List of Superfund sites in Iowa
Encyclopedia
This is a list of Superfund sites in Iowa designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental law. The CERCLA federal law of 1980 authorized the United States Environmental Protection Agency
United States Environmental Protection Agency
The U.S. Environmental Protection Agency is an agency of the federal government of the United States charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress...

 (EPA) to create a list of polluted
Pollution
Pollution is the introduction of contaminants into a natural environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms. Pollution can take the form of chemical substances or energy, such as noise, heat or light...

 locations requiring a long-term response to clean-up hazardous material contaminations. These locations are known as Superfund
Superfund
Superfund is the common name for the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 , a United States federal law designed to clean up sites contaminated with hazardous substances...

 sites, and are placed on the National Priorities List
National Priorities List
The National Priorities List is the list of hazardous waste sites in the United States eligible for long-term remedial action financed under the federal Superfund program. Environmental Protection Agency regulations outline a formal process for assessing hazardous waste sites and placing them on...

 (NPL). The NPL guides the EPA in "determining which sites warrant further investigation" for environmental remediation. As of May 1, 2010, there were eleven Superfund sites on the National Priorities List in Iowa
Iowa
Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...

. One more site has been proposed for entry on the list and ten others have been cleaned up and removed from it.

Superfund sites

CERCLIS ID Name County Reason Proposed Listed Constructioncompleted Partiallydeleted Deleted
IAD042581256 Aidex Corporation Mills
Mills County, Iowa
-2010 census:The 2010 census recorded a population of 15,059 in the county, with a population density of . There were 6,109 housing units, of which 5,605 were occupied.-2000 census:...

Groundwater was contaminated by atrazine
Atrazine
Atrazine, 2-chloro-4--6--s-triazine, an organic compound consisting of an s-triazine-ring is a widely used herbicide. Its use is controversial due to widespread contamination in drinking water and its associations with birth defects and menstrual problems when consumed by humans at concentrations...

 and soil was contaminated by aldrin
Aldrin
Aldrin is an organochlorine insecticide that was widely used until the 1970s, when it was banned in most countries. It is a colourless solid. Before the ban, it was heavily used as a pesticide to treat seed and soil...

, chlordane
Chlordane
Chlordane, or chlordan, is an organochlorine compound that was used as a pesticide. This white solid was sold in the U.S. until 1983 as an insecticide for crops like corn and citrus and on lawns and domestic gardens.-Production and uses:...

 other pesticide
Pesticide
Pesticides are substances or mixture of substances intended for preventing, destroying, repelling or mitigating any pest.A pesticide may be a chemical unicycle, biological agent , antimicrobial, disinfectant or device used against any pest...

s and stored waste, from pesticide production and a 1976 fire on-site.
12/30/1982 09/08/1983
IAD980687933 Des Moines TCE Polk
Polk County, Iowa
Polk County is a county located in the U.S. state of Iowa. The population was 430,640 in the 2010 census, an increase from 374,601 in the 2000 census. The county seat is Des Moines, which is also the capital city of Iowa...

Groundwater and soil contamination by VOCs (including PCE
Tetrachloroethylene
Tetrachloroethylene, also known under its systematic name tetrachloroethene and many other names, is a chlorocarbon with the formula Cl2C=CCl2. It is a colourless liquid widely used for dry cleaning of fabrics, hence it is sometimes called "dry-cleaning fluid." It has a sweet odor detectable by...

, TCE
Trichloroethylene
The chemical compound trichloroethylene is a chlorinated hydrocarbon commonly used as an industrial solvent. It is a clear non-flammable liquid with a sweet smell. It should not be confused with the similar 1,1,1-trichloroethane, which is commonly known as chlorothene.The IUPAC name is...

 and vinyl chloride
Vinyl chloride
Vinyl chloride is the organochloride with the formula H2C:CHCl. It is also called vinyl chloride monomer, VCM or chloroethene. This colorless compound is an important industrial chemical chiefly used to produce the polymer polyvinyl chloride . At ambient pressure and temperature, vinyl chloride...

), pesticide
Pesticide
Pesticides are substances or mixture of substances intended for preventing, destroying, repelling or mitigating any pest.A pesticide may be a chemical unicycle, biological agent , antimicrobial, disinfectant or device used against any pest...

s and herbicide
Herbicide
Herbicides, also commonly known as weedkillers, are pesticides used to kill unwanted plants. Selective herbicides kill specific targets while leaving the desired crop relatively unharmed. Some of these act by interfering with the growth of the weed and are often synthetic "imitations" of plant...

s from former industrial operations and waste disposal practices.
12/30/1982 09/08/1983
IAD980685804 E.I. Dupont De Nemours & Company, Inc. (County Road X23) Lee
Lee County, Iowa
-2010 census:The 2010 census recorded a population of 35,862 in the county, with a population density of . There were 16,205 housing units, of which 14,610 were occupied.-2000 census:...

Groundwater and soil were contaminated by cadmium
Cadmium
Cadmium is a chemical element with the symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Similar to zinc, it prefers oxidation state +2 in most of its compounds and similar to mercury it shows a low...

, lead
Lead
Lead is a main-group element in the carbon group with the symbol Pb and atomic number 82. Lead is a soft, malleable poor metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed...

, other heavy metals, and VOCs from former paint waste disposal. Livestock and approximately 1,200 people within three miles of the site depend on private wells for drinking water.
06/24/1988 08/30/1990
IAD005279039 Electro-Coatings Inc. Linn
Linn County, Iowa
-2010 census:The 2010 census recorded a population of 211,226 in the county, with a population density of . There were 92,251 housing units, of which 86,134 were occupied.-2000 census:...

Groundwater contamination by hexavalent chromium
Hexavalent chromium
Hexavalent chromium refers to chemical compounds that contain the element chromium in the +6 oxidation state. Virtually all chromium ore is processed via hexavalent chromium, specifically the salt sodium dichromate. Approximately of hexavalent chromium were produced in 1985...

, with elevated levels of cadmium
Cadmium
Cadmium is a chemical element with the symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Similar to zinc, it prefers oxidation state +2 in most of its compounds and similar to mercury it shows a low...

, nickel
Nickel
Nickel is a chemical element with the chemical symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile...

 and other heavy metals. Groundwater VOC contamination attributed to neighboring industry. Groundwater contamination has not been detected in municipal drinking water wells.
06/24/1988 10/04/1989
IAD981124167 Fairfield Coal Gasification Plant Jefferson
Jefferson County, Iowa
-2010 census:The 2010 census recorded a population of 16,843 in the county, with a population density of . There were 7,594 housing units, of which 6,846 were occupied.-2000 census:...

Groundwater contamination by PAHs (including anthracene
Anthracene
Anthracene is a solid polycyclic aromatic hydrocarbon consisting of three fused benzene rings. It is a component of coal-tar. Anthracene is used in the production of the red dye alizarin and other dyes...

 and pyrene
Pyrene
Pyrene is a polycyclic aromatic hydrocarbon consisting of four fused benzene rings, resulting in a flat aromatic system. The chemical formula is . This colourless solid is the smallest peri-fused PAH...

), VOCs (including benzene
Benzene
Benzene is an organic chemical compound. It is composed of 6 carbon atoms in a ring, with 1 hydrogen atom attached to each carbon atom, with the molecular formula C6H6....

, toluene
Toluene
Toluene, formerly known as toluol, is a clear, water-insoluble liquid with the typical smell of paint thinners. It is a mono-substituted benzene derivative, i.e., one in which a single hydrogen atom from the benzene molecule has been replaced by a univalent group, in this case CH3.It is an aromatic...

, and xylene
Xylene
Xylene encompasses three isomers of dimethylbenzene. The isomers are distinguished by the designations ortho- , meta- , and para- , which specify to which carbon atoms the two methyl groups are attached...

), lead
Lead
Lead is a main-group element in the carbon group with the symbol Pb and atomic number 82. Lead is a soft, malleable poor metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed...

, mercury
Mercury (element)
Mercury is a chemical element with the symbol Hg and atomic number 80. It is also known as quicksilver or hydrargyrum...

 and cyanide
Cyanide
A cyanide is a chemical compound that contains the cyano group, -C≡N, which consists of a carbon atom triple-bonded to a nitrogen atom. Cyanides most commonly refer to salts of the anion CN−. Most cyanides are highly toxic....

s.
06/24/1988 08/30/1990
IAD022193577 Farmers' Mutual Cooperative Sioux
Sioux County, Iowa
-2010 census:The 2010 census recorded a population of 33,704 in the county, with a population density of . There were 12,279 housing units, of which 11,584 were occupied.-2000 census:...

Three city wells were closed because of groundwater contamination. Site groundwater was contaminated by several pesticide
Pesticide
Pesticides are substances or mixture of substances intended for preventing, destroying, repelling or mitigating any pest.A pesticide may be a chemical unicycle, biological agent , antimicrobial, disinfectant or device used against any pest...

s and carbon tetrachloride
Carbon tetrachloride
Carbon tetrachloride, also known by many other names is the organic compound with the formula CCl4. It was formerly widely used in fire extinguishers, as a precursor to refrigerants, and as a cleaning agent...

. Soil contamination by pesticides is not at levels that are a concern to health.
06/24/1988 08/30/1990
IA7213820445 Iowa Army Ammunition Plant
Iowa Army Ammunition Plant
The mission of the Iowa Army Ammunition Plant , located in Des Moines County in southeastern Iowa, near the city of Burlington, is to manufacture and deliver large caliber items for the Department of Defense using modern production methods in support of worldwide...

Des Moines
Des Moines County, Iowa
-2010 census:The 2010 census recorded a population of 40,325 in the county, with a population density of . There were 18,535 housing units, of which 17,003 were occupied.-2000 census:...

Surface water and groundwater contamination by explosives from munitions processing. Creek sediment contamination by explosives and lead
Lead
Lead is a main-group element in the carbon group with the symbol Pb and atomic number 82. Lead is a soft, malleable poor metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed...

.
07/14/1989 08/30/1990
IAD005291182 John Deere (Ottumwa Works Landfill) Wapello
Wapello County, Iowa
-2010 census:The 2010 census recorded a population of 35,625 in the county, with a population density of . There were 16,098 housing units, of which 14,552 were occupied.-2000 census:...

 
Low-level contamination of soil and sediments by heavy metals and methylene chloride from former disposal activities. Low-level heavy metal contamination of surface water. 06/24/1988 02/21/1990
IAD980631063 Labounty Site Floyd
Floyd County, Iowa
-2010 census:The 2010 census recorded a population of 16,303 in the county, with a population density of . There were 7,526 housing units, of which 6,886 were occupied.-2000 census:...

 
VOCs and arsenic
Arsenic
Arsenic is a chemical element with the symbol As, atomic number 33 and relative atomic mass 74.92. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. It was first documented by Albertus Magnus in 1250.Arsenic is a metalloid...

 leached into a groundwater aquifer that is used for drinking water supplies.
12/30/1982 09/08/1983
IAD000606038 Lawrence Todtz Farm Clinton
Clinton County, Iowa
-2010 census:The 2010 census recorded a population of 49,116 in the county, with a population density of . There were 21,733 housing units, of which 20,223 were occupied.-2000 census:...

 
Groundwater contamination by arsenic
Arsenic
Arsenic is a chemical element with the symbol As, atomic number 33 and relative atomic mass 74.92. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. It was first documented by Albertus Magnus in 1250.Arsenic is a metalloid...

, barium
Barium
Barium is a chemical element with the symbol Ba and atomic number 56. It is the fifth element in Group 2, a soft silvery metallic alkaline earth metal. Barium is never found in nature in its pure form due to its reactivity with air. Its oxide is historically known as baryta but it reacts with...

, lead
Lead
Lead is a main-group element in the carbon group with the symbol Pb and atomic number 82. Lead is a soft, malleable poor metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed...

, other heavy metals, sodium
Sodium
Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal and is a member of the alkali metals; its only stable isotope is 23Na. It is an abundant element that exists in numerous minerals, most commonly as sodium chloride...

, tetrahydrofuran
Tetrahydrofuran
Tetrahydrofuran is a colorless, water-miscible organic liquid with low viscosity at standard temperature and pressure. This heterocyclic compound has the chemical formula 4O. As one of the most polar ethers with a wide liquid range, it is a useful solvent. Its main use, however, is as a precursor...

, benzene
Benzene
Benzene is an organic chemical compound. It is composed of 6 carbon atoms in a ring, with 1 hydrogen atom attached to each carbon atom, with the molecular formula C6H6....

, toluene
Toluene
Toluene, formerly known as toluol, is a clear, water-insoluble liquid with the typical smell of paint thinners. It is a mono-substituted benzene derivative, i.e., one in which a single hydrogen atom from the benzene molecule has been replaced by a univalent group, in this case CH3.It is an aromatic...

 and other VOCs from former waste disposal activities. Nearby wildlife and surface water may have been threatened by contamination.
09/18/1985 06/10/1986
IAD005288634 Lehigh Portland Cement Co. Cerro Gordo
Cerro Gordo County, Iowa
-2010 census:The 2010 census recorded a population of 44,151 in the county, with a population density of . There were 22,163 housing units, of which 19,350 were occupied.-2000 census:...

Ground water on site became contaminated with heavy metals including arsenic
Arsenic
Arsenic is a chemical element with the symbol As, atomic number 33 and relative atomic mass 74.92. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. It was first documented by Albertus Magnus in 1250.Arsenic is a metalloid...

, as well as elevated pH
PH
In chemistry, pH is a measure of the acidity or basicity of an aqueous solution. Pure water is said to be neutral, with a pH close to 7.0 at . Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline...

 levels.
06/24/1988 08/30/1990
IAD980969190 Mason City Coal Gasification Plant Cerro Gordo
Cerro Gordo County, Iowa
-2010 census:The 2010 census recorded a population of 44,151 in the county, with a population density of . There were 22,163 housing units, of which 19,350 were occupied.-2000 census:...

 
Soil, on-site waste, bedrock and groundwater contamination by PAHs. Creek sediments are also contaminated. 01/19/1994 12/16/1994
IAD085824688 Mid-America Tanning Company Woodbury
Woodbury County, Iowa
-2010 census:The 2010 census recorded a population of 102,172 in the county, with a population density of . There were 41,454 housing units, of which 39,052 were occupied.-2000 census:...

 
Soil, impounded sludges and surface water was contaminated with heavy metals, including chromium
Chromium
Chromium is a chemical element which has the symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also odorless, tasteless, and malleable...

. Sludges contain elevated levels of hydrogen sulfide
Hydrogen sulfide
Hydrogen sulfide is the chemical compound with the formula . It is a colorless, very poisonous, flammable gas with the characteristic foul odor of expired eggs perceptible at concentrations as low as 0.00047 parts per million...

.
06/24/1988 03/31/1989
IAD069625655 Midwest Manufacturing/North Farm Jasper
Jasper County, Iowa
-2010 census:The 2010 census recorded a population of 36,842 in the county, with a population density of . There were 16,181 housing units, of which 14,806 were occupied.-2000 census:...

 
Groundwater contamination by VOCs such as vinyl chloride
Vinyl chloride
Vinyl chloride is the organochloride with the formula H2C:CHCl. It is also called vinyl chloride monomer, VCM or chloroethene. This colorless compound is an important industrial chemical chiefly used to produce the polymer polyvinyl chloride . At ambient pressure and temperature, vinyl chloride...

, TCE
Trichloroethylene
The chemical compound trichloroethylene is a chlorinated hydrocarbon commonly used as an industrial solvent. It is a clear non-flammable liquid with a sweet smell. It should not be confused with the similar 1,1,1-trichloroethane, which is commonly known as chlorothene.The IUPAC name is...

 and DCE, cadmium
Cadmium
Cadmium is a chemical element with the symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Similar to zinc, it prefers oxidation state +2 in most of its compounds and similar to mercury it shows a low...

 and zinc
Zinc
Zinc , or spelter , is a metallic chemical element; it has the symbol Zn and atomic number 30. It is the first element in group 12 of the periodic table. Zinc is, in some respects, chemically similar to magnesium, because its ion is of similar size and its only common oxidation state is +2...

 from former electroplating operationgs. Site soils contain elevated levels of heavy metals.
09/18/1985 06/10/1986
IAD980852461 Northwestern States Portland Cement Co. Cerro Gordo
Cerro Gordo County, Iowa
-2010 census:The 2010 census recorded a population of 44,151 in the county, with a population density of . There were 22,163 housing units, of which 19,350 were occupied.-2000 census:...

 
Groundwater had elevated pH
PH
In chemistry, pH is a measure of the acidity or basicity of an aqueous solution. Pure water is said to be neutral, with a pH close to 7.0 at . Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline...

 and was contaminated by sulfates and sodium
Sodium
Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal and is a member of the alkali metals; its only stable isotope is 23Na. It is an abundant element that exists in numerous minerals, most commonly as sodium chloride...

 from former waste disposal practices, though drinking water wells were not affected. Sediments, soil and surface water had high pH considered caustic.
06/24/1988 08/30/1990
IAD980852578 Peoples Natural Gas Company Dubuque
Dubuque County, Iowa
Dubuque County is a county located in the U.S. state of Iowa. The population was 93,653 in the 2010 census, an increase from 89,143 in the 2000 census. The county seat is the city of Dubuque. Dubuque County is coterminous with the Dubuque, Iowa Metropolitan Statistical Area, and is the seventh...

 
Groundwater and soil contamination by VOCs, phenols
Phenols
In organic chemistry, phenols, sometimes called phenolics, are a class of chemical compounds consisting of a hydroxyl group bonded directly to an aromatic hydrocarbon group...

, PAHs, and inorganic compound
Inorganic compound
Inorganic compounds have traditionally been considered to be of inanimate, non-biological origin. In contrast, organic compounds have an explicit biological origin. However, over the past century, the classification of inorganic vs organic compounds has become less important to scientists,...

s from process waste. Nearby wetlands and fish and wildlife refuge may be threatened by runoff.
06/24/1988 08/30/1990
IA0001610963 Railroad Avenue Ground Water Contamination Site Polk
Polk County, Iowa
Polk County is a county located in the U.S. state of Iowa. The population was 430,640 in the 2010 census, an increase from 374,601 in the 2000 census. The county seat is Des Moines, which is also the capital city of Iowa...

 
Groundwater contamination by TCE
Trichloroethylene
The chemical compound trichloroethylene is a chlorinated hydrocarbon commonly used as an industrial solvent. It is a clear non-flammable liquid with a sweet smell. It should not be confused with the similar 1,1,1-trichloroethane, which is commonly known as chlorothene.The IUPAC name is...

, DCE and vinyl chloride
Vinyl chloride
Vinyl chloride is the organochloride with the formula H2C:CHCl. It is also called vinyl chloride monomer, VCM or chloroethene. This colorless compound is an important industrial chemical chiefly used to produce the polymer polyvinyl chloride . At ambient pressure and temperature, vinyl chloride...

. Several minucipal water supply wells were contaminated and taken off-line but have now been returned to service after clean-up activities.
09/13/2001 09/05/2002
IAD980632509 Red Oak City Landfill Montgomery
Montgomery County, Iowa
-2010 census:The 2010 census recorded a population of 10,740 in the county, with a population density of . There were 5,239 housing units, of which 4,558 were occupied.-2000 census:...

 
Soil, groundwater and surface water contaminated by low concentrations of VOCs, including toluene
Toluene
Toluene, formerly known as toluol, is a clear, water-insoluble liquid with the typical smell of paint thinners. It is a mono-substituted benzene derivative, i.e., one in which a single hydrogen atom from the benzene molecule has been replaced by a univalent group, in this case CH3.It is an aromatic...

 and xylene
Xylene
Xylene encompasses three isomers of dimethylbenzene. The isomers are distinguished by the designations ortho- , meta- , and para- , which specify to which carbon atoms the two methyl groups are attached...

, and heavy metals, including chromium
Chromium
Chromium is a chemical element which has the symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also odorless, tasteless, and malleable...

, lead
Lead
Lead is a main-group element in the carbon group with the symbol Pb and atomic number 82. Lead is a soft, malleable poor metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed...

 and barium
Barium
Barium is a chemical element with the symbol Ba and atomic number 56. It is the fifth element in Group 2, a soft silvery metallic alkaline earth metal. Barium is never found in nature in its pure form due to its reactivity with air. Its oxide is historically known as baryta but it reacts with...

 from former landfilling practices. Nearby sediments contain toluene. Permeable soil makes groundwater contamination more likely.
06/10/1986 03/31/1989
IAD980630560 Shaw Avenue Dump Floyd
Floyd County, Iowa
-2010 census:The 2010 census recorded a population of 16,303 in the county, with a population density of . There were 7,526 housing units, of which 6,886 were occupied.-2000 census:...

 
Groundwater, soil and the Cedar River are contaminated by arsenic
Arsenic
Arsenic is a chemical element with the symbol As, atomic number 33 and relative atomic mass 74.92. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. It was first documented by Albertus Magnus in 1250.Arsenic is a metalloid...

 from disposal of arsenic-contaminated pharmaceutical manufacturing waste and sludge from a water treatment plant that received liquid waste from the same site.
09/18/1985 07/22/1987
IAD980630750 Sheller-Globe Corp. Disposal Lee
Lee County, Iowa
-2010 census:The 2010 census recorded a population of 35,862 in the county, with a population density of . There were 16,205 housing units, of which 14,610 were occupied.-2000 census:...

 
Waste material was formerly periodically burnt and the ash, which was contaminated with metals, was scattered over the site. 05/05/1989 08/30/1990
IAD980630487 Vogel Paint and Wax Company Sioux
Sioux County, Iowa
-2010 census:The 2010 census recorded a population of 33,704 in the county, with a population density of . There were 12,279 housing units, of which 11,584 were occupied.-2000 census:...

 
Soil contamination by VOCs and heavy metals including chromium
Chromium
Chromium is a chemical element which has the symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also odorless, tasteless, and malleable...

 and lead
Lead
Lead is a main-group element in the carbon group with the symbol Pb and atomic number 82. Lead is a soft, malleable poor metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed...

 from former waste disposal practices. Groundwater contamination by VOCs, including benzene
Benzene
Benzene is an organic chemical compound. It is composed of 6 carbon atoms in a ring, with 1 hydrogen atom attached to each carbon atom, with the molecular formula C6H6....

, ethyl benzene, ethyl methyl ketone, toluene
Toluene
Toluene, formerly known as toluol, is a clear, water-insoluble liquid with the typical smell of paint thinners. It is a mono-substituted benzene derivative, i.e., one in which a single hydrogen atom from the benzene molecule has been replaced by a univalent group, in this case CH3.It is an aromatic...

 and xylene
Xylene
Xylene encompasses three isomers of dimethylbenzene. The isomers are distinguished by the designations ortho- , meta- , and para- , which specify to which carbon atoms the two methyl groups are attached...

, and metals.
10/15/1984 06/10/1986
IAD984566356 Waterloo Coal Gasification Plant Black Hawk
Black Hawk County, Iowa
-2010 census:The 2010 census recorded a population of 131,090 in the county, with a population density of . There were 55,887 housing units, of which 52,470 were occupied.-2000 census:...

Soil and groundwater contamination by PAHs, benzene
Benzene
Benzene is an organic chemical compound. It is composed of 6 carbon atoms in a ring, with 1 hydrogen atom attached to each carbon atom, with the molecular formula C6H6....

, ethylbenzene
Ethylbenzene
Ethylbenzene is an organic compound with the formula C6H5CH2CH3. This aromatic hydrocarbon is important in the petrochemical industry as an intermediate in the production of styrene, which in turn is used for making polystyrene, a common plastic material....

, toluene
Toluene
Toluene, formerly known as toluol, is a clear, water-insoluble liquid with the typical smell of paint thinners. It is a mono-substituted benzene derivative, i.e., one in which a single hydrogen atom from the benzene molecule has been replaced by a univalent group, in this case CH3.It is an aromatic...

 and xylene
Xylene
Xylene encompasses three isomers of dimethylbenzene. The isomers are distinguished by the designations ortho- , meta- , and para- , which specify to which carbon atoms the two methyl groups are attached...

. There is a risk of impact on wetlands and wildlife.
10/14/1992
IAD065210734 White Farm Equipment Co. Dump Floyd
Floyd County, Iowa
-2010 census:The 2010 census recorded a population of 16,303 in the county, with a population density of . There were 7,526 housing units, of which 6,886 were occupied.-2000 census:...

 
Groundwater contamination by VOCs and heavy metals, including arsenic
Arsenic
Arsenic is a chemical element with the symbol As, atomic number 33 and relative atomic mass 74.92. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. It was first documented by Albertus Magnus in 1250.Arsenic is a metalloid...

, chromium
Chromium
Chromium is a chemical element which has the symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also odorless, tasteless, and malleable...

, copper
Copper
Copper is a chemical element with the symbol Cu and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. Pure copper is soft and malleable; an exposed surface has a reddish-orange tarnish...

, lead
Lead
Lead is a main-group element in the carbon group with the symbol Pb and atomic number 82. Lead is a soft, malleable poor metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed...

, nickel
Nickel
Nickel is a chemical element with the chemical symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile...

 and zinc
Zinc
Zinc , or spelter , is a metallic chemical element; it has the symbol Zn and atomic number 30. It is the first element in group 12 of the periodic table. Zinc is, in some respects, chemically similar to magnesium, because its ion is of similar size and its only common oxidation state is +2...

 from former waste disposal practices. Sediments, soil and surface water also contain heavy metals. Local wetlands may have been at risk.
06/24/1988 08/30/1990

See also


External links

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