&EPA
United States
Environmental Protection"
Agency
Solid Waste And
Emergency Response
(5201 G)
SUPERFUND:
EPA/540/R-95/083
PB95-962915
9200.5-713C
May 1995
Progress at
National
Priority
List Sites
IDAHO
1995 UP DATE
Printed on Recycled Paper
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How to Use the NPL Book
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i
j
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, madt 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:
: xxxxxxxxxxxx xxxxxx xxxxxxxxx xxxxxxxx xxxxxxxxxxxxx
: xxxxxxxxxx xxxx xxxxxxxx xxxx xx xxxxxxxxx xx xxxxxx xxxxxxxx \
xxxxxxxxxfcw^utxxx xxx xxxxxxxxxxxxx xx xxxxxx xxxx xxxxx xxxx X xxx xx
xxxxxxx xxx xxxSOftfc^xxxxx xxxxx xxxxxx xxxxxxxx xxxxxxxx xxxx xxxxxxxxxx :
xxxxxxxxxxxx xxxxxxxxx^Wwytx xxx xx xxxxxxxxx xxxxx xxxx xxxx xxxxx xxxxxxx xxxxxxxx
xxxxxxxx xxxxxxxxx xxxx xxxxJBBiitxxxxx xxxxxxxx xxxxx xxxx xxxxx xxx xxx xxxxxx
LXXXXXXXX XX XXXXXXX XXX XXXXX XJOOW^JCXX XXXXXX XX XXXX XXX XXXXX XXX XXXXX XXX XXXXX
Site Responsibility:
Threats and Contaminants
NPL Listing History
Proposed: XX/XX/XX
Final XX/XX/XX
XXXXXX XXX XXXXX XXXXXXXXXXXX XXXXXX XXXXXXXXX XXXXXXXX
XXXXXXXXX XXXXXXXXXXXXX XXXXXXXXXX XXXX XXXXXXXX XXXX XX
XXXXXXXX XXX XXXXXXXXXXXX XXXXX XXX XXXXXXXXXXXXX XX XXXXXX XXXX
XXX XXXXXXXXXX XXXXXXXX XXXXXXX XXX XXXXXX XXXXXX XXXXX XXXXXX
txxx xxxxxxxxxx xxxxxxxx xxxxxxxxxxxx xxxxxxxxx xxxx x xxx xx
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 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
xxx xxxxxx
^S^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 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.
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EPA ID
Number
IDD000800961
IDD980725832
IDD048340921
IDD984666610
ID4890008952
IDD041310707
IDD081830994
ID3572124557
IDD098812878
IDD984666024
IDD055030852
Site Name
ARRCOM (DREXLER ENTERPRISES)
BLACKBIRD MINE
BUNKER HILL MINING & METALLURGICAL
EASTERN MICHAUD FLATS CONTAMINATION
IDAHO NATIONAL ENGINEERING LAB (USDOE)
KERR-MCGEE CHEMICAL CORP. (SODA SPRINGS)
MONSANTO CHEMICAL CO. (SODA SPRINGS)
MOUNTAIN HOME AIR FORCE BASE
PACIFIC HIDE & FUR RECYCLING CO.
TRIUMPH MINE TAILINGS PILES
UNION PACIFIC RAILROAD CO.
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ARRCOM (DREXL
ENTERPRISES)
IDAHO
EPA ID# IDD000800961
EPA REGION 10
Kootenai County
3 mlbs Southwest of Rathdrum
Site Description
The ARRCOM (Drexler Enterprises) site covers over 1 acre, approximately 3 miles southwest of
Rathdrum. From 1960 until the facility was abandoned in 1982, ARRCOM recycled waste oils
containing a variety of organic solvents, lead, and polychorinated biphenyls (PCBs). Activities at
the site, such as abandoning storage tanks and trucks and producing hazardous waste materials,
resulted in the contamination of soils and sludges. Approximately 6,300 people live within 3
miles of the site. The residents in the area depend on groundwater for drinking water as well as
for the irrigation of fields. The nearest well is 150 feet away from the site. The Spokane Valley-
Rathdrum Prairie Aquifer runs approximately 135 feet underneath the site and is the sole source
of drinking water and crop irrigation for 350,000 people in the region. Three groundwater
monitoring wells surround the site.
Site Responsibility: This site was addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
Deleted Date: 12/23/92
Threats and Contaminants
Soils on the site contained volatile organic compounds (VOCs) including toluene,
xylene, and methyl ethyl ketone; heavy metals including lead and mercury; acid;
PCBs; and pentachlorophenol (PCP). Buildings on the site were constructed using
asbestos materials; however, these buildings have been removed. Accidental ingestion
or inhalation of contaminated soil particles or asbestos posed a potential health risk
prior to cleanup. No contamination was found in the groundwater.
January 1995
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Cleanup Approach
Response Action Status
Immediate Actions: In 1983, the EPA began removing and treating contaminants
at the site. Tanks containing PCB-contaminated products were pumped and flushed.
The volume of contents in the remaining tanks was approximately 32,000 gallons.
Approximately 10,700 gallons of oil and water mixture were recycled, 1,140 pounds of PCB
flushings were incinerated off site, and 134 cubic yards of contaminated soil were disposed of in
an EPA-approved landfill. In 1987, the EPA removed and segregated all of the hazards. A
containment tent was constructed for asbestos removal in the boiler room. A mobile laboratory
was set up, and monitoring and instrument surveying were conducted throughout the site.
Samples were taken of soil and asbestos. The EPA cleaned, disassembled, and disposed of the
tanks and trucks. Approximately 2,000 cubic yards of contaminated soils were removed. All
buildings and vehicles have been removed. In 1990, the EPA removed approximately 1,500 cubic
yards of soil contaminated with lead and PCBs. Post-removal soil sampling was conducted, and
the site was backfilled with clean fill and regraded.
Entire Site: In 1991, the EPA studied the site to ensure that all site risks had been
addressed by the initial cleanup actions. An evaluation of the soil was performed in
1991. Additional soil and groundwater samples were taken in late 1991 and early
1992. In mid-1992, the EPA determined that no further actions were required at the site. In
October 1992, the EPA issued a report to the public stating their intent to delete the site from the
NPL. The site was deleted from the NPL in late 1992.
Environmental Progress
Contaminated containers, structures, and soils have been removed from the ARRCOM (Drexler
Enterprises) site, thereby eliminating the threat of exposure to hazardous materials at the site.
The EPA determined that no further actions were needed and deleted the site from the NPL in
late 1992.
Site Repository
Rathdrum Branch Library, 731 South First Street, Rathdrum, ID 83858
January 1995 2 ARRCOM (DREXLER ENTERPRISES)
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BLACKBIRD
MINE
IDAHO
EPA ID# IDD980725832
EPA REGION 10
Lemhi County
Town of Lemhi, 21 miles east of
Salmon
Site Description
The Blackbird Mine site encompasses about 830 acres of private patented mining claims and
10,000 acres of unpatented claims within the Salmon National Forest. The site is located 21
miles east of Salmon, Idaho and is in the Panther Creek drainage basin, which is part of the
Salmon River. Big Deer Creek and Blackbird Creek drain into Panther Creek. Since the late
1800s, a variety of companies have mined cobalt and copper on the site by both shaft and
open-pit methods. The current owner, the Noranda Mining Company, ceased operations in 1982.
Mining tunnels, waste rock piles, tailing piles, and the open pit are located at the headwaters of
Meadow and Bucktail Creeks which drain into Big Deer and Blackbird Creeks. The waste piles
alone range in size from several hundred to two million cubic yards. Investigations have shown
that acid drainage and leachate from the tunnels, waste piles and tailings have contributed to the
poor water quality in local creeks. High levels of heavy metals such as copper, cobalt, arsenic
and nickel are present in surface water and sediments downstream from the site. The copper
levels exceeded the EPA's Fresh Water Ambient Water Quality Criteria. The Snake River
Sockeye spring/summer Chinook Salmon, a threatened species, inhabits the area and are
threatened by the poor water quality.
Site Responsibility:
The site is being addressed through
Federal, State, and potentially responsible
parries' actions.
NPL LISTING HISTORY
Proposed Date: 05/10/93
Threats and Contaminants
Surface water and sediments are contaminated with high levels of heavy metals such as
arsenic, copper, cobalt, and nickel. Site studies have shown that acid mine drainage
from tunnels and waste piles have contributed to the poor water quality of local creeks.
This water quality affects local aquatic life, including the Snake River spring/summer
Chinook Salmon, a threatened species. People who touch or ingest contaminated
surface water or sediments could be at risk.
January 1995
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Cleanup Approach
This site is being addressed in two stages: early actions and a long-term remedial phase focusing
on the cleanup of the entire site.
Response Action Status
Early Actions: In 1993, an early action was taken to stabilize the West Fork
Tailings Dam. The West Fork Creek was diverted to prevent further migration of
the tailings.
Entire Site: In late 1994, the potentially responsible parties, under an Administrative
Order, began an investigation to determine the nature and extent of site contamination.
The investigation, which will lead to the selection of cleanup remedies, is scheduled
to be completed in 1997.
Site Facts: In 1983, the Idaho Attorney General filed a natural resources damage suit against
current and two previous site owners/operators for alleged damages to State surface water and
groundwater. The suit is still pending.
Environmental Progress
The diversion channel has made the Blackbird Mine site safer while site studies are being
conducted.
12]
Site Repository
Not yet established.
January 1995 2 BLACKBIRD MINE
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BUNKER HILL
MINING &
METALLURGY
IDAHO
EPA IDS IDD048340921
EPA REGION 10
Shoshone County
Kellogg
Other Names:
rthern Idaho Phosphate Company
Site Description
The Bunker Hill Mining and Metallurgical Complex covers 21 square miles and encompasses the
communities of Pinehurst, Page, Smelterville, Kellogg, and Wardner. The facility includes the
Bunker Hill mine, a mill and concentrator, a lead smelter, an electrolytic zinc plant, a phosphoric
acid and fertilizer plant, a cadmium plant, and sulfuric acid plants. Mining operations began in
1889, with lead smelting starting in 1917. During the majority of the time the smelters were
operating, few environmental protection procedures or controls were used. As a result, there is
widespread contamination of soil, water, and air from lead and other heavy metals. Prior to
1938, all liquid and solid residues of mine tailings from the complex were discharged directly
into the Coeur d'Alene River and its tributaries. Thereafter, waste streams were directed to a
large outwash plain located west of Kellogg and just north of the Bunker Hill complex. Lead
smelter slag was deposited in a pile on the western end of this plain. On the eastern end of the
plain, a central impoundment area was developed and was surrounded by a 70-foot high dike of
mine tailings and waste rock. All liquid wastes, including mine pump effluent, were directed to
the pond for settling and then discharged to the river. In the early 1970s, a central treatment
plant was constructed on the edge of the pond to treat water before discharging it to the river;
however, a considerable amount of seepage is lost to groundwater through the unsealed bottom of
the pond. In 1973, public concern arose over the effects of chronic air pollution associated with
Bunker Hill operations after a fire occurred in the baghouse of the smelter. Smokestack and other
emissions from the smelting operations and acidic water discharged from mines in the area have
contaminated the hillsides and other areas surrounding the complex, destroying large areas of
vegetation. In the 1970s, the smelter owners began a revegetation program; however, large areas
still remain unvegetated. All operations are inactive, and two recent owners of the Bunker Hill
facility have filed for bankruptcy. The population of Shoshone County is approximately 13,900.
The City of Kellogg, the largest community in the county, with a population of approximately
2,600, is about a mile from the former Bunker Hill Complex. Most residences in the area use
municipal water supplies obtained from surface water. However, there may be some private wells
in the area.
Site Responsibility:
This site is being addressed through
Federal, State, and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 12/30/82
Final Date: 09/08/83
January 1 995
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Threats and Contaminants
Groundwater, sediments, soils, and surface water contain heavy metals including lead,
cadmium, and zinc. People may be exposed to health risks by coming in direct contact
with, accidentally ingesting, or inhaling contaminated groundwater, soil, surface
water, or sediments. In 1982, a significant number of Kokanee trout returned to the
South Fork of the Coeur d'Alene River, which had been totally devoid of fish below
Kellogg for many years. Improved conditions can be attributed to the installation of
the treatment facilities for wastes that once were discharged untreated into the river.
Because of elevated levels of lead in the blood of children around Kellogg, airborne
lead was a cause for alarm in the early 1970s. Closure of the smelter complex and
dust control have reduced blood lead levels, especially in children.
Cleanup Approach
The site is being addressed in three stages: early actions and two long-term remedial phases
focusing on cleanup of the residential soils and the non-populated areas.
Response Action Status
Early Actions: In 1986, the EPA removed approximately 8,750 cubic yards of
contaminated soils from sixteen public areas, such as parks and playgrounds, and
stored it on site. About 7,150 cubic yards of backfill, 13,500 square feet of sod, and
1,132 tons of asphalt pavement were used in the renovation operations. The EPA stored all
excavated contaminated soil in a temporary on-site storage facility. The waste soils were placed
within a polyvinyl chloride envelope and were surrounded with a containment dike to minimize
surface runoff. This initial action was completed with the installation of a security fence around
the temporary storage facility.
Residential Soils: In 1989, the EPA developed a residential soil removal program.
Yards chosen for the program were households where children or expectant mothers
resided and contained soil lead levels of 1,000 parts per million or greater. Since
beginning the yard removal program in 1989, 440 yards with soil lead levels greater than 1,000
parts per million have been cleaned up. In late 1991, a remedy was selected for residential soils
calling for the eventual cleanup of all yards with soil lead levels greater than 1,000 parts per
million. Design and construction have begun. A pilot program was completed to determine if
furniture and carpets can be cleaned of contaminated dust. This investigation was completed in
1991. The study recommends continued interior cleaning of house dust by residents, while
exterior sources of contamination are controlled by the EPA and the State. The need for interior
cleanup will be re-examined once exterior sources of contamination have been controlled.
January 1995 2 BUNKER HILL MINING & METALLURGICAL
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Non-Populated Areas: In 1989, Gulf Resources began initial actions in the non-
populated areas, under EPA oversight. Several thousand feet of fence were installed
around the smelter, a copper dross flue dust pile was relocated and contained in the
smelter complex, and a substantial amount of deteriorating asbestos was removed. Gulf signed an
Administrative Order on Consent in 1990 to perform hillside stabilization and restoration
activities such as tree planting, grass planting, and terrace construction. Since work began in
1991, Gulf has planted over 1 million trees and built over 55 miles of terraces. In late 1991,
Bunker Limited Partnership began removal of polychlorinated biphenyl (PCB) transformers and
treatment of acid-mercury sludges. Other waste materials also were stabilized. In 1992, a remedy
was selected for the non-populated areas which calls for extensive structural cleanup and
demolition, contamination stabilization, site surface and groundwater cleanup, and continued
erosion control by hillside restoration. Design of this remedy began in early 1993.
Site Facts: In 1987, the EPA and Gulf Resources signed an Administrative Order, under which
the company agreed to conduct an investigation of the site. In 1989, Gulf Resources and Bunker
Limited Partnership were ordered to initiate immediate cleanup actions. In 1991, a second
Unilateral Order was issued requiring Bunker Limited Partnership to perform initial actions in the
non-populated areas. In 1994, the EPA and several potentially responsible parties entered into a
Consent Decree for the cleanup of the populated areas of the site.
Environmental Progress
The EPA and the potentially responsible parties have conducted many cleanup efforts at the
Bunker Hill site. Among these actions which have helped to reduce the potential for exposure to
contaminants are: removal and storage of contaminated soil from residential properties and public
areas and placement in a secure containment facility on the site; construction of a security fence
around this area; treatment and restoration of 440 yards of the affected homes and two apartment
complexes homes in the area; site dust control; and the continued household dust abatement pilot
program. The removal of wastes from the non-populated areas is keeping this area safe while
further cleanup remedies are being designed.
Site Repository
Kellogg Public Library, 16 West Market Avenue, Kellogg, ID 83837
Pinehurst/Kingston Public Library, 107 Main Avenue, Pinehurst, ID 83850
BUNKER HILL MINING & METALLURGICAL
January 1995
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EASTERN MICH
FLATS
CONTAMINATIO
IDAHO
EPA ID# IDD984666610
EPA REGION 10
Power and Bannock Counties
Near Pocatello
Other Names:
FMC Corporation
J.R. Simplot
Site Description
The Eastern Michaud Flats Contamination site covers 2,530 acres near Pocatello. Within the site
boundaries are two adjacent phosphate processing facilities, the FMC Corporation and the J.R.
Simplot Company. The FMC Corporation has operated a phosphate processing plant, producing
approximately 250 million pounds of elemental phosphorus per year from two million tons of
shale, silica, and coke. The wastes generated from this process contain heavy metals. Waste slag
has in the past been used as highway construction materials or has been deposited on two large
on-site waste piles. The ferrous-phosphate residuals are crushed, stored on bare ground, and later
sold for their vanadium, iron, and chromium content. The precipitator dust slurry and cooling
and process water are pumped to 18 waste ponds; one of these is unlined. The J.R. Simplot
facility is located adjacent to the FMC facility. Since 1944, J.R. Simplot has produced
concentrated phosphoric acid, triple super phosphate, ammonium phosphate, and diamonium
phosphate from phosphate-containing ore. Ground phosphate rock is digested with sulfuric acid to
produce phosphoric acid and calcium sulfate (gypsum). Gypsum is pumped as a thick slurry to a
stack, which presently contains approximately 28 million cubic yards of waste. A former gypsum
stack was abandoned in 1966. The J.R. Simplot facility currently uses a wastewater treatment
system consisting of three lined ponds and two unlined ponds to collect and treat all wastewater
not recycled. In 1976, a drinking water well downhill from the FMC facility was condemned by
the State due to elevated arsenic levels. Contaminants have been found in the upper unconfined
aquifer. Approximately 55,000 people use drinking water from public and private wells within 3
miles of the site. Groundwater also is used to irrigate about 2,000 acres of forage crops within 3
miles of the site. The Michaud Flats are on the Snake River Plain and are bordered by the
American Falls Reservoir, the Portneuf River, Rock Creek, and on the south by the foothills of
the Deep Creek Mountains and Bannock Range. The Portneuf River, which is 1/4 mile from the
site, is used for fishing, recreation, and irrigation downstream from the site.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 05/05/89
Final Date: 08/30/90
January 1 995
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Threats and Contaminants
On-site shallow groundwater and off-site springs have been impacted by releases from
unlined waste management facilities at both FMC and Simplot. The primary
contaminants include arsenic, chloride, fluoride, nitrate, selenium, sodium and sulfate.
Drinking or coming into direct contact with the contaminated groundwater may pose a
health threat. Off-site soils contain elevated levels of fluoride, total phosphorus, zinc,
and cadmium to the north/northwest of the facility as a result of airborne releases
from plant processes, roads, storage areas, and wastewater ponds. Direct contact with
soil and inhalation of airborne contaminants may pose a health threat. Some of the
on-site soils contain elevated levels cadmium, chromium, copper, lead, nickel, silver,
vanadium, zinc, and fluoride. These soils are a potential source of contamination to
groundwater and a potential health threat from direct contact.
Cleanup Approach
The site is being addressed in a long-term remedial phase directed at cleanup of the entire site.
Response Action Status
Initial Actions: In late 1993, FMC began closure of pond 8S to eliminate further
releases from the pond.
Entire Site: In 1991, a study was initiated to determine the nature and extent of
contamination at the site. Based on the results of the study, the most appropriate
remedies will be recommended for site cleanup. A decision on final cleanup methods
is scheduled for 1996.
Site Facts: FMC Corporation and J.R. Simplot are investigating the site under an
Administrative Order on Consent.
Environmental Progress
While investigations leading to the selection of a final remedy for the site contamination are being
conducted, FMC Corporation has begun closure of pond 8S. The EPA performed preliminary
investigations and determined that no other immediate actions are required to protect area
residents from site contamination.
January 1995 2 EASTERN MICHAUD FLATS CONTAMINATION
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Site Repository
Idaho State University Library, Document Department, P.O. Box 8089, Pocatello, Idaho 83209
Shoshone-Bannock Tribe Library, Ft. Hall Indian Reservation, Human Development Resource
Center, Ft. Hall, Idaho 83202
EASTERN MICHAUD FLATS CONTAMINATION
January 1995
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IDAHO NATIO
ENGINEERING
LABORATORY
IDAHO
EPA ID# ID4890008952
EPA REGION 10
Butte County
Near Idaho Falls
Other Names:
Idaho Operations Office
Site Description
The Idaho National Engineering Laboratory (INEL) site, now owned by the U.S. Department of
Energy (DOE), covers 890 square miles in southeastern Idaho, near Idaho Falls. The Atomic
Energy Commission set up the National Reactor Testing Station on the grounds in 1949 to build,
test, and operate various nuclear reactors, fuel processing plants, and support facilities. Earlier,
parts of the site were used by the Department of Defense (DOD). In 1974, the facility assumed
its present name to reflect the broad scope of engineering activities it conducts. INEL consists of
a number of major facilities, which contribute contaminants to the Snake River Plain Aquifer and
draw water from the Snake River Plain Aquifer. Approximately 17,300 tons of hazardous
materials were deposited at one area through an injection well extending 100 feet into the Snake
River Plain Aquifer and also into numerous unlined ponds and an earthen ditch. Waste materials
disposed of in this area included chromium-contaminated cooling tower blow down water, waste
solvents, sulfuric acid, radionuclides, and laboratory wastes. The Snake River Plain Aquifer is
the source of all water used at the INEL and is an important water resource in southeastern
Idaho. Although the three adjacent facilities at the INEL are several miles apart, they are being
considered together for this site cleanup due to the extent of chromium contamination. Over
3,000 people draw water from wells within a 3-mile radius of the site. The facility employs
approximately 10,500 people. The nearest large population center is Idaho Falls, which is located
approximately 30 miles to the east of the site.
Site Responsibility:
This site is being addressed through
Federal actions.
IMPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 11/21/89
January 1995
-------
Threats and Contaminants
Hexavalent chromium has been detected in monitoring and drinking water wells in the
Snake River Plain Aquifer at the Test Reactor and Central Facilities Area at the
INEL. Acetone, sodium hydroxide, sulfuric acid, and volatile organic compounds
(VOCs) were detected to a lesser degree. Tests conducted in 1987 by INEL and the
U.S. Geological Survey at the Radioactive Waste Management complex on the site
indicate that carbon tetrachloride and trichloroethylene (TCE) have migrated from
where they were buried to the Snake River Plain Aquifer. Soils are contaminated with
heavy metals such as lead and mercury, VOCs, and radionuclides. Potential health
risks may exist from ingesting or coming in direct contact with the contaminated
groundwater and soil.
Cleanup Approach
This site is being addressed by interim actions and eight long-term remedial phases focusing on
the Test Area North of the INEL, the Test Reactor Area, the Central Facilities Area, the Power
Burst Facility/Auxiliary Reactor Area, the Radioactive Waste Management Complex, the Naval
Reactors Facility, the Idaho Chemical Processing Plant, and remaining site areas.
Response Action Status
Interim Actions: An interim cleanup action was undertaken in the fall of 1993 to
locate, detonate, and dispose of unexploded munitions and associated shrapnel; and to
characterize, remove, and incinerate soils contaminated with explosive residues at six
specific areas at the INEL. During the course of this action, approximately 185 cubic yards of
contaminated soils were taken off site for incineration.
Test Area North of INEL: An interim remedy was selected in the fall of 1992 to
address treatment of the groundwater in the vicinity of the injection well at the
Technical Support Facility. Operation of the water treatment system began in early
1994.
Test Reactor Area: The Test Reactor Area (TRA) houses extensive facilities for
studying the effects of radiation on materials, fuels, and equipment. A study of
perched water beneath the TRA facility led to a decision to take no further action in
late 1992. This area will continue to be monitored. An interim remedy for the Warm Waste Pond
area, which involved waste consolidation, was completed in early 1994. This remedy was
implemented after treatability testing revealed that chemical/physical contaminant separation was
not effective due to site conditions. Further studies to determine the comprehensive nature and
extent of contamination at the Test Reactor Area will continue until late 1998.
January 1995 2 IDAHO NATIONAL ENGINEERING LABORATORY
(USDOE)
-------
Central Facilities Area: The DOE began an investigation into the nature and extent
of contamination at the motor pool pond of the Central Facilities Area in late 1991. In
late 1992, it was determined that no cleanup action was necessary in this area. Other
studies of the Central Facilities Area began in early 1993, with the primary focus being
investigation of the nature and extent of contamination of the three landfills.
Power Burst/Auxiliary Reactor Area: In late 1991, the DOE began studies of the
contamination at the Power Burst Facility evaporation pond and the Auxiliary Reactor
Area chemical pond. Additional studies of this sub-site will focus on tanks and
components of wastewater disposal facilities and are scheduled to begin in early 1997.
Radioactive Waste Management Complex: The primary focus of the studies
of the Radioactive Waste Management complex is the Subsurface Disposal Area
(SDA). It includes numerous pits, trenches, and vaults where radioactive and
organic wastes were stored, as well as a large pad (Pad A) where waste was placed above grade
and covered. In late 1991, DOE began studies of the contamination at the Radioactive Waste
Management Complex Pad A, Pit 9, and shallow groundwater. An interim action was selected in
the fall of 1993 which entails excavation and treatment of radioactive wastes in Pit 9. The Pit 9
project is currently under design. The Pad A remedy, selected in early 1994, is continued cover
maintenance of the pad. Selection of the cleanup remedy for organic contamination in the "vadose
zone" is expected in 1995. Studies for the remaining pits and trenches in the SDA are ongoing
and are expected to be completed in 1996.
Naval Reactors Facility: Areas of concern at the Naval Reactors Facility include
landfills, old spills, wastewater disposal systems, and storage areas. Studies have
been completed at the Industrial Waste Ditch at the Naval Reactor Facility. In the fall
of 1994, it was determined that no cleanup action was required at the ditch. In 1993 and 1994,
several landfill areas were evaluated. In the fall of 1994, a remedy was selected calling for a soil
cover for the landfills and soil gas and groundwater monitoring. It is anticipated that the remedy
for these areas will be completed by the fall of 1995.
Idaho Chemical Processing Plant: In early 1994, DOE initiated studies
evaluating the contaminated perched water under the Chemical Processing Plant.
These studies are anticipated to continue through 1995.
Remaining Areas: Additional studies are scheduled to begin at the Idaho Chemical
Processing Plant, Experimental Breeder Reactor, Argonne National Laboratory, and
Snake River Plain Aquifer sub-sites starting in 1996. These studies will be used to
determine alternatives for cleanup of these parts of the Idaho National Engineering Laboratory
site.
Site Facts: In July 1987, the EPA and INEL signed a Consent Order calling for site
investigation and cleanup. An Interagency Agreement for cleanup of the entire site was signed in
December 1991. This agreement supersedes the previous Consent Order.
IDAHO NATIONAL ENGINEERING LABORATORY 3 January 1995
(USDOE)
-------
Environmental Progress
Cleanup activities at the Idaho National Engineering Laboratory site include groundwater
treatment, contaminated soil removal, and munitions disposal. Further studies are ongoing to
determine cleanup remedies for the remainder of the site.
Site Repository
INEL Technical Library, 1776 Science Center Drive, Idaho Falls, ID 83415
January 1 995
IDAHO NATIONAL ENGINEERING LABORATORY
(USDOE)
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KERR-MCGEE
CHEMICAL C
(SODA SPRIN
PLANT)
IDAHO
EPA ID# IDD041310707
EPA REGION 10
Caribou County
1 mile north of Soda Springs
Other Names:
Soda Springs Plant
Site Description
The Kerr-McGee Chemical Corporation (Soda Springs Plant) site covers 158 acres and is located
a mile north of Soda Springs. The site is in a broad, flat valley near the western base of the
Aspen Range. Since 1963, the plant has generated a number of liquid wastes and stored them in
on-site ponds. The Monsanto Chemical Company, another large industrial complex nearby that
also is on the NPL, supplies Kerr-McGee with the by-product ferrous-phosphate solids that are
processed into vanadium pentoxide. The two largest on-site ponds hold over 12,000 cubic yards
of waste. The hazardous chemicals found in these ponds are vanadium, arsenic, copper, and
silver. Groundwater beneath the site has been affected by chemicals leaking from the holding
ponds. Approximately 23 people live within a mile of the site, and about 3,000 people live within
3 miles of the site. Public springs and private wells that provide drinking water to over 3,000
people and a private well that irrigates 165 acres are located within 3 miles of the site; however,
investigations have shown that Soda Springs drinking water supplies are not affected by releases
from the site. Significant agricultural crops in the area include wheat and hay.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 05/05/89
Final Date: 10/04/89
Threats and Contaminants
On-site monitoring wells and ponds contain vanadium, arsenic, copper, and silver.
Potential health risks may exist from drinking contaminated groundwater or coming
into direct contact with or inhalation of blowing dust. The topography in the area
prevents the migration of contaminants to surface water off the site.
January 1 995
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Cleanup Approach
The site is being addressed in a long-term remedial phase focusing on cleanup of the entire site.
Response Action Status
n^T I Entire Site: An investigation to determine the nature and extent of contamination at
^•>. the site began in 1990. Five rounds of on-site and off-site sampling have occurred to
-** date. Samples have been taken of groundwater, surface water, soil, and source
material. The EPA conducted a human health and ecological risk assessment which determined
that potential exposure to contaminated groundwater was the only significant risk associated with
the site. Once the investigations are completed, planned for late 1995, the EPA will select a
remedy for the site.
Site Facts: In September 1990, an Administrative Order on Consent was signed by the EPA
and Kerr-McGee. Under this order, Kerr-McGee agreed to conduct the site studies.
Environmental Progress
After listing the Kerr-McGee site on the NPL, the EPA determined, based on preliminary
evaluations, that no immediate cleanup actions were required while the extensive investigation
leading to the selection of the final cleanup remedies for the site is taking place.
Site Repository
Soda Springs Public Library, 149 South Main, Soda Springs, ID 83267
January 1995
KERR-MCGEE CHEMICAL CORP.
(SODA SPRINGS PLANT)
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MONSANTO
CHEMICAL C
(SODA SPRI
PLANT)
IDAHO
EPA ID# IDD081830994
Site Description
EPA REGION 10
Caribou County
North of Soda Springs
The Monsanto Chemical Company (Soda Springs Plant) encompasses 530 acres and processes
locally mined phosphate ore to produce elemental phosphorus. The facility consists of over a
dozen administrative and processing buildings plus ore piles, slag piles, by-product materials,
surface impoundments and a waste landfill. The site was purchased by Monsanto in 1952.
Approximately one million tons of phosphate ore are processed through the plant each year. Ore
is stockpiled on site prior to being processed for introduction into electric arc furnaces along with
coke and silica. All process waters, with the exception of non-contact cooling water, are held and
treated on site and then reused. The non-contact cooling water is discharged from the site to Soda
Creek, which is used in agricultural irrigation. The process wastes, previously stored in unlined
ponds or impoundments, have been pinpointed as sources of contamination to the local
groundwater. Other potential sources of pollution include waste slag, windborne dust emissions,
and air emissions from ore processing and the electric arc furnaces. Land use in the vicinity of
the Monsanto facility is primarily industrial and agricultural. The plant is staffed with about 400
employees, and 3,100 residents live within 3 miles of the site. Most of the residents' water is
supplied by the Town of Soda Springs from springs located north of the plant. The closest
surface water is Soda Creek, located approximately 2,000 feet west of the facility. Many of the
nearby residents depend on domestic wells, but most of these wells are upgradient of the site.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 05/05/89
Final Date: 08/30/90
Threats and Contaminants
Groundwater underlying the site and the surrounding vicinity is contaminated with
cadmium, selenium, vanadium, and fluoride. A health threat may exist for individuals
who use or come into direct contact with contaminated groundwater. Studies to date
have confirmed that Soda Springs drinking water supplies are uncontaminated and
have not been affected in any way by the Monsanto site.
January 1995
-------
Cleanup Approach
The site is being addressed in two stages: initial actions and a long-term remedial phase directed
at cleanup of the entire site.
Response Action Status
Initial Actions: All currently active process wastewater impoundments have been
lined. Soil from the old ponds, which is a source of ground water contamination, has
been removed and backfilled with clean cover material. A network of approximately
52 monitoring wells is maintained to assess plume migration.
Entire Site: An investigation into the type and extent of contamination began in
1991. The EPA has completed the baseline risk assessments and provided them to
Monsanto, which is proceeding to complete the investigation. At the conclusion of the
investigation, scheduled for late 1995, selection of the final cleanup remedies will be made.
Environmental Progress
The lining of the wastewater impoundments and removal of the source of groundwater
contamination has made the site safer while investigations leading to the selection of final cleanup
remedies are taking place.
Site Repository
Soda Springs Public Library, 149 South Main, Soda Springs, ID 83276
January 1 995
MONSANTO CHEMICAL CO.
(SODA SPRINGS PLANT)
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MOUNTAIN H
AIR FORCE BA
IDAHO
EPA ID# ID3572124557
EPA REGION 10
Elmore County
Southwest of Mountain Home
Site Description
Mountain Home Air Force Base was established in 1943 and is located on approximately 9
square miles of land on a plateau southwest of Mountain Home. The base has been under the
control of the Tactical Air Command since 1965. Hazardous materials have been used for aircraft
maintenance and industrial operations. Wastes, some hazardous, have been generated from these
operations at Mountain Home. Historically, base wastes were disposed of by several methods that
were acceptable at that time, including landfilling of solid wastes, discharge of liquid wastes to
sanitary sewers, and the use of waste oil in fire training exercises and road oiling. Areas being
evaluated at the base include two abandoned landfills, four abandoned fire training areas, several
industrial operations areas, and an entomology shop yard where pesticides were rinsed from
application equipment. Wastes disposed of at these locations include waste oils, solvents, and
pesticides. The area around the base is primarily agricultural. Wells supporting approximately
14,000 people and land irrigation are 3 miles from hazardous substances on the base. On-base
water supply wells are the only source of drinking water for base residents and workers.
Site Responsibility:
This site is being addressed through
Federal actions.
NPL LISTING HISTORY
Proposed Date: 07/14/89
Final Date: 08/30/90
Threats and Contaminants
Trichloroethylene (TCE) has been found in the base drinking water wells at levels
below EPA-established safe drinking water levels. Contaminants in wastes on site
include TCE, benzene, polycyclicaromatic hydrocarbons (PAHs), bromoform, and the
pesticides DDT, dieldrin, and lindane.
January 1995
-------
Cleanup Approach
The site is being addressed in three long-term remedial phases focusing on cleanup of the base
landfills, the fire training pit, and the base wells area.
Response Action Status
Early Action: A removal action was completed at the Low-Level Radioactive
Material Burial Area. One drum was removed and no contamination was found.
Abandoned Landfills: An investigation and risk assessment were conducted for the
B Street Landfill and the Lagoon Landfill. It was determined that the B Street
Landfill does not pose an unacceptable risk to human health and the environment. In
the summer of 1993, EPA selected a "No Action" remedy for this landfill. Additional data is
needed to determine whether the cleanup actions are required at the Lagoon Landfill.
Fire Training Areas: An investigation and risk assessment were conducted at the
Fire Training Area 8. It was determined that the area does not pose an unacceptable
risk to human health and the environment. A "No Action" remedy was selected in
the summer of 1992.
Base Wells Area: In 1992, an investigation began to determine the type and extent
of contamination of groundwater related to other potential hazardous areas on the
base, including old fire training areas, old waste oil disposal areas, and ordnance
disposal areas. Once the investigation has been completed, expected in mid-1995,
recommendations will be made for the most effective cleanup methods.
Other Areas: An investigation was conducted at the Entomology Shop, the Former
Auto Hobby Shop, the Flight Line Storm Drain, and the Vehicle Wash Rack, the
Munitions Disposal/Popping Furnace, the Drum Accumulation Pad, and Fire
Training Area 8 Underground Storage Tank. The EPA is currently considering recommendations
for the most effective remedies for cleaning up these areas.
Site Facts: The Mountain Home 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.
January 1995 2 MOUNTAIN HOME AIR FORCE BASE
-------
Environmental Progress
After listing this site on the NPL, the EPA conducted preliminary evaluations and determined that
the site does not pose an immediate threat to human health or the environment. The Air Force,
under guidance from the EPA, is conducting investigations at several contamination areas, which
will lead to the selection of the most appropriate cleanup remedies for these areas of the
Mountain Home Air Force Base site.
Site Repository
Mountain Home Public Library, 790 North 10th, East, Mountain Home, ID 84647
MOUNTAIN HOME AIR FORCE BASE
January 1995
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PACIFIC HIDE
FUR RECYCLI
IDAHO
EPA ID# IDD098812878
EPA REGION 10
Bannock County
Pocatello
Other Names:
McCarty/Pacific Hide & Fur
Site Description
The Pacific Hide & Fur Recycling Company site covers approximately 17 acres near commercial
and residential areas in Pocatello. The site was used as a metal salvage yard from the late 1950s
to 1983. The current owners of the site are McCarty's, Inc., Pacific Hide and Fur Depot, Inc.,
and Union Pacific Railroad. Most of the site has been used for the disposal of scrap metal
including vehicles, truck bodies, machinery, wire rope, tin cans, and other debris. At the center
of the site is a 20-foot-deep gravel pit where battery casings, spent automotive oil filters, and
other debris were disposed of, as well as transformer carcasses and capacitors containing
polychlorinated biphenyls (PCBs). The Union Pacific Railroad Sludge Pit site, which is also on
the NPL, is located approximately 300 yards from the site. The Portneuf River is located about
1,100 feet south of the site. The population of the City of Pocatello is approximately 45,000;
however, the immediate vicinity of the site is sparsely populated. The city is supplied with
drinking water from wells within 3 miles of the site. Private and industrial wells draw from the
lower aquifer that lies under the site.
Site Responsibility:
This site is being addressed through a
combination of Federal and potentially
responsible parties' actions.
NPL LISTING HISTORY
Proposed Date: 09/08/83
Final Date: 09/21/84
Threats and Contaminants
Soils, both on and off the site, are contaminated with PCBs, lead, and other inorganic
compounds from prior waste disposal activities. Adverse health effects may result
from accidentally ingesting or making direct contact with contaminated soil.
Cleanup Approach
The site is being addressed in three stages: early actions and two long-term remedial phases
focusing on cleanup of the soils and lead contamination.
January 1 995
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Response Action Status
Early Actions: In 1983, the EPA removed 593 capacitors, 30 cubic yards of
contaminated soils, and 21 drums containing hazardous materials. Monitoring wells
and a security fence around 11 acres of the site also were installed. The
decontamination of large scrap materials was accomplished in 1989.
Soils: In 1988, the following remedies were selected for cleanup of the site:
excavation of soil to an average of 1 1/2 feet, followed by screening to separate large
contaminated materials and testing for further contamination; stabilization of the most
highly contaminated soil using a fixation technique; construction of a bottom clay liner, where
necessary; capping of the stabilized and remaining materials; and deed and access restrictions.
Because the fixation technology was found to be impracticable, on-site containment was selected.
However, additional studies performed at the site indicated the presence of lead in soils at
unacceptable concentrations. Based on these results, the EPA postponed implementation of the
remedy for on-site containment of the PCB-contaminated soil until the lead contamination could
be fully characterized. In early 1992, an amendment to the original remedy was issued. The
amendment called for excavation of PCB- and mixed PCB/lead-contaminated soils. Lead-
contaminated soils which were above EPA standards were stabilized prior to disposal in an off-
site permitted landfill. All other contaminated soils were placed in an EPA approved off-site
landfill. Site restoration followed decontamination of the scrap, which remains under protective
cover on site. The cleanup was completed in the fall of 1993.
Lead Contamination: In the fall of 1993, the EPA initiated an investigation
exploring the nature and extent of lead and other metal contamination of the soil.
This investigation, which will lead to the selection of final cleanup remedies, is
scheduled for completion in 1995.
Environmental Progress
By conducting early removal actions, constructing a security fence to restrict access to the Pacific
Hide & Fur Recycling site, and completing the cleanup of PCB-contaminated soils, the potential
for exposure to hazardous materials was significantly reduced while further investigations leading
to cleanup of lead contamination is underway.
Site Repository
Pocatello Public Library, 812 East Clarke Street, Pocatello, ID 83201
January 1 995
PACIFIC HIDE & FUR RECYCLING CO.
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TRIUMPH MINE
TAILINGS PILES
IDAHO
EPA ID# IDD984666024
Site Description
EPA REGION 10
Blaine County
Triumph
The Triumph Mine Tailings Piles site consists of two large tailings piles and a now inactive mine
which occupy a combined 60 acres. The site is located in a relatively rural area of Blaine
County, Idaho. The East Fork of the Wood River flows near the southern edge of the piles.
From 1882 until 1957, the Triumph Mine processed silver, zinc, and lead ore. These operations
involved crushing, grinding, and flotation activities. The slurry remaining from the flotation
process was pumped into the upper pile from 1882 until 1930, and into the lower pile for the
remaining years of site operations. The EPA's preliminary site investigations in 1991 and 1992
showed elevated levels of heavy metals, such as lead and arsenic, in the piles and the former
mine. These metals have migrated into the surrounding residential soil, ambient air, and
neighboring wetlands. In addition, studies have revealed lead levels above Federal drinking
water standards in one municipal well in the area. These lead levels appear to vary seasonally.
On three occasions, the State of Idaho and local health agencies conducted bloodstream sampling
of local residents for lead and urine sampling for arsenic. Although there were some signs of
community exposure to these heavy metals, the levels were not above national averages.
Site Responsibility:
The site is being addressed through
Federal and State actions.
NPL LISTING HISTORY
Proposed Date: 05/10/93
Threats and Contaminants
EEJ
The tailings piles and the mine contain elevated levels of heavy metals, such as lead
and arsenic. These metals also have migrated into the surrounding residential soil,
ambient air, neighboring wetlands, and surface water. Studies revealed lead levels
above Federal drinking water standards in one municipal well in the area. People who
inhale airborne tailings, or touch or ingest contaminated soils, tailings, or drinking
water may be at risk.
January 1995
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Cleanup Approach
This site is being addressed in a long-term remedial phase focusing on the cleanup of the entire
site.
Response Action Status
Entire Site: The State of Idaho is planning a site investigation to determine the
nature and extent of contamination. The State and the ATSDR also are considering
options for early cleanup actions at the site.
Site Facts: In 1992, the EPA conducted interviews with community members to determine the
best options for reducing potential exposure to the contaminants. Community members also have
formed a workgroup to encourage public participation in the decision-making process. The EPA
and the State of Idaho signed a Memorandum of Agreement to defer oversight of this site to the
State of Idaho.
Environmental Progress
The EPA and the ATSDR currently are evaluating early action options for reducing potential
exposure to contaminants while site studies are being planned.
Site Repository
Not yet established.
January 1995
TRIUMPH MINE TAILINGS PILES
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UNION PACIFIC
RAILROAD CO.
IDAHO
EPA ID# IDD055030852
Site Description
EPA REGION 10
Bannock County
Pocatello
The Union Pacific Railroad Co. (UPRR) Sludge Pit site comprises about 1 acre in Pocatello.
From 1961 until 1983, UPRR dumped sludge from its wastewater treatment plant into a 1-acre
unlined sludge pit. The McCarty/Pacific Hide & Fur site, another NPL site, is located
approximately 300 yards from the pit. There are approximately 45,000 people living within 4
miles of the site, but the immediate area is very sparsely populated. Private and municipal wells
are located within a mile of the site. Private wells in the area draw from the lower aquifer. The
municipal wells for the City of Pocatello are located within 3 miles of the site.
Site Responsibility:
This site is being addressed through
Federal and potentially responsible
parties' actions.
NPL LISTING HISTORY
Proposed Date: 09/08/83
Final Date: 09/21/84
Threats and Contaminants
In 1983, the EPA found that seepage from UPRR's sludge pit and from an area in the
vicinity of the sludge pit where an oil tie treating facility was located, were
contributing to upper aquifer, and to some extent, lower aquifer groundwater
contamination. Samples from private drinking water wells, completed in the lower
aquifer in the vicinity of UPRR's property, contained low levels of organic
compounds consistent with the wastes discharged into the pit. The level of these
contaminants was below EPA drinking water standards. The greatest threat to
groundwater is the migration of contaminants from the upper aquifer to the lower
aquifer. The sludge/soil material in the pit area is contaminated with heavy metals,
poly cyclic aromatic hydrocarbons (PAHs), and organic compounds. The sludge pit
area is completely fenced, restricting public access. The potential health threats of
greatest concern are drinking contaminated groundwater and ingesting sludge from the
pit. Studies also have confirmed that runoff from the site does not flow from the
sludge pit into the nearby Portneuf River.
January 1995
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Cleanup Approach
The site is being addressed in a long-term remedial phase focusing on cleanup of the entire site.
Response Action Status
Entire Site: The EPA selected a cleanup approach in 1991, which includes
excavating and disposing of sludge and silt off site, backfilling and capping excavated
areas, extracting and treating groundwater, monitoring groundwater, and instituting
deed restrictions. Design activities were completed in the spring of 1994, and cleanup activities
are scheduled for completion in late 1995.
Site Facts: In 1988, the EPA and the UPRR signed an Administrative Order, requiring UPRR
to conduct a study of the nature and extent of contamination at the site and to recommend cleanup
alternatives. In 1992, the EPA and UPRR signed a Consent Decree requiring UPRR to perform
design and perform cleanup actions.
Environmental Progress
The Union Pacific Railroad Co. site does not pose an imminent threat to the surrounding
population or the environment while final cleanup activities are underway.
Site Repository
Pocatello Public Library, 812 East Clarke Street, Pocatello, ID 83201
January 1995
UNION PACIFIC RAILROAD CO.
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