&EPA
United States
Environmental Protection
Agency
Solid Waste And
Emergency Response
(5201 G)
EPA/540/R-95/098
PB95-962930
9200.5-728 C
May 1995
SUPERFUND:
Progress at
National
Priority
List Sites
NEBRASKA
1995 UP DATE
Pnnted on Recycled Paper
-------
How to Use the NPL Book
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.
-------
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
EPA ID# ABCOOOOOOO
Site Description
EPA REGION XX
COUNTY NAME
LOCATION
Otter Names:
: xxx xxxxx xxxxxxxxxxxx xxxxxx xxxxxxxxx xxxxxxxx xxxxxxxxxxxxx :
: xxxxxxxxxx xxxx xxxxxxxx xxxx xx xxxxxxxxx xx xxxxxx xxxxxxxx \
: xxx xxxxxxxxxxxxx xx xxxxxx xxxx xxxxx xxxx x xxx :
XXXXXXX XXX XXXJEXM^XXXXX XXXXX XXXXXX XXXXXXXX XXXXXXXX XXXX XXXXXXXXXX ;
xxxxxxxxxxxx xxxxxxxxx""5&i«^x xxx xx xxxxxxxxx xxxxx xxxx xxxx xxxxx xxxxxxx xxxxxxxx
xxxxxxxx xxxxxxxxx xxxx xxxxfe&wqExxxx xxxxxxxx xxxxx xxxx xxxxx xxx xxx xxxxxx
XXXXXXXXXXXX XX XXXXXXX XXX XXXXXxSBftBS.JCXX XXXXXX XX XXXX XXX XXXXX XXX XXXXX XXX XXXXX
Site Responsibility:
xxxxxx xxx 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
XXXXXXXX XXX XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX
XXX XXXXXXXXXX XXXXXXXX XXXXXXX XXX XXXXXX XXXXXX XXXXX XXXXXX
XXXXXXXX XXXX XXXXXXXXXX XXXXXXXX XXXXXXXXXXXX XXXXXXXXX XXXX X XXX XX
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 :
XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX XXXXX XXXX X :
XXXXXXXX XXXXXXX XXX XXXXXX XXXXXX XXXXX XXXXXX XXXXXXXX XXXXXXXX ]
XXXXXXXXXX XXXXXXXX XXXXXXXXXX. X 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 :
dlte I aCTS! 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
^^i^exxxxx :
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.
-------
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.
-------
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 Groundwater 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.
-------
EPA ID
Number
NED981713837
NED986369247
NED981713829
NED981499312
NE2213820234
NED980862668
NED068645696
NE6211890011
NED084626100
NED980862718
Site Name
10TH STREET SITE
AMERICAN SHIZUKI/OGALLALA ELECTRONICS CO
BRUNO CO-OP ASSOCIATION/ASSOCIATED PROPERTIES
CLEBURN STREET WELL
CORNHUSKER ARMY AMMUNITION PLANT
HASTINGS GROUND WATER CONTAMINATION
LINDSAY MANUFACTURING CO.
NEBRASKA ORDNANCE PLANT (FORMER)
SHERWOOD MEDICAL CO.
WAVERLY GROUND WATER CONTAMINATION
-------
10TH STREE
NEBRASKA
EPA ID# NED98171383^
EPA REGION 7
Platte County
Columbus
Other Names:
'Columbus Public Water Supply
Site Description
The 10th Street Site consists of nine municipal wells located in and around the City of Columbus.
EPA sampling has revealed that several of the municipal drinking water supply wells are
contaminated with volatile organic compounds (VOCs). Groundwater in the vicinity of the
municipal well field is also contaminated with VOCs. The highest contaminant level in a
monitoring well was detected under a city parking lot that formerly was used as a scrap metal
yard. Among potential sources of soil contamination are a dry cleaning facility behind the lot
and a laundromat. The municipal wells provide drinking water to approximately 18,600 people.
All the wells use the alluvial aquifer, which is known to have been contaminated, as their water
source.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 10/26/89
Final Date: 08/30/90
Threats and Contaminants
The groundwater serving municipal wells is contaminated with the VOCs
tetrachloroethylene (PCE) and trichloroethylene (TCE). PCE and TCE also have been
found in the soil. People could be exposed to these contaminants through the use of
the municipal water supply. Additional exposure is possible if private wells are
installed and used in areas of high levels of groundwater contamination.
Cleanup Approach
This site is being addressed in a long-term remedial phase focusing on cleanup of the entire site.
Response Action Status
Entire Site: The EPA has begun an investigation of the site to evaluate the nature
and extent of contamination. The EPA is considering a remedy to contain
groundwater contamination. After completion of the investigation, scheduled for late
1994, the EPA will be able to determine the best methods for the site cleanup.
December 1994
-------
Environmental Progress
After adding this site to the NPL, the EPA performed preliminary investigations and determined
that no immediate actions were required at the 10th Street Site while studies are taking place and
cleanup activities are being planned.
Site Repository
Columbus Public Library, 2504 Fourteenth Street, Columbus, ME
December 1994
10TH STREET SITE
-------
AMERICAN
OGALLALA
ELECTRONI
NEBRASKA
EPA ID# NED986369247
EPA REGION 7
Keith
estern part of Ogallala
Site Description
The American Shizuki Corp./Ogallala Electronics Co. site consists of two properties
approximately 15 acres and 1 acre in size, respectively. These properties, a block apart from
each other, are located in the western part of Ogallala along the South Platte River. The area is
primarily industrial, commercial, and residential. The first of the two properties has been used
to manufacture electrical components since the early 1960s. The facility on this property was
owned and operated by TRW, Inc. until 1986. American Shizuki Corp. took over the operations
in 1987. Ogallala Electronics, which occupies the second property, also manufactures electronics
components. The Nebraska Department of Health (NDH) first detected volatile organic
compounds (VOCs) in five of the nine municipal wells serving Ogallala in 1987. The two
companies were identified as the source of contamination during subsequent investigations.
Public and private wells within 4 miles of the site supply drinking water to an estimated 5,100
people; the water from these wells also is used for irrigation.
Site Responsibility:
The site is being addressed through
Federal and State actions.
NPL LISTING HISTORY
Proposed Date: 10/14/92
Threats and Contaminants
Various VOCs, including trichloroethane (TCE) and trichloroethane (TCA), were
detected during a soil-gas survey conducted by the Nebraska Department of
Environmental Control (NDEC) in mid-1990. These contaminants were used by both
operations. Similar contaminants have been detected in monitoring wells in and around
both properties and in numerous municipal wells.
Cleanup Approach
This site is being addressed in a long-term remedial phase focusing on cleanup of the entire site.
November 1994
-------
Response Action Status
Entire Site: The EPA began an investigation into the nature and extent of
contamination and other possible sources of contamination in the fall of 1994. After
this investigation, the EPA will select a remedy to clean up site contamination.
Environmental Progress
Initial assessments of the American Shizuki Corp./Ogallala Electronics and Manufacturing, Inc.,
site indicate that the site poses no immediate threats to the health of the nearby population or the
integrity of the environment while a full-scale study into site conditions is underway.
Site Repository
Not yet established.
November 1994
AMERICAN SHIZUKI/
OGALLALA ELECTRONICS CO.
-------
BRUNO CO-
ASSOCIATI
ASSOCIATED
PROPERTIES
NEBRASKA
EPAID#NED981713829
Site Description
EPA REGION 7
Butler County
Bruno
The Bruno Co-op Association/Associated Properties site consists of two contaminated municipal
wells in Bruno. One well is located at the intersection of Pine and Third Streets. The second
well, 1,000 feet northwest of the first, is located on property mat has been used to store grain
since the 1940s. The site was originally owned by C & NW Railway Co. From 1947 to the
1960s, part of the property was leased to the U.S. Department of Agriculture (USDA), which
used it as a Federal grain storage facility. Local farmers purchased all but one of the corn crib
bins in 1964 and moved them off site. Bruno Co-op purchased the remaining bin. In 1988, the
company also purchased Wagner Mills, Inc., a second business operating on the site. Currently,
Bruno Co-op has two functional bins. Volatile organic compounds (VOCs) were first detected in
1986. These contaminants had been poured or pumped into the grain as fumigants. The
surrounding area is primarily agricultural, commercial, and residential.
Site Responsibility: The site is being addressed through
Federal and State actions.
NPL LISTING HISTORY
Proposed Date: 10/14/92
Threats and Contaminants
Both the EPA and the Nebraska Department of Health (NDH) conducted tests from
1986 to 1988 and detected various VOCs, including carbon tetrachloride, and
chloroform, in me two wells. Elevated levels of carbon tetrachloride have been
identified in the Fremont well and the grain storage facilities. People who touch or
ingest contaminated groundwater could be at risk.
November 1994
-------
Cleanup Approach
This site is being addressed in two stages: initial actions and a long-term remedial phase focusing
on the cleanup of the entire site.
Response Action Status
Initial Actions: The EPA supplied bottled water to 150 residents of Bruno from
mid-1989 to late 1990 as the Bruno Public Water Supply Co. constructed new wells.
Entire Site: An investigation into the nature and extent of contamination is being
planned. After the investigation is completed, the EPA will select a final remedy to
clean up site contamination.
Site Facts: The EPA has identified four parties potentially responsible for site contamination in
addition to Bruno Co-op and the USD A.
Environmental Progress
By providing a drinking water supply to affected residents, the EPA has reduced immediate
threats posed to the nearby population. Additional cleanup activities will be selected following a
full-scale study into site conditions.
Site Repository
Not yet established.
November 1994 2 BRUNO CO-OP ASSOCIATION/
ASSOCIATED PROPERTIES
-------
CLEBURN
WELL
NEBRASKA
EPA ID#NED981499313
EPA REGION 7
Hall County
Grand Island
Site Description
The Cleburn Street well was once a drinking water source for the City of Grand Island. The
municipal water system, serving 38,500 people, consists of 12 wells within city limits and 12
wells in the Platte River Island Well field southeast of the city. Now disconnected from the
municipal water supply, the contaminated Cleburn Street well was found to be contaminated by
tetrachloroethylene (PCE) in 1986. Subsequent studies indicated PCE-contamination in the
ground water and sub-surface soils. Results of EPA investigations indicate four separate areas of
contamination: a former solvent company; and three dry cleaners who have used or stored PCE.
The EPA is currently investigating the extent of contamination at all four areas and is evaluating
cleanup alternatives. Some 1,100 residents not served by the municipal water system draw water
from shallow private wells. The Cleburn Street Well is within 4 miles of food and forage crops
irrigated by 333 wells.
Site Responsibility:
This site is being addressed by Federal
actions.
NPL LISTING HISTORY
Proposed Date: 07/29/91
Final Date: 10/14/92
Threats and Contaminants
PCE and other volatile organic compounds (VOCs) were first discovered in the
Cleburn Street well in 1986. PCE also was detected in on-site soils. Recent studies
show PCE contamination of the shallow groundwater used by the city for drinking
water. Ingestion of, or other contact with, contaminated groundwater or soil is a risk
to public health.
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.
November 1994
-------
Response Action Status
Immediate Actions: The Cleburn Street well was disconnected from the municipal
water supply in 1986. In the summer of 1993, the EPA began pumping to contain the
most highly contaminated groundwater and to prevent further migration of the
contaminants toward other municipal wells.
Entire Site: The EPA conducted a soil-gas investigation in 1988; PCE and other
VOCs were detected in three areas on site. Site-wide investigations into the nature and
extent of groundwater and soil contamination were initiated in 1991 and are expected
to be completed in late 1994. The EPA currently is evaluating alternatives for long-term cleanup
of groundwater and subsurface soils at each of the source areas.
Environmental Progress
Disconnecting the contaminated Cleburn Street well from the municipal water supply and
containing the contaminated groundwater plume to prevent further migration of contaminants
toward other municipal supply wells reduced the risk of residents coming into contact with
contaminants from the site while investigations leading to final cleanup are underway.
Site Repository
Edith Abbott Memorial Library, 211 N. Washington Street, Grand Island, NE 68801
November 1994 2 CLEBURN STREET WELL
-------
CORNHUSK
AMMUNITIC
PLANT
NEBRASKA
EPA ID#NE221382023
Site Description
EPA REGION 7
Hall County
miles west of Grand Island
The 19-acre Cornhusker Army Ammunition Plant is a U.S. Army Armament, Munitions, and
Chemical Command facility. On standby status since 1973, the operation leases 16 square miles
of land for agriculture, grazing, and wildlife management activities. The plant was built in 1942
to produce munitions and to provide support functions during World War n and has gone in and
out of production over the years. It consists of five major components: (1) five major production
areas where munitions were loaded, assembled, and packed; (2) a fertilizer manufacturer; (3) two
major storage facilities; (4) a sanitary landfill; and (5) a burn ground where materials
contaminated with explosives were ignited. When the plant was active, staff disposed of
wastewater contaminated with explosives into 56 earthen surface impoundments, which were
located near the five production areas. Dried solids from the bottom of the pits periodically were
scraped and ignited at the burning ground. Releases from the surface impoundments have
contaminated about 500 private wells. Activities at the site currently are limited to maintenance
and leasing operations. Once the environmental studies required for real estate transactions are
completed, tile Army plans to sell the property. Polluted groundwater has migrated off the site
and has been detected as far as 3V4 miles beyond the plant's border. The area affected by
groundwater contamination is mostly suburban, and residents rely on public and private wells for
drinking water. Approximately 3,000 people live within 1 mile, and 27,000 live within 3 miles of
the site. Groundwater also is used for farmland irrigation and for watering livestock.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 07/22/87
Threats and Contaminants
Groundwater both on and off the site are contaminated with various explosives. Soils
are contaminated with various explosives and heavy metals such as lead, chromium,
and cadmium. Human and livestock health can be adversely affected by drinking the
contaminated groundwater or through direct contact with contaminated soil.
December 1994
-------
Cleanup Approach
This 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: The Army provided bottled water to the 250 homes with
contaminated wells until residences could be hooked up to the city's water system. In
1986, the municipal water system was extended to 800 residences in Grand Island.
A dewatering system was completed to control the high water table. In 1987, the Army started
an incineration program to treat the contaminated soil hi the 56 surface impoundments. Workers
excavated the soil and then incinerated it to destroy the contaminants. The excavated pits were
backfilled with sand and gravel from off the site, and the ash from the incinerator was landfilled
on the site. The Army had burned 40,000 tons of soil by 1988, when the State-monitored
operation ended. In 1991 and 1992, the Army began providing bottled water to additional homes
with contaminated wells. This will continue until residences can be hooked up to the city's water
system, expected to be completed in 1995. In addition, the EPA constructed a protective barrier
around me burning grounds unexploded ordinance in 1993.
Entire Site: An investigation by the Department of the Army in 1990 identified
several areas of potential contamination. The Army is investigating the plume of
groundwater that has moved off the site to determine the types and levels of
contaminants present, and the extent of its threat to human health and the environment. The
Army submitted a draft report on their investigation hi early 1993, but the EPA, the Army, and
the State of Nebraska agreed that additional work would be necessary due to data gaps. This
work involved dividing the site into smaller areas to facilitate the additional field work required.
A Focused Feasibility Study to study ways to prevent further contaminant migration for the
groundwater contaminated with explosives was completed in 1994. An interim cleanup remedy
involving groundwater containment was signed in 1994. Additional fieldwork is planned for the
second area in 1995.
Site Facts: Cornhusker Army Ammunition Plant is participating in the Installation Restoration
Program, a specially funded program established by the DOD in 1978 to identify, investigate,
and control migration of hazardous contaminants at military and other DOD facilities. An
Interagency Agreement between the EPA, Nebraska Department of Environmental Control
(NDEC), and the DOD was signed in 1990. Under this Agreement, the Army will investigate and
clean up the site.
December 1994 2 CORNHUSKER ARMY AMMUNITION PLANT
-------
Environmental Progress
The continuing extension of the municipal water supply to over 800 residences and the provision
of bottled water to additional homes has reduced the potential of exposure to hazardous
substances in the drinking water. The incineration of contaminated soil has reduced other
pathways of contamination at the Cornhusker Army Ammunition Plant. These actions will protect
the public health and the environment while further studies are conducted and cleanup activities
are being planned.
Site Repository
Grand Island Public Library, 211 North Washington Street, Grand Island, NE 68802
Cornhusker Army Ammunition Plant, 102 North 60th Road, Grand Island, NE 68803
CORNHUSKER ARMY AMMUNITION PLANT
December 1994
-------
HASTINGS
GROUND W
CONTAMIN
NEBRASKA
EPA ID# NED980862668
EPA REGION 7
Adams County and Clay County
City of Hastings
Other Names:
Blayney Ammunition Depot
tayney ExNaval Ammunition Base
Hastings Plume
Former Naval Ammunition Depot (NAD)
Site Description
Approximately 23,000 people live in the City of Hastings. Like most communities, industries
have expanded to areas outside of the city limits. Farms and pastures surround the urban area,
and many private and public wells lie within a 3-mile radius of the city. Ground water is used to
irrigate crops and water stock and provides water for home and business use. A nearby stream
and lake are used for recreation.
Concerns regarding volatile organic compounds (VOCs), including commercial grain fumigants hi
the Hastings city water supply, were investigated by the State in 1983. As a result, Hastings took
two municipal supply wells out of service and placed other contaminated wells on a standby
basis. Community Municipal Services, Inc. (CMS), a private water supply system serving the
areas east of Hastings, also took two of its three wells off-line due to pollution. Frequent testing
by the City and the State is conducted to assure that the water supplied to users by these two
utilities is safe to drink.
Due to the size and complexity of the Hastings site, the following site description is organized
into its four geographical areas: Central Industrial Area; Commercial Area; Hastings East
Industrial Park/Former Naval Ammunition Dump; and South Landfill.
Central Industrial Area: This area encompasses commercial and industrial properties situated
in the heart of Hastings, along the Burlington-Northern railroad right-of-way. The three subsites
that make up mis area are Colorado Avenue, Second Street, and Well #3. Three different
industrial solvents have been detected in soils around Colorado Avenue. The source is suspected
to be industrial discharges into the storm or sanitary sewers along this street. The Second Street
subsite was identified during the 1987 to 1988 investigation of Colorado Avenue. Pollution from
an old coal gas plant operation was detected in the soil at this subsite and in the downgradient
ground water. Contaminants include VOCs, polycyclic aromatic hydrocarbons (PAHs), and
phenols. Well #3 subsite, named for M-3, one of the city wells taken out of service, is
contaminated with carbon tetrachloride (CC14), a grain rumigant. A second plume of
contaminated ground water was identified in EPA's most recent investigation.
Commercial Area: This area, east of the Hastings city limits, contains the FAR-MAR-CO and
North Landfill subsites. Operators of the FAR-MAR-CO subsite stored and handled agricultural
products, mostly grams, for more than 30 years. VOCs, including toxic gram fumigants, have
seeped into the soils and ground water. Grain dust explosions and spills from fumigant equipment
on the subsite have contributed to the problem. While investigating soils at me FAR-MAR-CO
December 1994
-------
subsite, the EPA discovered trichloroethane (TCA) contamination on a portion now owned by a
different company. The new owner acknowledged the use of TCA as a metal cleaning solvent.
This area became the TCA Contamination Area portion of the subsite, which was cleaned up in
1989. The North Landfill originally was a local brickmaker's clay pit. Hastings operated it as a
landfill in the 1960s to dispose of various municipal and industrial wastes. Studies have revealed
that the FAR-MAR-CO and North Landfill subsites are polluting downgradient wells with VOCs.
Hastings East Industrial Park/Former Naval Ammunition Depot (NAD): The former
NAD, located about 2 miles east of Hastings, straddles two counties: Clay and Adams. The
48,000-acre NAD was used for loading armaments until the early 1950s, and later for the
demilling of armaments until it was decommissioned in the early 1960s. The U.S. Army Corps of
Engineers is conducting studies at the site under the authorization of the Department of Defense
(DOD). The Corps has discovered that explosives, heavy metals, and VOCs are the major
contaminants Although contaminants that have been detected are generally consistent with the
chemicals used by the Navy operations, the industries established in the Hastings East Industrial
Park (HEIP) since the 1960s may have generated some of the VOCs being detected. The portion
of this investigation focusing on surface contamination on 2,600 acres of the HEIP has been
completed.
South Landfill: This landfill, southeast of the Hastings city limit, was operated by the City and
accepted industrial waste during the 1960s and 1970s. Contamination at this subsite consists
primarily of several types of VOCs.
Site Responsibility: This site is being addressed through
Federal, State, local, and potentially
responsible parties' actions.
Final Date: 06/10/86
Threats and Contaminants
Ground water and soils at the various subsites are contaminated with a wide range of
VOCs and other organic compounds. The NAD site is contaminated with heavy metals
and explosives in addition to VOCs, and the Second Street subsite also contains
PAHs. The city water supply is safe for drinking, but people and livestock may
experience adverse health effects from drinking contaminated ground water around the
subsites, which are located outside the city limits.
Cleanup Approach
Because of the size and complexity of the site, a number of long-term remedial phases are
required to address the overall control of contamination in the ground water and soil (source
control). Source control actions have been given priority. The site has been divided into
subsites which generally focus on addressing the source of contamination and the resulting
ground water contamination at each of the area subsites.
December 1994 2 HASTINGS GROUND WATER
CONTAMINATION
-------
Response Action Status
Well #3 Plume 1/Source Control: The EPA selected a remedy for the Well #3
subsite in 1989, which focuses on cleaning up the source of CC14 in the ground
water. The remedy featured soil vapor extraction whereby volatile contaminants are
"vacuumed" from the soils, and the vapors are treated with activated carbon to remove the
contaminants. The EPA and the State completed the soil cleanup at the Well #3 subsite in 1993.
Well #3 - Plume 2/Source Control: A second contamination plume, consisting
primarily of the VOCs TCA, trichloroethylene (TCE), and tetrachloroethylene
(PCE), was found in the EPA's most recent investigation in the fall of 1993. The
EPA and a party potentially responsible for site contamination have completed two soil gas
surveys to determine the sources of the plume. Investigations are expected to continue until late
1995, when the EPA anticipates selecting the appropriate cleanup remedy.
Well #3 Ground water - Plume 1 (CC14): Studies into the nature and extent of
ground water contamination at this subsite began in 1991 and were completed in
1993. Currently, the EPA and the State are designing the ground water cleanup
system to address this plume. Cleanup actions are expected to begin in 1995.
Well #3 Ground water - Plume 2: The EPA decided in 1993 to extract and treat
the second plume related to Well #3. As part of the plume 2 source control, the EPA
will determine those potentially responsible for contamination to lead the
implementation of the selected cleanup action. Design of the extraction and treatment system is
anticipated to start in early 1995.
Colorado Avenue Source Control: In 1988, the EPA selected a cleanup
approach which focuses on cleaning up 42,700 cubic yards of soil polluted with
VOCs that are associated with the contaminated sewers along Colorado Avenue. The
parties potentially responsible for the contamination at this subsite will "vacuum" volatile
chemicals from the soil without digging it up, treat the removed vapor with activated carbon, if
necessary, and monitor soil, air, and ground water at the site. Design of the cleanup action
began in 1988, based on a pilot study of the proposed cleanup technology. The cleanup actions
are expected to begin in 1995.
Colorado Avenue Ground water: The EPA completed a study into the nature
and extent of ground water contamination at this subsite in 1991. The EPA has
chosen to extract and treat the ground water in the most contaminated area of the
plume. The potentially responsible parties began predesign work and completed an aquifer/pump
test at the subsite in 1993. Treatment of the ground water is expected to begin in 1996.
Second Street: The EPA completed an investigation of the Second Street area in
1994. The EPA and the State currently are reviewing this subsite and its cleanup
needs. In the meantime, additional work to define the extent of ground water
contamination at this area is continuing. A cleanup decision is expected by 1996.
HASTINGS GROUND WATER 3 December 1994
CONTAMINATION
-------
North Landfill Ground water: The EPA began an intensive study of ground water
contamination at this subsite in 1985. Workers installed three ground water
monitoring wells at the landfill and tested wells east of the site. Data revealed
contamination by a variety of VOCs. In 1989, the parties potentially responsible for
contamination at the landfill agreed to take over this study. This effort included recommending to
the EPA the best strategies for final cleanup. In 1991, EPA selected an extraction and treatment
remedy as an interim action. The design of the interim treatment system is currently underway by
the City of Hastings and Dutton Lainson Company, under EPA monitoring, and is expected to be
completed in late 1994.
North Landfill Source Control: Studies to determine the sources of soil and
ground water contamination at the North Landfill and to determine cleanup
alternatives are complete. In 1991, a landfill cap and gas monitoring remedy was
selected as an interim cleanup measure. The design of the landfill cap is currently underway by
the City of Hastings and Dutton Lainson Company, and is scheduled for completion in late 1994.
FAR-MAR-CO Soil: The EPA selected a remedy for soil cleanup at this subsite in
1988. A fumigant spill resulted in contamination of about 33,800 cubic yards of soil,
and the ground water beneath it is also highly polluted. Features of the remedy
include soil vapor extraction, whereby volatile chemicals are "vacuumed" from the soil without
displacing it and treated with activated carbon to remove vapor, if necessary; temporarily
covering the contaminated soils to restrict contact; and monitoring soil, air, and ground water at
the site. The parties potentially responsible for site contamination completed the design of the
cleanup remedy in 1994. Cleanup actions are expected to begin soon.
FAR-MAR-CO Ground water: The potentially responsible parties are conducting
an investigation of the ground water contamination in the FAR-MAR-CO area. The
results of the investigation will be used to develop a technical approach for restricting
the flow of contaminated ground water beneath the site and to evaluate the need for ground water
treatment. The potentially responsible parties, who are conducting the investigation at mis
subsite, relocated two residents from this subsite in 1990. The investigation is expected to be
completed in 1995.
TCA Contamination Area: The party potentially responsible for the TCA
contamination removed the polluted soil and transported it to a licensed hazardous
waste disposal facility in 1989. The same party signed a Consent Order with the EPA
and completed a study of the contamination in 1990. Based on the results of this study, the EPA
recommended mat the potentially responsible party monitor the ground water for a period of two
years. This ground water testing showed no further contaminants, indicating that the removal
action effectively prevented migration of TCA to the ground water.
South Landfill: The EPA completed a soil gas investigation at the subsite in 1994.
The field investigations needed to characterize the nature and extent of contamination
at this subsite have been discussed with the City of Hastings and the other parties
potentially responsible for its contamination. The EPA has determined that further investigations
are needed to define the nature and extent of the ground water contamination. These
investigations are planned to be completed in late 1996.
December 1994 4 HASTINGS GROUND WATER
CONTAMINATION
-------
Yard Dump and Bomb and Mine Complex: As part of the NAD investigation,
the U.S. Army Corps of Engineers is currently evaluating the nature and extent of
contamination in this area. The on-going study is focusing on defining the extent of
metals, volatiles and explosives contamination. The area is located along the southern boundary
of the NAD, approximately one mile north of the town of Glenville. The study is expected to be
completed in early 1996, at which time a cleanup approach will be selected to address the
contamination.
Hastings East Industrial Park (HEIP) Surface Soils: The U.S. Army Corps of
Engineers began an intensive study of ground water contamination at this subsite in
1986. The HEIP subsite is in the former Navy Ammunition Depot. In 1988, the
Corps released the results of the first part of the study, which identified sources of ground water
contamination. The report confirmed that explosives are the major contaminants at the site, along
with PAHs, heavy metals, and VOCs. In 1990, the Corps issued a final report on this study
addressing contaminated ground water and soils. Also in 1990, a remedy was selected for the
cleanup of the surface soils. The remedy recommended that soils above a predetermined cancer
risk level be incinerated off site. Soils slightly below this risk level, as well as soils of a non-
carcinogenic nature, are to be stabilized and placed in an on-site landfill. The remedy also called
for a treatability study which was completed in 1993. Results of the treatability study and
additional information gathered during design investigations support minor amendments to the
1990 remedy. These amendments included transportation of soils requiring incineration to an
off-site facility for treatment and disposal, stabilization of the soil contaminated by metals, and
disposal of stabilized soils and soils contaminated with low level organics in an on-site landfill. In
addition, the proposed remedy is an interim action for addressing PAH contamination. The
Army Corps of Engineers continues to fully characterize PAH contamination at the site. A final
remedy specifically addressing PAHs will be selected once this further investigation is completed.
The technical design for the cleanup of soil contaminated by VOCs and heavy metals is expected
to be completed in 1995.
HEIP Ground water and Vadose Zone: A portion of this study was completed
concurrently with the study of this area's surface soils described above. As part of
this ongoing study, the Army Corps of Engineers issued a Ground water Modeling
Study in 1990. The Corps continues to modify this ground water model to address different
cleanup alternatives. Additional investigations are ongoing for both ground water and vadose
contamination. These investigations are planned to be completed in early 1996.
Site Facts: Funding provided by EPA, the State, the Department of Defense, the City of
Hastings and the potentially responsible parties is being used to cleanup the Hastings site. In
compliance with a 1988 Administrative Order on Consent (AOC), several parties potentially
responsible for site contamination demonstrated successful recovery of VOCs at the Colorado
Avenue subsite. Thereafter, the EPA issued two Unilateral Administrative Orders that require
the potentially responsible parties at the Colorado Avenue to perform the cleanup. The EPA and
the City of Hastings signed an AOC in 1989 for conducting an investigation at the Norm Landfill
subsite. The EPA, the City, and the Dutton Lainson Company signed an AOC in 1992 to
perform the technical design to implement the ground water extraction and treatment system and
the landfill cap at the North Landfill. Hastings Irrigation Pipe Company and the EPA signed an
AOC in 1989 requiring the firm to perform an investigation and remove polluted soil from the
HASTINGS GROUND WATER 5 December 1994
CONTAMINATION
-------
TCA Contamination Area. Farmland Industries and the EPA signed an AOC to conduct
treatability studies and complete the technical design for controlling the source of contamination
at the FAR-MAR-CO soil subsite. Morrison Enterprises is performing an investigation of the
ground water at the FAR-MAR-CO subsite under the terms of the AOC. The EPA and Dutton
Lainson entered into an AOC requiring Dutton Lainson to perform a soil gas investigation at their
property at the Well #3 Plume 2 subsite.
Environmental Progress
Due to the numerous cleanup actions and the number of contaminated areas and subsites at the
Hastings Ground Water site, the status of cleanup activities varies. The ground water actions will
be long-term. In general, however, the potential for exposure to hazardous substances in the
ground water has been greatly reduced by closing down contaminated wells while further studies
and cleanup activities are being planned and conducted. Further contamination of the ground
water is being prevented by the EPA and other parties' efforts to clean up the sources of
contamination. The EPA continues to monitor the quality of the ground water adjacent to the
Hastings site, informing property owners and businesses when contaminant levels exceed
acceptable limits. Discussions between the EPA, the State, the City and the potentially
responsible party group continue in an effort to apply the Superfund process to determine a final
remedy for the Hastings Ground Water site.
Site Repository
Hastings Public Library, Fourth and Denver Streets, Hastings, Nebraska 68901. In addition, the
Central Community College Library, E. U.S. Highway 6, Hastings, ME 68901 contains some
documents.
December 1994
HASTINGS GROUND WATER
CONTAMINATION
-------
<%
On
<*>
,*x%
,^V\4
Ss&ss, •>
r<5L
\
W*>
^<^ ^/V% %
-------
Response Action Status
Initial Actions: In 1984, Lindsay began operating an interim pump and treat
system, whereby the groundwater is treated by neutralizing and removing
contaminants. A second extraction well was installed in 1989 to control off-site
migration of contaminants and increase the radius of influence. Off-site monitoring wells show
that the project is controlling the migration of contaminants from the site.
Entire Site: Lindsay began a study of the nature and extent of contamination
remaining at the site, as well as the alternative technologies for cleanup. The study
was completed in 1990. Based on the results of the study, the EPA selected a remedy
that included a pilot study to evaluate the feasibility of vacuum extraction of on-site soils,
installation of such a system if it is deemed practical, enhancement and utilization of the existing
groundwater extraction and treatment systems, installation of additional groundwater monitoring
wells, and continued monitoring of the groundwater collection/treatment system during cleanup
activities. Lindsay began the technical design for these activities in 1992. In early 1993, a third
extraction well became operational to assist in pumping and treating the groundwater. The soil
vapor extraction pilot study was concluded in January 1993. Pilot results show that a full scale
system is practicable. Design of the full scale system was completer1 in mid-1994; construction
began shortly thereafter and is expected to be completed in 1996.
Site Facts: In April 1992, a Consent Decree was signed that requires the potentially
responsible parties to design the remedy and clean up the site under EPA monitoring.
Environmental Progress
The groundwater restoration project described above has reduced the potential for exposure to
hazardous materials at the Lindsay Manufacturing site while construction of the final cleanup
actions is underway.
Site Repository
Columbus Public Library, 2504 14th Street, Columbus, NE 68801
November 1994 2 LINDSAY MANUFACTURING CO.
-------
NEBRASKA AR
ORDNANCE PL
NEBRASKA
EPA ID# NE6211890011
REGION 7
Saunders County
12 mile east of Mead
Other Names:
Mead Ordnance Plant; University of
Nebraska, Mead Field Laboratory
Site Description
The 17,000-acre Nebraska Army Ordnance Plant site operated from 1942 to 1956 as a munitions
production plant for four bomb loading lines during World War n and the Korean War. In
addition, the plant was used by the Army for munitions storage and ammonium nitrate
production. The Air Force also built and maintained, three Atlas missile silos at the facility from
1959 to 1964. Some of the processes associated with these activities used organic solvents.
Beginning in 1962, portions of the plant were sold to various entities. Today, the major
production area of the former plant, approximately 9,000 acres, belongs to the University of
Nebraska, which uses it as an agricultural research station. The remaining acreage is owned by
the Nebraska National Guard and numerous individuals and corporations. Approximately 400
people obtain drinking water from wells within 3 miles of the site. Groundwater also is used for
crop irrigation and livestock watering.
Site Responsibility: This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 10/26/89
Final Date: 08/30/90
Threats and Contaminants
The groundwater is contaminated with volatile organic compounds (VOCs) and
munitions wastes. The soil also is contaminated with munitions wastes, as well as
polychlorinated biphenyls (PCBs). People who have direct contact with or ingest
contaminated groundwater or soil may be at risk.
Cleanup Approach
Several emergency cleanup actions have been taken at the site, and will continue to be taken on
an as-needed basis. Long-term cleanup of the site is being addressed hi three phases: the first
addresses soil contaminated by munitions waste; the second focuses on groundwater
contamination; and the third focuses on the remaining site contamination.
November 1994
-------
Response Action Status
Emergency Actions: In 1989, the U.S. Army determined that a private well was
contaminated. The EPA immediately responded by providing the owners with bottled
water, which later was provided by the Army. The Army since has installed a carbon
filtration system at that residence and another nearby residence. The Army removed "hot spots"
of PCB-contaminated soils from the site in 1994.
Soils: The Army began conducting an investigation in 1991 to determine the extent of
soil contamination at the site. The investigation was completed in 1993. The results
currently are being evaluated to select the appropriate technology for cleaning up the
soil. Selection of a cleanup approach is expected to take place in 1995.
Groundwater: The Army completed an investigation into the nature and extent of
groundwater contamination at the site in 1994. The results currently are being
evaluated to select the appropriate technology for cleaning up the groundwater.
Selection of a cleanup approach is expected to take place in 1996.
Site-wide: In addition to analyzing soil and groundwater contamination at the site,
the Army also is conducting investigations into other possible contamination. The
Army began these investigations in late 1994 and is expected to complete them in late
1996.
Site Facts: The Nebraska Army Ordnance Plant site is participating in the Defense
Environmental 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. An Interagency Agreement between the EPA,
State, and Army was signed in 1991 to coordinate cleanup responsibilities.
Environmental Progress
Providing bottled water, installing a carbon filtration system, and removing "hot spots" of PCB-
contaminated soil have reduced the potential of exposure to hazardous substances in the drinking
water while further investigations are underway at the Nebraska Army Ordnance Plant site.
Site Repository
Contact the Region 7 Superfund Community Relations Office.
November 1994
NEBRASKA ARMY ORDNANCE PLANT
-------
SHERWOOD
MEDICAL CO.
NEBRASKA
EPA ID# NED084626100
EPA REGION 7
Madison County
Norfolk
Site Description
The 60-acre Sherwood Medical Co. site consists of the plant property and nearby wells
contaminated with volatile organic compounds (VOCs). Since 1962, Sherwood Medical Co. has
manufactured disposable medical supplies. From 1961 until early 1967, the floor drains in the
tool room, thought to be a major source of contamination, discharged into Sherwood Lake. In
early 1967, the drains were rerouted to a concrete catch basin and men to septic system leach
fields on the west side of the plant. In early 1969, the discharge from the drain was diverted into
a 2000-gallon underground storage tank and then to the leach fields. Approximately 7 gallons of
solvent were placed in the tank each month. The tank also received larger volumes of diluted,
nonhazardous caustic waste along with the toolroom wastewater from 1969 to 1989. This
arrangement continued until 1974, when use of the leach fields was discontinued and a sewage
treatment system was installed for the plant. Discharges from the tool room continued to go into
the tank through late 1989, when the tank was removed from service. A local pumping service
periodically emptied the tank between 1974 and 1989. From 1973 to 1986, plastic injection molds
were cleaned in two plant areas that had floor drains connected to a septic system. Local wells
were sampled by the EPA and the Nebraska Department of Health from 1987 to 1989. VOCs
were detected in Sherwood Well #5, used for industrial purposes, and the main well serving the
residences of the Park Mobile Home Court (PMHC). Soil-gas surveys led site investigators to
believe mat contaminants are migrating in a north/northeast direction with groundwater flow into
PMHC's main well and backup wells. In 1989, the EPA detected VOCs in the tank and the
settling basin. Public and private wells within 4 miles of the site provide drinking water to an
estimated 5,900 people. Corn grown for livestock consumption is located on land irrigated by
wells within 3 miles of the site. The surrounding area is used for agricultural, residential, and
commercial purposes.
Site Responsibility:
The site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 07/29/91
Final Date: 10/14/92
Threats and Contaminants
At the plant facility, VOCs were present in the septic system, including the tank and
settling basin. Discharges of wastewater to the disposal pond also were found to
contain VOCs. Contamination has migrated through the groundwater and is seeping
into the water supply of a well used for industrial purposes and the main and backup
wells of PMHC.
November 1994
-------
Cleanup Approach
This site is being addressed in two stages: immediate actions and a long-term remedial phase
focusing on soil and groundwater.
Response Action Status
Immediate Actions: In 1988, the EPA supplied the residents of PMHC with
bottled water. Later, a carbon treatment system was installed to treat the PMHC
drinking water and the EPA discontinued supplying water to the residences. In 1989,
PMHC was connected to an uncontaminated well. Other immediate actions taken included
cleaning the septic tank and settling basin, taking them out of service, and rerouting floor drains
to the plant's sewage treatment system.
Entire Site: Under the supervision of the EPA, Sherwood conducted an investigation
at the site to determine the extent and nature of contamination and to identify
alternative technologies for cleanup. Sherwood completed the study in 1993 and the
EPA selected a remedy that includes excavation and low temperature thermal treatment of
contaminated soils in two source locations, groundwater monitoring, provision of drinking water
to PMHC and to affected and nearby industrial properties, and removal of the septic and
underground storage tank systems. The design of the cleanup remedies are scheduled to begin
soon.
Site Facts: An Administrative Order on Consent between the EPA and Sherwood Medical Co.
was signed in August 1989, requiring the company to perform immediate cleanup actions. An
Administrative Order on Consent for the potentially responsible party to investigate site
contamination went into effect in March 1991.
Environmental Progress
Immediate actions such as supplying bottled water and installing a carbon treatment system have
reduced health and safety risks to the nearby population while Sherwood Medical Co. plans
activities for final cleanup of the site.
Site Repository
Not established.
November 1994 2 SHERWOOD MEDICAL CO.
-------
WAVERLY
GROUND W
CONTAMINATION
NEBRASKA
EPA ID# NED980862718
Site Description
EPA REGION 7
Lancaster County
Waverly
Other Names:
CCC Commodity Credit Corporation
Hedrick Site
The Waverly Ground Water Contamination site extends over an 11-acre area underlying the City
of Waverly. The U.S. Department of Agriculture operated a Federal grain facility in Waverly
from 1952 to 1974. A grain fumigant consisting of carbon tetrachloride and carbon disulfide was
used at the facility from 1955 to 1965. Since 1975, the property has been owned by Lancaster
County, which operates a district office and maintenance facility on the premises. The EPA and
the State of Nebraska sampled the municipal wells in 1982 and found them to be contaminated.
One well was taken out of service, two wells were placed on standby status, and the city drilled
new wells to replace them. The area surrounding the site is predominantly agricultural. The
population of Waverly is approximately 1,700 people. There is a residential area adjacent to the
former grain facility. Several private wells near the site are used for livestock and crop irrigation.
Runoff from the site drains into Salt Creek.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 10/15/84
Final Date: 06/10/86
Threats and Contaminants
Samples taken from the municipal wells contained concentrations of heavy metals,
volatile organic compounds (VOCs), nitrates, and sulfates. The soil is contaminated
with VOCs including carbon tetrachloride and chloroform. Contaminants from the soil
have seeped into the aquifer, the source of water for the municipal water supply. The
polluted wells were taken out of service, and new wells were drilled; therefore, the
municipal water supply is safe to use. The new wells are upgradient of the site and are
not likely to be threatened. If contaminated water is used for irrigation or for watering
livestock, pollutants may accumulate in the crops or animals which, if eaten, may
pose a health threat to people. Because ground water discharges into Salt Creek, fish
in the creek may be contaminated and cause adverse health effects in people who eat
them.
November 1994
-------
Cleanup Approach
Response Action Status
Immediate Actions: In 1988, as an immediate response to the ground water
contamination, the EPA installed ground water monitoring wells, a system of pipes
and wells in the ground connected to a pump to remove vapors contaminating soil
(soil gas extraction system), and a ground water treatment system using air stripping. The ground
water treatment involves forcing a stream of air through the contaminated water to evaporate the
chemicals, which then are released into the atmosphere. Air monitoring is conducted to ensure
that emissions are within acceptable limits. Treated ground water is discharged to a ditch near the
site. The U.S. Department of Agriculture (USDA) is performing the operation and maintenance
on the ground water extraction and soil gas treatment system. An additional extraction well was
added to the system in 1994 to address contamination discovered outside the influence of the
current ground water extraction well.
Entire Site: The USDA completed an investigation into the nature and extent of
contamination at the site. Based on the results of this investigation, the EPA
recommended that the immediate actions described above be continued until cleanup
of soil and ground water is achieved. Operation and maintenance of the ground water treatment
system is expected to continue for 6 years.
Environmental Progress
Construction at the site is complete. With the ground water cleanup actions described above
underway and new wells providing drinking water to residences, the potential for accidental
contact with contaminated ground water or soil has been reduced while operation of the ground
water treatment system continues.
Site Repository
Contact the Region 7 Superfund Community Relations Office.
November 1994 2 WAVERLY GROUND WATER
CONTAMINATION
------- |