXXXXX XXXX XX XXXXXXXXX XX XXXXXX XXXXXXXX
XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX XXXXX XXXX X XXX XXXXXXXX
Response Action Status
XXXXXX XXX XXXXX XXXXXXXXXXXX XXXXXX XXXXXXXXX XXXXXXXX :
XXXXXXXXXXXXX XXXXXXXXXX XXXX XXXXXXXX XXXX XX XXXXXXXXX XX XXXXXX \
XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX XXXXX XXXX X :
XXXXXXXX XXXXXXX XXX XXXXXX XXXXXX XXXXX XXXXXX XXXXXXXX :
XXXXXXXXXX XXXXXXXX XXXXXXXXXXXX XXXXXXXXX XXXX X XXX XX XXXXXXXXX XXXXX XXXX XXXX XXXXX
XXXXXXX XXXXXXXX XXXXXXXX XXXXXXXXX XXXX XXXX XXXXX XXXX XXXXXXXX XXXXX XXXX XXXXX XXX
XXX XXXXXX XXXXXXXXXXXX XX XXXXXXX XXX XXXXXX XX XXXXXX XXXXXXXX XXX :
Site Facts:
XXXXXX XXX XXXXX XXXXXXXXXXXX XXXXXX XXXXXXXXX XXXXXXXX
XXXXXXXXX XXXXXXXXXXXXX XXXXXXXXXX XXXX XXXXXXXX XXXX XX XXXXXXXXX XX XXXXXX
XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX XXXXX XXXX X XXX
^iroUCXXX XXX XXXXXX
Environmental Progress
XXXXXX XXX XXXXX XXXXXXXXXXXX XXXXXX XXXXXXXXX XXXXXXXX XXXXXXXXXXXXX XXXXXXXXX
XXXXXXXXXXXXX XXXXXXXXXX XXXX XXXXXXXX XXXX XX XXXXXXXXX XX XXXXXX XXXXXXXX XXX
XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX XXXXX XXXX X XXX XXXXXXXXXX
XXXXXXXX XXXXXXX XXX XXXXXX XXXXXX XXX XXXXX XXXXXXXXXXXX XXXXXX XXXXXXXXX XXXXXXXX
Site Repository
XXXXXX XXX XXXXX XXXXXXXXXXXX XXXXXX XXXXXXXXX XXXXXXXX XXXXXXXXXXXXX XXXXXXXXX
\
SITE REPOSITORY
Lists the location of the primary site repository. The site
repository may include community relations plans, public
meeting announcements and minutes, fact sheets, press
releases, and other site-related documents.
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SITE DESCRIPTION
This section describes the location and history of the site. It includes descrip-
tions of the most recent activities and past actions at the site that have con-
tributed to the contamination. Population estimates, land usages, and nearby
resources give readers background on the local setting surrounding the site.
THREATS AND CONTAMINANTS
The major chemical categories of site contamination are noted, as well as
which environmental resources are affected. Icons representing each of the
affected resources (may include air, groundwater, surface water, soil, and
contamination to environmentally sensitive areas) are included in the margins
of this section. Potential threats to residents and the surrounding environ-
ments arising from the site contamination also are described.
CLEANUP APPROACH
This section contains a brief overview of how the site is being cleaned up.
RESPONSE ACTION STATUS
Specific actions that have been accomplished or will be undertaken to clean
up the site are described here. Cleanup activities at NPL sites are divided
into separate phases, depending on the complexity and required actions at the
site. Two major types of cleanup activities often are described: initial,
immediate, or emergency actions to quickly remove or reduce imminent
threats to the community and surrounding areas; and long-term remedial
phases directed at final cleanup at the site. Each stage of the cleanup strategy
is presented in this section of the summary. Icons representing the stage of
the cleanup process (initial actions, site investigations, EPA selection of the
cleanup remedy, engineering design phase, cleanup activities underway, and
completed cleanup) are located in the margin next to each activity descrip-
tion.
SITE FACTS
Additional information on activities and events at the site are included in this
section. Often details on legal or administrative actions taken by the EPA to
achieve site cleanup or other facts pertaining to community involvement with
the site cleanup process are reported here.
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Guide to the NPL Book Icons
The "icons," or symbols, accompanying the text allow the reader to see at a glance which envi-
ronmental resources are affected and the status of cleanup activities at the site.
Icons in the Threats
and Contaminants
Section
Icons in the Response
Action Status Section
Contaminated Ground-water re-
sources in the vicinity or underlying
the site. (Groundwater is often used
as a drinking water source.)
Contaminated Surface Water and
Sediments on or near the site.
(These include lakes, ponds,
streams, and rivers.)
Contaminated Air in the vicinity of
the site. (Air pollution usually is
periodic and involves contaminated
dust particles or hazardous gas
emissions.)
Contaminated Soil and Sludges on
or near the site. (This contamination
category may include bulk or other
surface hazardous wastes found on
the site.)
Threatened or contaminated Envi-
ronmentally Sensitive Areas in the
vicinity of the site. (Examples
include wetlands and coastal areas
or critical habitats.)
Initial, Immediate, or Emergency
Actions have been taken or are
underway to eliminate immediate
threats at the site.
Site Studies at the site to determine
the nature and extent of contamina-
tion are planned or underway.
Remedy Selected indicates that site
investigations have been concluded,
and the EPA has selected a final
cleanup remedy for the site or part
of the site.
Remedy Design means that engi-
neers are preparing specifications
and drawings for the selected
cleanup technologies.
Cleanup Ongoing indicates that the
selected cleanup remedies for the
contaminated site, or part of the site,
currently are underway.
Cleanup Complete shows that all
cleanup goals have been achieved
for the contaminated site or part of
the site.
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EPA ID
Number
ME8170022018
ME9570024522
MED980524078
MED980731475
MED980732291
ME7170022019
MED980504393
MED980520241
MED042143883
MED980504435
Site Name
BRUNSWICK NAVAL AIR STATION
LORING AIR FORCE BASE
MCKIN CO.
O'CONNOR CO.
PINETTE'S SALVAGE YARD
PORTSMOUTH NAVAL SHIPYARD
SACO MUNICIPAL LANDFILL
SACO TANNERY WASTE PITS
UNION CHEMICAL CO., INC.
WINTHROP LANDFILL
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BRUNSWICK I
AIR STATION
MAINE
EPA ID# ME8170022018
Site Description
EPA REGION 1
Cumberland County
At Routes 24 & 123 in Brunswick
Other Names:
U.S. Navy NAS
The Brunswick Naval Air Station is a U.S. Navy installation that occupies 3,094 acres in the
Town of Brunswick. It is located south of the Androscoggin River between Brunswick and Bath,
Maine, south of Route 1 and between Routes 24 and 123. The various landfills at the site were
used from 1945 to 1979. To date, 13 areas have been identified for investigation and cleanup.
Among the identified site areas, three were used primarily for landfilling the station's household,
office, and other wastes. Other areas were reported to have been used for the disposal of various
acids, caustics, solvents, and building materials including asbestos. Three additional areas,
including a fire training area, an ammunition dump, and the Defense Reutilization and Marketing
Office (DRMO) facility have been added to the investigation. Two areas were also found to
contain asbestos. Pesticides, solvents, and waste oils present on the sites could threaten surface
water and nearby wetlands. Approximately 3,000 people live on the base within 1/2 mile of the
contaminated areas of the site, and nearly 18,000 people who rely on the groundwater for
drinking water are potentially threatened. The nearest residence is located within 1,000 feet of the
sites. An elementary school, a college, and a hospital are located within 1 mile of the western
base boundary. Area surface water is used for recreation, irrigation, and commercial fishing.
Site Responsibility:
The site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 10/01/84
Final Date: 07/02/87
Threats and Contaminants
The groundwater is contaminated with volatile organic compounds (VOCs). Soils are
contaminated with VOCs, semi-volatile organics, pesticides, and heavy metals.
Accidental ingestion of or direct contact with groundwater or soil may pose health
risks to people. The area is restricted to the general public, but base personnel may
come into contact with contamination. Harpswell Cove, an estuary downstream of the
site, also is subject to potential contamination. Area surface water is used for
recreation.
July 1995
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Cleanup Approach
This site is being addressed in two phases: initial actions and six long-term remedial phases
focusing on cleanup of specific areas of contamination. Cleanup actions have begun at some areas
while the Navy is completing investigations at others that will lead to further cleanup activities.
Response Action Status
Initial Actions: The Navy removed over 1,000 cubic yards of pesticide-
contaminated soil in 1994 and transported it off site for incineration.
Sites 1 and 3, Orion Street Landfill North, and Hazardous Waste Burial
Area: With assistance from the EPA and Maine's Department of Environmental
Protection (ME DEP), the nature and extent of contamination was examined at these
areas. In 1992, the EPA selected a remedy that includes: building a cap to contain landfill
wastes; building a slurry wall to contain contaminated groundwater; and installing a system to
extract and treat the groundwater which, in turn, is released to a municipal water treatment plant
for further treatment. Construction of the remedies began in late 1994.
Eastern Plume: An interim remedy was selected in mid-1992. The remedy entails
hydraulic containment of the groundwater, which will prevent further migration of the
plume, and discharge of contaminants into the Harpswell Cove estuary. Construction
began in the summer of 1994 and cleanup actions are expected to be completed hi 1996.
Perimeter Road Landfill: A cleanup remedy was selected for this area in 1993. The
community played a large role in the remedy selection for this area; they voiced
opposition to the original remedy selected, which was to contain the contamination.
The Navy reconsidered and selected a remedy to excavate up to 14,000 cubic yards of soil,
construction rubble, and debris. The excavated material will be transported to Sites 1 and 3
where it will be used to help build the landfill cap. No land use restrictions are necessary at this
area since all materials will be removed. Cleanup activities are currently underway and are
expected to be completed by 1996.
Sites 5 & 6: Investigations at these areas were completed in 1993. As a result, a
cleanup remedy was selected, which calls for the excavation of asbestos-containing
materials and pipes from both sites. All excavated materials will be solidified in two
layers of polyethylene, transported to Sites 1 and 3, and used as part of the necessary subgrade
layer for the landfill cap. No land use restrictions are necessary for Sites 5 and 6 since all
materials will be removed. Cleanup activities, currently underway, are expected to be completed
late in 1995.
Neptune Drive Disposal Area (Site 9): Investigations into the nature and extent
of groundwater contamination at this area were completed in 1994. Based on the
results of these investigations, the Navy determined that groundwater contamination
will naturally dissipate over time and poses no immediate threats. The Navy will continue
monitoring the groundwater to determine if additional cleanup actions are necessary.
July 1995 2 BRUNSWICK NAVAL AIR STATION
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Sites 2, 4, 7, 11, 12, and 13: Investigations are underway to determine the
extent of contamination at these additional sites and are expected to be complete in
1996. In late 1994, several drums and contaminated soils were removed from Site 11.
Site Facts: The Navy and the EPA have agreed on their cleanup responsibilities under an
Interagency Agreement (IAG). The IAG later was amended to include the State of Maine as a
party to the cleanup. Brunswick Naval Air Station is participating in the Installation Restoration
Program, a specially funded program established by the Department of Defense (DOD) in 1978
to identify, investigate and control the migration of hazardous contaminants at military and other
DOD facilities. The first EPA Technical Assistance Grant (TAG) was awarded to a local
community group called Brunswick Area Citizens for a Safe Environment in 1990. Throughout
the entire process, there has been excellent public participation, especially from the TAG
recipient, Brunswick Area Citizens for a Safe Environment.
Environmental Progress
After adding this site to the NPL, the Navy removed most of the base's old underground storage
tanks and replaced some with new tanks. In addition, the 1994 removal of soils and drums have
made the site safer while additional cleanup actions and studies are underway.
Site Repository
Curtis Memorial Library, 23 Pleasant Street, Brunswick, ME 04011
BRUNSWICK NAVAL AIR STATION
July 1995
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LORING AIR
FORCE BASE
MAINE
EPA ID# ME9570024522
EPA REGION 1
Aroostook County
Northeastern Maine
Other Names:
Fire Training Area
US Air Force Loring AFB
Flightline Area
Site Description
The 9,000-acre Loring Air Force Base, which operated as an active military installation since
1952, was closed in September 1994. Hazardous wastes generated on the base include waste
oils, fuels cleaned from aircraft and vehicles, spent solvents (many of them chlorinated organic
chemicals), poly chlorinated biphenyls (PCBs), and pesticides. Historically, wastes have been
burned or buried in landfills. There are on-site landfills, some of which are old gravel pits.
Landfills #2 and #3 were used for disposal of hazardous wastes from 1956 to the early 1980s. In
the Fire Training Area, large quantities of hazardous materials were landfilled until 1968 and
burned until 1974. The 600-acre Flightline and Nose Dock Areas, with their industrial shops and
maintenance hangars, were primary generators of hazardous waste on the base. Most wastes were
disposed of off site; however, some wastes probably were disposed of on the ground, on
concrete, or in the storm and sewer drains. The site is located in a rural area. The population on
the Air Force base within 1 mile of the site is 8,500. A 3,500-foot channelized portion of a
tributary to the East Branch of Greenlaw Brook receives storm water runoff from the Flightline
Area and the Nose Dock Area, where fuels were handled. An estimated 1,200 people obtain
drinking water from wells located within 3 miles of hazardous substances on the base; the nearest
well is less than 500 feet from where transformers were buried. Surface water both on and off
base is used for recreational activities.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 02/21/90
July 1995
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Threats and Contaminants
Monitoring well tests indicated that the groundwater on the base is contaminated with
volatile organic compounds (VOCs) such as trichloroethylene (TCE), carbon
tetrachloride and fuel-related compounds, including benzene and toluene. Soils in the
Flightline and Nose Dock Areas contain significant amounts of fuel, oil, polynuclear
aromatic hydrocarbons (PAHs), and various VOCs. Surface water and sediment in the
Flightline Drainage Ditch are contaminated with VOCs and heavy metals. People on
the base are potentially threatened by direct contact with hazardous substances at the
landfills and burn pit because the pit is inadequately fenced. Other potential threats to
the public include accidental ingestion of or direct contact with contaminated soils and
water. Several wetlands are threatened by contamination on the base.
Cleanup Approach
The site is being addressed in six stages: initial actions and five long-term remedial phases
focusing on cleanup of the most critical areas, including the Nose Dock Area, the Fire Training
Area, the landfills, the Flightline Drainage Ditch, East Gate soils area, quarry area, and the
remainder of the site.
Response Action Status
Initial Actions: The Air Force removed contaminated soils from the Flightline
Drainage Ditch area, as well as tanks near the power plant to reduce the spread of
contamination.
Nose Dock Area: The Air Force is investigating the nature and extent of soil
contamination in the Nose Dock Area. A decision on final cleanup activities is
expected in 1996. Currently, a bioventing system for petroleum-contaminated soil is
being constructed and contaminated soil "hot spots" are being excavated.
Fire Training Area: An additional investigation into the contamination of the Fire
Training Area is underway and is expected to be completed in 1996. The investigation
will define the contaminants and will recommend alternatives for the final cleanup of
the area.
Landfills: The Air Force began conducting an investigation into the nature and extent
of contamination associated with Landfills #1, #2, and #3 in 1991. In 1994, the Air
Force selected a cleanup remedy for Landfills #2 and #3. Cleanup involves compiling
contaminated soils from various other areas of the base and constructing a permanent cap to
prevent the migration of contaminants. Construction of the cap began in 1994 and is scheduled to
be completed in 1996. A final decision on cleanup remedies to address landfill #1 is still being
negotiated.
July 1995 2 LORING AIR FORCE BASE
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Flightline Drainage Ditch: An investigation into the contamination in the Flightline
Drainage Ditch area began in 1991. The investigation will identify the various
contaminants and will recommend alternatives for cleaning up this area. A decision on
cleanup is expected in 1997. Currently, "hot spot" removal of soil contaminated with solvents,
petroleum, and PAHs is being performed.
East Gate Soils: In 1991, the EPA began an investigation into the nature and extent
of soil contamination. The final cleanup remedy, selected in 1994, included
excavating contaminated soils and placing them under an on-site landfill cap. Design
of the remedy was completed in 1995 and cleanup of the site is expected to be completed in mid-
1996.
Quarry: In 1991, the EPA began an investigation into the nature and extent of site
contamination. The final cleanup remedy, selected in 1994, included excavating
contaminated soils and placing them under an on-site landfill cap. Design of the
remedy was completed in 1995, while cleanup of the site is expected to be completed in mid-
1996.
Remainder of the Site: An investigation into the contamination at 15 additional
areas within the site began in 1989. At the conclusion of these studies, the Air Force,
in conjunction with the EPA and the State, will recommend the best approaches for
final cleanup. These areas will be divided into separate cleanup phases as the site studies proceed.
Site Facts: An Interagency Agreement (IAG) was signed in 1991 between the EPA, the Air
Force, and the State of Maine. Lor ing Air Force Base is participating in the Installation
Restoration Program, a specially funded program established by the Department of Defense
(DOD) in 1978 to identify, investigate, and control the migration of hazardous contaminants at
military and other DOD facilities. Loring Air Force Base has been selected for closure in 1994
by the DOD, but the Air Force will continue its program to clean up the hazardous wastes found
on the Base.
Environmental Progress
The removal of soil and tanks have limited further contamination and maintained site safety while
the Air Force is continuing investigations at the Loring Air Force Base.
Site Repository
Robert A. Frost Memorial Library, 238 Main Street, Limestone, ME 04750
LORING AIR FORCE BASE 3 July 1995
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MCKIN COMPAN
MAINE
EPA ID# MED980524078
EPA REGION 1
Cumberland County
Mayall Road, 1 mile east of the
Town of Gray
Site Description
The 7-acre McKin Company site is located in a rural residential area about 1 mile east of the
center of the Town of Gray. The site formerly operated as a sand and gravel pit that had been
excavated to depths of 6 to 20 feet below the land surface. The facility was built for waste
generated when a Norwegian tanker ran aground on a ledge in Hussey Sound, spilling 100,000
gallons of industrial fuel. Between 1965 and 1978, the plant handled and disposed of a mixture of
solvents, oils, and other chemicals. Approximately 100,000 to 200,000 gallons of waste are
thought to have been processed annually. Operating facilities included an incinerator, a concrete
block building, an asphalt-lined lagoon, and storage and fuel tanks. Wastes also may have been
disposed of by spreading them over the ground surface. As early as 1973, residents of East Gray
reported odors in well water and discoloration of laundry. In 1977, the EPA confirmed that
contaminated groundwater had reached many of the local private wells. These water supplies
were capped, and the Farmers Home Administration trucked in water supplies. The public water
system was extended to the affected area in 1978, and all residents were connected to it.
Approximately 300 people live within a 1/2-mile radius of the site. The nearest residence is
located 300 feet northeast of the property.
Site Responsibility:
The site is being addressed through
Federal, Stale, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
Threats and Contaminants
Z1AJ
The groundwater is contaminated with volatile organic compounds (VOCs) including
trichloroethane (TCA) and trichloroethylene (TCE). The soil was contaminated with
VOCs, petrochemicals, and heavy metals including arsenic, lead, and mercury.
Off-site surface water and groundwater are also contaminated with VOCs. There is no
known current exposure of residents to the groundwater, since all residents are
connected to the public water supply. Potential threats exist from contaminated
groundwater discharges to Boiling Springs located nearby; however, the ongoing
groundwater treatment at the site is addressing this potential threat.
July 1995
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Cleanup Approach
Response Action Status
Initial Actions: In 1979, the State removed 33,500 gallons of wastes and 165 drums of
oils and chemicals. From 1985 to 1987, the parties potentially responsible for site
contamination removed 55-gallon drums from the site. A fence surrounding the process
area facilities was repaired, and a similar fence was installed across the front of the facility to
prevent unauthorized access. Monitoring wells were also installed. Other actions included cleaning
the tanks, transporting the empty tanks off site for salvage, and transporting liquids and sludges off
site for disposal. The State cleaned and removed all of the remaining aboveground tanks in 1985.
Soil: The remedies selected by the EPA, in 1985, for soil contamination included
aeration of the soil and off-site disposal off site of 16 drums. All of the selected cleanup
remedies were completed by the potentially responsible parties in 1987. Thermal soil
aeration reduced contaminant levels in 12,000 cubic yards of soils to safe levels.
Groundwater: The remedies selected by the EPA for the cleanup of the groundwater
included: installing a groundwater extraction, treatment, and discharge system;
monitoring the groundwater and surface water to evaluate the effectiveness of the source
control actions and off-site groundwater programs; and closing down the site by demolishing
buildings, clearing debris, draining and filling in the lagoon, removing drums and other
contaminated materials, fencing the site, and covering the site with soil and vegetation. The
potentially responsible parties began cleanup in 1990 under EPA oversight. Site closure activities
and construction of the groundwater treatment system have been completed. Currently, groundwater
is being extracted and treated to remove contaminants. Treatment is expected to be completed in
1995.
Site Facts: In 1988, the EPA and the State finalized an agreement with over 320 potentially
responsible parties to carry out the cleanup plan.
Environmental Progress
All construction activities at the McKin Company site have been completed. Groundwater treatment
will continue until established cleanup goals have been met, currently scheduled for 1995. Soil
contamination levels have been reduced to established cleanup standards, and no longer pose a
threat.
Site Repository
Gray Public Library, 5 Skilling Street, Gray, ME 04039
July 1995 2 MCKIN COMPANY
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O'CONNOR
COMPANY
MAINE
EPA ID#MED980731475
EPA REGION 1
Kennebec County
Along U.S. Route 1 7 in Augusta
Site Description
The O'Connor Company site occupies approximately 23 acres within a 65-acre area. The site
includes a large barn that formerly housed scrap operations, an upland marsh, two lagoons, three
former transformer work areas, and a former scrap area where the company stored and discarded
rubbish. The site is bordered by private properties and residences, woodlands, a small poultry
farm, the west branch of Riggs Brook, and its associated wetlands. In the 1950s, the company
began operating a salvage and electrical transformer recycling business at the site. Operations
included stripping and recycling transformers containing polychlorinated biphenyl (PCB)-laden
oil. In 1972, an oil spill at the site was found to have migrated towards Riggs Brook. Later that
year, at the request of the State, the company began containing all transformer fluids found on
the site in an aboveground storage tank to prevent future spills. When high levels of PCBs were
detected in the soils during sampling by the State in 1976, the company was instructed to build
two lagoons to control further migration of oils from the site. The upper lagoon, constructed with
a concrete retaining wall and a discharge system, and a lower lagoon, constructed with a
horizontal pipe discharge system and an earthen berm, were installed. To reclaim the lagoon
areas, the company pumped water from the lagoons into several on-site storage tanks and
excavated the lagoon sediments. These sediments were deposited into a low area and were
covered by approximately 1 foot of clay soil. This created a barrier for natural surface water
drainage from the site to Riggs Brook and resulted in the formation of a marsh behind the on-site
barn. Approximately 50 people live within a 1/4-mile radius of the site. The distance from the
site to the nearest residence is less than 500 feet.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
July 1995
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Threats and Contaminants
On-site groundwater is contaminated with PCBs and the volatile organic compound
(VOC), dichlorobenzene. On-site soil is contaminated with PCBs, lead, and various
carcinogenic polycyclic aromatic hydrocarbons (PAHs). PCBs, aluminum, and lead
have been detected in standing surface water on the site. People who trespass on the
site could be threatened by coming into direct contact with or accidentally ingesting
contaminants in soils, sediments, groundwater, or surface water. In addition, eating
fish, waterfowl, livestock, or plants that may have become contaminated poses a threat
to people. The site is currently surrounded by a chain-link fence and is posted with
appropriate warning signs.
Cleanup Approach
The site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: In 1984, the O'Connor Company built a fence around the
property and posted warning signs along approximately 5 acres of the site. The
owner also sampled and analyzed the contents of all drums and storage tanks on the
site and removed them. In 1987, Central Maine Power extended the fence to areas where
additional contamination was found, and removed additional contaminated material from the site.
Entire Site: The remedies selected by the EPA to address site contamination include
pumping 150,000 to 195,000 gallons of surface water from the upper and lower
lagoons and marsh and removing it to an EPA-approved off-site treatment facility,
and treating 23,500 cubic yards of contaminated soils and sediments using solvents to extract
contaminants. The contaminated liquid from this process will be incinerated off site. The residues
that contain high levels of lead will be treated by solidifying the material and removing it. The
site will be restored by backfilling, and the potentially responsible parties will establish wetlands
to replace those lost during cleanup. Groundwater will be collected, filtered, and treated to
contain or remove the contaminants. The potentially responsible parties are conducting the design
activities, which involve treatability studies and aquifer testing. The actual cleanup will begin
when the design activities are completed, expected in the fall of 1995.
July 1995 2 O'CONNOR COMPANY
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Site Facts: In 1984, the EPA issued an Administrative Order to the O'Connor Company,
requiring construction of a fence, posting of warning signs, and analysis of the contents of all
drums and storage tanks found on the site. In 1986, the EPA issued an Administrative Order to
the company and Central Maine Power to conduct an investigation into the nature and extent of
contamination at the site and to identify alternatives for site cleanup. In 1986, the State also
issued Orders to the potentially responsible parties, requiring the removal of the hazardous
substances present in tanks and containers at the site. In 1987, the EPA and the State issued a
joint Administrative Order to O'Connor and Central Maine Power to investigate the nature and
extent of contamination and to identify alternatives for cleanup, and to extend the existing 5-acre
fence to cover an additional 4 acres. In 1990, the EPA and Central Maine Power signed a
Consent Decree to perform the design of the cleanup and the cleanup itself.
Environmental Progress
The construction of a fence which limits access to the contaminated areas of the site and the
removal of drums and storage tanks have reduced the potential for exposure at the O'Connor
Company site. The cleanup remedies selected by the EPA will further reduce site contamination,
making the site safer as cleanup actions progress.
Site Repository
Lithgow Public Library, Winthrop Street, Augusta, ME 04330
O'CONNOR COMPANY
July 1995
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PINETTE'S
SALVAGE YARD
MAINE
EPA ID# MED980732291
Site Description
EPA REGION 1
Aroostook County
1 mile southwest of Washburn
Pinette's Salvage Yard covers 12 acres and consists of a vehicle repair and salvage yard. In
1979, three electrical transformers were removed from Loring Air Force Base by a private
electrical contractor and brought to the site, where they ruptured while being moved from the
delivery vehicle. Approximately 900 to 1,000 gallons of dielectrical fluids containing
polychlorinated biphenyls (PCBs) spilled directly onto the ground. The oil migrated through the
soil and may have contaminated groundwater and surface water. Land surrounding the yard is
used for residential, general industrial, and agricultural purposes. The nearest population center is
located approximately 1 mile northeast of the site. There are approximately 15 people living
within a 1/2-mile radius of the site. The distance to the nearest residence is about 250 feet from
the spill area. An undeveloped forest and a wetlands area are also adjacent to the site. The
Aroostook River, a major waterway in Northern Maine, is located approximately 1,500 feet from
the site. The water supply for the eight to ten residences located within a 1/2-mile radius is
obtained from private wells located in the deep bedrock aquifer below the site. Municipal wells,
used to supply the drinking water to local residents, are located 1 mile from the site.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
Threats and Contaminants
On-site groundwater and soil is contaminated with PCBs and volatile organic
compounds (VOCs) including benzene and chlorobenzene. Prior to cleanup, soil was
contaminated with PCBs. Current use of groundwater does not pose a threat because
the wells are located upgradient of the site.
July 1995
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Cleanup Approach
The site is being addressed in three stages: emergency actions and two long-term remedial phases
focusing on the source control and groundwater cleanup.
Response Action Status
Emergency Actions: In 1983, the EPA excavated 800 cubic yards of
PCB-contaminated soil and transported it to an approved disposal facility.
Source Control: The remedy originally selected in 1989 by the EPA to control the
source of contamination at the site included off-site incineration of PCB-contaminated
soil and on-site solvent extraction of an additional 1,700 to 1,900 cubic yards of
contaminated soil. Cleanup activities began in 1991, during which 410 cubic yards of highly
contaminated soil were excavated and incinerated off site. The solvent extraction treatment
process began in 1992, but as a result of poor performance, EPA amended the remedy in 1993 to
allow for off-site disposal of all remaining soil in a regulated landfill. Cleanup activities were
completed later that year. In total, 1,005 tons of soil were incinerated, 20 tons of soil were
treated using solvent extraction, and 5,103 tons were disposed of in an off-site regulated landfill.
Groundwater: The remedy selected by the EPA to clean up groundwater
contamination includes the installation of a groundwater collection system, and
treatment of the groundwater by pumping it through a granular filter and then using
carbon adsorption to remove the contaminants. Currently, the EPA is monitoring groundwater
conditions as a result of the activities described in the source control section above. During the
source control remedies, over 1,000,000 gallons of groundwater were treated. Monitoring
activities include annual sampling of residential wells and quarterly sampling of monitoring wells
on the site. It is anticipated that the results of the sampling will be incorporated into the final
design of the treatment system, which is scheduled to be completed in 1995.
Environmental Progress
Successful removal and treatment of PCB-contaminated soil has reduced the potential of exposure
to hazardous substances at the site, making the Pinette's Salvage Yard area safer. The EPA will
continue to monitor groundwater and residential wells to ensure that the source control cleanup
measures are effective while the groundwater treatment system is being designed.
1-5-1
Site Repository
Washburn Town Office, Main Street, Washburn, ME 04286
July 1995 2 PINETTE'S SALVAGE YARD
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PORTSMOUTH NA
SHIPYARD
MAINE
EPA ID# ME7170022019
Site Description
EPA REGION
York County
Kittery
The Portsmouth Naval Shipyard (PNS) is located on a 278-acre site, two-thirds of which is
covered by a high-density industrial area, containing 376 buildings. The shipyard is built on
Dennet's, Seavey's, Jamaica, and Clark's Islands, connected by 90 acres of fill. This filling of
the tidal flats gradually took place as the space needs of PNS increased. PNS was first
established in 1690 and became a Navy shipyard in 1800. The shipyard has been used for the
construction of ships and submarines and is currently used to overhaul nuclear propulsion fleet
ballistic missile submarines and attack submarines. PNS consists of three dry docks, 6,500 linear
feet of berthing, and 376 buildings and other structures. Hazardous wastes have been stored,
disposed of, spilled, or treated at more than 30 acres on the site. From 1945 to 1975, untreated
acidic and alkaline wastes, waste battery acid and lead sludge, wastewater and spent baths from
an electroplating operation, and other wastes from various industrial shops were discharged into
the Piscataqua River via industrial waste outfalls. From 1945 until approximately 1978, 25 acres
of tidal flats between two of the islands were filled with wastes including chromium-, lead-, and
cadmium-plating sludge; asbestos insulation; volatile organic compounds (VOCs); drums of waste
paint and solvents; mercury-contaminated materials; sandblasting grit containing various metal
wastes; and dredged sediments from the Piscataqua River. In the late 1970s, dredged sediment
samples collected near the industrial outfalls were found to be contaminated with elevated
concentrations of metals, polychlorinated biphenyls (PCBs), and other contaminants. The Navy
has indicated that the probable source of the sediment contamination is the industrial outfalls at
PNS. In addition, hazardous substances attributable to PNS are present at elevated levels in
wetlands bordering Seavey Island. Groundwater supplies drinking water to 10,000 people within
4 miles of the site. The mainland on both sides of the river in the immediate vicinity is a thickly
settled residential area with commercial/light industrial land use activities.
Site Responsibility:
The site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 06/23/93
Final Date: 05/31/94
July 1995
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Threats and Contaminants
Soils are contaminated with chromium-, lead-, and cadmium-plating sludge; asbestos
insulation; VOCs; waste paint and solvents; mercury and various other metal wastes.
Sediments contain elevated concentrations of metals, PCBs, and other contaminants.
Wetlands bordering Seavey Island have been found to be contaminated with hazardous
substances attributable to the PNS site. Salmon Falls, the Cocheco and Piscataqua
Rivers, the Great Bay estuary, and coastal tidal waters within 15 miles downstream of
PNS are used for commercial and recreational fishing. Extensive wetlands
communities exist along surface water bodies downstream of the PNS site.
Cleanup Approach
The site is being addressed in two phases: immediate actions and a long-term remedial phase
focusing on the cleanup of the entire site.
Response Action Status
Initial Actions: Seven of eight underground storage tanks were removed in 1994.
A temporary cap was constructed at the DRMO Storage Yard. The cap will prevent
wind dispersal, surface runoff of, and direct contact with, contaminated soils.
Entire Site: The EPA and the Navy are planning an investigation into the nature and
extent of contamination at the site. Once this investigation is complete, a remedy for
site cleanup will be selected.
Site Facts: In early 1989, the EPA issued a Hazardous and Solid Waste Amendments Permit to
PNS requiring corrective action to be taken at 13 of the 28 solid waste management units.
Environmental Progress
Capping the DRMO Storage Yard and removing underground storage tanks is protecting the
safety of the public and the environment while the EPA is planning investigations into the nature
and extent of contamination at the Portsmouth Naval Shipyard site.
Site Repository
Rice Public Library, 8 Wentworth Street, Kittery, Maine 03904
July 1995
PORTSMOUTH NAVAL
SHIPYARD
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SACO MUNICIPAL
LANDFILL
MAINE
EPA ID# MED980504393
Site Description
EPA REGION 1
York County
Saco
The Saco Municipal Landfill covers approximately 90 acres and has been owned and operated by
the City of Saco since 1960. The site consists of four distinct disposal areas. Area 1 is a closed
and capped municipal dump that was used for open burning of household and industrial waste.
Area 2 is an inactive industrial dump that accepted bulk and demolition debris. Area 3 is a
relatively small area of about 1 acre in which wastes such as tires and leather and rubber scraps
from local industries were dumped. This uncovered area is located on the outside of the service
road that circles Area 4. Area 4 is a recently closed landfill that accepted household waste and
tannery sludge containing chromium and other heavy metals, as well as volatile organic
compounds (VOCs). The sludge was placed in unlined trenches, often directly in contact with
groundwater. Area 2 has a leachate collection system, but there is no evidence of liners or
leachate systems in other disposal areas. There are approximately 32,000 people living within a
3-mile radius of the site. Approximately 130 people live within 1 mile of the site. Water and
sediment in Sandy Brook, which flows through the site, and groundwater beneath the site have
shown elevated levels of various metals and organics. Approximately 700 people obtain drinking
water from wells within 3 miles of the landfill. In 1975, the Biddeford and Saco Water Company
extended water lines along Jenkins Road and Route 112.
Site Responsibility:
The site is being addressed through
Federal, State, and municipal actions.
NPL LISTING HISTORY
Proposed Date: 06/24/88
Final Date: 02/21/90
Threats and Contaminants
Wastes produced by local industries may be the source of contaminants in the
groundwater, surface water, sediments, and soil in the Saco Landfill site. Industries in
the area produce leather goods, plastics, vinyl stripping, machine parts, textiles, foam
products, and finishes. Typical wastes from these industries include heavy metals,
chromium, solvents, dyes, polymers, and phthalates. The groundwater contains
elevated levels of VOCs and heavy metals including iron, manganese, and toluene.
Sandy Brook has been shown to be contaminated with elevated levels of heavy metals
and VOCs. The site is only partially fenced, making it possible for people and animals
to come into direct contact with hazardous substances. People who come into direct
contact with or accidentally ingest contaminated groundwater, surface water, or soil
sediments may be at risk. Surface waters in Sandy Brook can also transport
contamination off site.
July 1995
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Cleanup Approach
The site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on cleanup of the entire site.
Response Action Status
Initial Actions: The City of Saco, in conjunction with the Maine Department of
Environmental Protection (MEDEP) and the EPA, removed and disposed of the
wastes from Area 3 in mid-1991. These wastes are not hazardous and include leather
and rubber scraps from local industry. MEDEP oversaw the removal actions to ensure that no
hazardous substances were discovered or disposed of.
Entire Site: The parties potentially responsible for contamination at the site will
conduct an investigation into the nature and extent of the contamination. The
investigation will also recommend alternatives for the final cleanup. The investigation
is scheduled to begin in 1995.
Environmental Progress
The removal and disposal of wastes from Area 3 have made the Saco Municipal Landfill site
safer while the EPA plans the investigation of the site.
Site Repository
City Hall, 300 Main Street, Saco, ME 04072
July 1995
SACO MUNICIPAL LANDFILL
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SACO TANNERY
WASTE PITS
MAINE
EPA ID# MED980520241
Site Description
EPA REGION 1
York County
Saco
The 212-acre Saco Tannery Waste Pits site was operated from 1959 until 1981, when the Saco
Tannery Corporation filed for bankruptcy and stopped site operations. The site was used as a
disposal area for process wastes such as chromium sludges, acid wastes, methylene chloride, and
caustic substances. More than 23 million gallons of wastes were deposited in two lagoons and 53
disposal pits. Several types of wastes were deposited in Chromium Lagoon 1 until 1968. Waste
streams were separated, and Chromium Lagoon 2 was constructed in 1969 only for chromium
and solid wastes. Smaller pits were built for acid wastes from the grease-rendering fleshing
process and for caustic wastes from the patent leather process. The site is bordered by the Maine
Turnpike, Flag Pond Road, residential property on Hearn Road, and the Scarborough town line.
Access to the site is controlled by a fence along the Maine Turnpike and Flag Pond Road, with a
locking gate at the entrance on Flag Pond Road. Groundwater is the source of drinking water for
residents located south and west of the site. Approximately 20 residences are located within
1,000 feet of the site and 2,600 people live within a 3-mile radius of the site. Because the area is
heavily wooded and is inhabited by a variety of wildlife, it is frequently used by hunters. The site
is also used by snowmobilers in the winter.
Site Responsibility: This site is being addressed through
Federal and State actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
Threats and Contaminants
Groundwater is contaminated with arsenic. Groundwater testing also has revealed that
chromium and lead concentrations are elevated, but still within acceptable limits.
Sediments are contaminated with antimony and heavy metals. The soil is contaminated
with antimony, volatile organic compounds (VOCs), and heavy metals. Trespassers
who come into direct contact with or accidentally ingest contaminated groundwater,
soil, or sediment may be at risk. The surrounding wildlife and the wetlands, which
cover a large portion of the site, may be at risk from the contamination.
July 1995
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Cleanup Approach
Response Action Status
Immediate Actions: In 1983, the EPA removed corrosive liquid from three acid
pits and disposed of it at a federally-approved facility. The EPA also neutralized the
remaining sludge hi the three pits with lime, covered them with caps, and erected a
fence across the access road to the property.
Entire Site: The EPA and the State of Maine conducted an investigation into the
nature and extent of contamination at the site. The selected remedy for site cleanup
includes: covering waste in disposal pits and lagoons with geotextile fabrics and 4 to 6
feet of soil; monitoring the groundwater to detect any continued contamination; and designating
the area as a permanent conservation zone to be protected by the State of Maine. Institutional
controls to limit the use of land and groundwater were put into effect in late 1991. All
construction activities were completed in 1993. Groundwater monitoring is ongoing.
Site Facts: With the construction of the soil covers over the lagoons and pits, 10 acres of
wetlands were permanently lost. To compensate for this loss, the EPA and the Maine Department
of Environmental Protection agreed to purchase 247 acres of a unique ecological property 2 miles
from the site. This approach to wetlands compensation is one of the first hi the nation for
Superfund. This approach was taken because there was no suitable area on site for creating new
wetlands and the property purchased was threatened from mining operations.
Environmental Progress
Construction of all cleanup remedies has been completed. The removal of liquid wastes, the
neutralization of sludges, the capping of three pits, and institutional controls have reduced the
potential of exposure to hazardous substances surrounding the acid pit areas, and have protected
the public health and the environment.
Site Repository
Dyer Library, 371 Main Street, Saco, ME 04072
July 1995 2 SACO TANNERY WASTE PITS
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UNION CHEMIC
COMPANY, IN
MAINE
EPA ID# MED042143883
Site Description
EPA REGION 1
Knox County
Along the south side of
Route 17, west of South Hope
The 12-acre Union Chemical Company, Inc. site began operations in 1967 as a formulator of
paint and coating strippers. In 1969, the company expanded its operations and began handling
and recovering petrochemical-based solvents. In 1979, as part of the recovery process, the
company added a fluidized bed incinerator to burn contaminated sludges, still bottoms, and other
undetermined hazardous wastes. Some of these types of waste were burned in an on-site boiler
that provided heat and operating power to the facility. Between 1979 and 1984, the plant was
cited by the State for deficiencies or violations of several operating licenses. The State closed the
waste treatment operations in 1984, at which time approximately 2,000 drums and 30 liquid
storage tanks containing hazardous waste were stored on the site. The on-site soil and
groundwater contamination resulted from improper handling and operating practices such as
leaking stored drums, spills, use of a septic tank and a leachfield for disposal of process
wastewater, and could also be attributed to past disposal methods. There are approximately 200
people living within a 1/2-mile radius of the site. These residents depend on groundwater for
domestic use. The site is bounded by Quiggle Brook and is partially in the 100-year flood plain.
Grassy Pond is less than a mile east of the site and is an alternate drinking water source serving
approximately 22,800 people in the Towns of Camden, Rockport, Rockland, and Thomaston.
Site Responsibility:
The site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 04/10/85
Final Date: 10/04/89
Threats and Contaminants
m
Buildings and other plant facilities contain heavy metals, dioxins, and asbestos.
Approximately 21/2 acres of the site are fenced and contain the former processing
buildings, two aboveground storage tanks, a former drum storage area, and
incinerator facilities. On-site groundwater and soils are contaminated with volatile
organic compounds (VOCs) including toluene, 1,1,1,-trichlorethane, 1,1-
dichlorethane, and others. Off-site surface water contamination has occurred through
discharges of contaminated process wastewater into the adjacent Quiggle Brook and
possibly through natural discharge of contaminated groundwater into the brook.
People who come into direct contact with or accidentally ingest contaminated
groundwater could be at risk.
July 1995
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Cleanup Approach
The site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on cleanup of the entire site.
Response Action Status
Immediate Actions: In 1984, the State and the EPA collectively removed all
surface drums, over 100,000 gallons of liquid wastes and sludges from aboveground
storage tanks, and some contaminated soil from the site.
Entire Site: Based on results of site investigations, the EPA selected the following
remedies in 1990: soil excavation and on-site low-temperature soil aeration treatment;
vacuum-enhanced groundwater extraction, on-site groundwater treatment, and on-site
discharge of treated groundwater into Quiggle Brook; facilities decontamination and demolition,
and off-site disposal of debris; and further monitoring and analysis of off-site soils to determine
whether contamination is present as a result of past site operations. Throughout all phases of the
data collection and analysis effort, the EPA will determine if additional cleanup actions are
required. The design for these remedies began in late 1991 and is scheduled to be completed in
1995. In 1993, the facilities decontamination and demolition was completed. In 1994, the EPA,
with the Maine Department of Environmental Protection and community concurrence, adjusted
the treatment to soil vapor extraction of the contaminated soils. In addition, the groundwater
extraction system will be significantly expanded to clean up groundwater more quickly at the site.
In late 1994 and early 1995, the EPA began limited source control actions in preparation for the
soil vapor extraction and groundwater extraction systems.
Site Facts: In 1987 and 1988, the EPA, the State, and 288 parties potentially responsible for
contamination at the site entered into two Administrative Orders. In these Orders, the parties
agreed to conduct an investigation to examine the possible cleanup alternatives and reimburse the
EPA and the State for approximately 80 percent of past cleanup costs. In 1989, the EPA entered
into a Consent Decree with nine additional potentially responsible parties where the parties agreed
to reimburse the EPA for additional incurred past costs and certain litigation costs. In 1991, the
EPA entered into a Consent Decree with the past owner/operator for reimbursement of additional
EPA past costs and for a Resource Conservation and Recovery Act (RCRA) Administrative
Order violation from 1987. Also in 1991, the EPA filed three separate Consent Decrees with
three potentially responsible parties for violations. A Consent Decree between EPA, the State,
and 60 potentially responsible parties was issued in 1991 formalizing an agreement for the parties
to support site cleanup. In early 1992, EPA, the State, and 270 potentially responsible parties
formalized a settlement agreement.
Environmental Progress
The removal of contaminated drums, tanks, and soil has reduced the potential for exposure to
contamination at the Union Chemical Company, Inc. site while final cleanup remedies are
underway.
July 1995 2 UNION CHEMICAL COMPANY, INC.
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Site Repository
Hope Town Office, Route 105, Hope, ME 04847
UNION CHEMICAL COMPANY, INC.
July 1995
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WINTHROP
LANDFILL
MAINE
EPA ID# MED980504435
EPA REGION 1
Kennebec County
Winthrop
Site Description
The Winthrop Landfill is a 13-acre site located along the western shore of Lake Annabessacook
and consists of two adjacent properties, the Winthrop Town Landfill and the privately owned
Savage Landfill. The site initially was used in the 1920s as a sand and gravel pit. In the 1930s,
parts of the site received municipal, commercial, and industrial wastes. The site accepted
hazardous substances between the early 1950s and mid-1970s. It is estimated that more than 3
million gallons of chemical wastes, mostly complex organic compounds including resins,
plasticizers, solvents, and other process chemicals, were disposed of at the site. Late in 1979, the
Town attempted to expand the landfill, but this revealed numerous rusting and leaking barrels.
The Town decided to close the landfill and construct a transfer station on the site. The Savage
Landfill contracted to accept municipal solid waste and debris from two small neighboring towns
and also accepted wastes from Winthrop to extend the life of the town landfill. Wastes were
openly burned until 1972, and landfilling occurred from 1972 until 1982. There are 63 residences
within 1/2 mile of the site. Wetlands are located near the site, and Lake Annabessacook is used
for recreational purposes.
Site Responsibility:
The site is being addressed through
Federal, municipal, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/23/81
Final Date: 09/08/83
Threats and Contaminants
Volatile organic compounds (VOCs) from the landfill were found to be migrating off
site into the groundwater. The soil has been contaminated from drums containing
inorganic and organic chemicals and municipal wastes. Potential risks exist if
contaminated soil or groundwater is accidentally ingested. The area is fenced and
capped to protect against direct contact with contamination. Wetlands located near the
site are potentially at risk from site contamination.
July 1995
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Cleanup Approach
The site is being addressed in three stages: immediate actions and two long-term remedial phases
focusing on cleanup of the entire site and groundwater and surface water.
Response Action Status
Immediate Actions: The potentially responsible parties and the Town of Winthrop
have extended the municipal water supply to residents previously on well water
drawn from a contaminated aquifer below the landfill.
Entire Site: An impermeable clay cover was built over the landfill to contain the
landfilled wastes, thereby reducing the quantity of contaminated leachate entering the
groundwater. A fence was erected around the landfill to protect against direct contact
with site contamination and deed restrictions imposed, prohibiting the use of the landfill for
activities other than the cleanup actions, excavation in the area of the landfill, and groundwater
use in the area. All cleanup activities were completed in 1992. Long-term monitoring of
groundwater, surface water, and sediments is ongoing on a quarterly basis to ensure the
effectiveness of the clay cover.
Groundwater and Surface Water Treatment: The potentially responsible parties
installed a vapor extraction and treatment system to remove contamination from the
landfill waste to keep it from infiltrating into the groundwater. The vapor extraction
plant began operating in late 1994. The potentially responsible parties are currently building a
groundwater extraction and treatment system to contain, treat, and eliminate groundwater and
surface water contamination. Construction is expected to be completed in 1995.
Site Facts: A Consent Decree ordering the potentially responsible parties to perform the above
actions was signed by the EPA and the parties and filed with the U.S. District Court in 1986. In
1993, the overall performance of the groundwater extraction system was enhanced.
Environmental Progress
The provision of an alternative water supply to affected residences in the area of the Winthrop
Landfill, the installation of a fence to restrict site access, the construction of a clay cap over
landfill wastes and the operation of a vapor extraction system to reduce contamination within the
landfill, preventing further migration of contaminants into the groundwater have eliminated the
threat of direct contact with contaminants at the site while remaining cleanup actions are being
implemented.
July 1995 2 WINTHROP LANDFILL
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Site Repository
Winthrop Town Hall, 574 Main Street, Winthrop, ME 04364
Cobbassee Watershed District Office, 15 High Street, Winthrop, ME 04364
WINTHROP LANDFILL
July 1995
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