Main Page | See live article | Alphabetical index The Grand Calumet River, originating in the east end of Gary, Indiana, flows 13 miles (21 km) through the heavily industrialized cities of Gary, East Chicago and Hammond. The majority of the river's flow drains into Lake Michigan via the Indiana Harbor and Ship Canal, sending about one billion gallons of water into the lake per day. Today, 90 percent of the river's flow originates as municipal and industrial effluent, cooling and process water and storm water overflows. Although discharges have been reduced, a number of contaminants continue to impair the area of concern (AOC). Table of contents 1 Problems with the urban river 1.1 Nonpoint sources 1.2 Point sources of contaminants 2 Effects of Pollution 3 Progress and Improvements 4 Source Problems with the urban river Problems in the area of concern include contamination from polychlorinated biphenyls (PCBss), polynuclear aromatic hydrocarbons (PAHs) and heavy metals, such as mercury, cadmium, chromium and lead. Additional problems include high fecal coliform bacteria levels, biochemical oxygen demand (BOD) and suspended solids, oil and grease. These contaminants originate from both point and nonpoint sources. Nonpoint sources Contaminated Sediment. The Grand Calumet River and Indiana Harbor and Canal contain 5 to 10 million cubic yards (3.9 to 7.7 million cubic meters) of contaminated sediment up to 20 feet (6 m) deep. Contaminants include toxic compounds (e.g., PAHs, PCBs and heavy metals) and conventional pollutants (e.g., phosphorus, nitrogen, iron, magnesium, volatile solids, oil and grease). Industrial Waste Site Runoff. Stormwater runoff and leachate from 11 of 38 waste disposal and storage sites in the area of concern, located within 0.2 miles (0.3 km) of the river, are degrading AOC water quality. Contaminants include oil, heavy metals, arsenic, PCBs, PAHs and lead. CERCLA Sites. There are 52 sites in the area of concern listed in the federal Comprehensive Environmental Response Compensation and Liability System (CERCLA). Five of these sites are Superfund sites on the National Priorities List (NPL). Hazardous Waste Sites under RCRA. There are 423 hazardous waste sites in the AOC regulated under the Resource Conservation and Recovery Act (RCRA), such as landfills or surface impoundments, where hazardous waste is disposed. Twenty-two of these sites are treatment, storage and disposal facilities. Underground Storage Tanks (USTs). There are more than 460 underground storage tanks in the AOC. More than 150 leaking tank reports have been filed for the Lake County section of the AOC since mid-1987. Atmospheric Deposition. Atmospheric deposition of toxic substances from fossil fuel burning, waste incineration and evaporation enter the AOC through direct contact with water, surface water runoff and leaching of accumulated materials deposited on land. Toxins from this source include dioxins, PCBs, insecticides and heavy metals. Urban Runoff. Rain water passing over paved urban areas washes grease, oil and toxic organics such as PCBs and PAHs into AOC surface waters. Contaminated Groundwater. Groundwater contaminated with organic compounds, heavy metals and petroleum products contaminates AOC surface waters. The United States Environmental Protection Agency (U.S. EPA) estimates that at least 16.8 million gallons (63.6 million liters) of oil float on top of groundwater beneath the AOC. Point sources of contaminants Industrial and Municipal Wastewater Discharges. Three steel manufacturers contribute 90 percent of industrial point source discharges to the AOC. One chemical manufacturer discharges into the AOC. Permitted discharges include arsenic, cadmium, cyanide, copper, chromium, lead and mercury. Three municipal treatment works (Gary, Hammond and East Chicago Sanitary Districts) discharge treated domestic and industrial wastewater into the AOC. Combined Sewer Overflows (CSOs). Fifteen CSOs contribute untreated municipal waste, including conventional and toxic pollutants, to the AOC. Annually, CSO outfalls discharge an estimated 11 billion gallons (41.6 billion liters) of raw wastewater into the harbor and river. Approximately 57% of the annual CSO volume is discharged within eight miles (12.9 km) of Lake Michigan, resulting in nearshore fecal coliform contamination. Historically, the Grand Calumet River supported highly diverse, globally unique fish and wildlife communities. Today, remnants of this diversity near the AOC are found in the Gibson Woods and Pine nature preserves. These areas contain tracks of dune and swale topography and associated rare plant and animals species, such as Franklin's ground squirrel, Blanding's turtle, the glass lizard and the black crowned night heron, among others. The problems mentioned above, however, have impaired many desired uses of the AOC, including the 14 beneficial uses listed below. Effects of Pollution Total fish consumption restrictions exist for the Grand Calumet River, the Indiana Harbor and the Canal. Partial consumption restrictions exist for all of Lake Michigan. The Indiana Department of Environmental Management (IDEM) has identified degraded fish populations, including tainted fish. Tainting of Fish & Wildlife Flavor Degradation of Fish & Wildlife Populations. A lack of food, low dissolved oxygen and toxic stress have destabilized river, harbor and canal resident fish communities. Pollution-tolerant species such as carp and oligochates (worms) dominate. Fish Tumors or Other Deformities Bird or Animal Deformities or Reproductive Problems Degradation of Benthos. Only sludge worms inhabit the Indiana Harbor and ship Canal, suggesting that severe pollution exists. Phytoplankton counts are low in nearshore Lake Michigan. Restrictions on Dredging Activities. Due to concern over disposing of contaminated sediments, no dredging activities have occurred since 1972. Accumulated sediment in the harbor and restrictions on sediment removal have reduced shipping capacity 15%, increasing shipping costs. Eutrophication or Undesirable Algae Restrictions on Drinking Water Consumption, or Taste & Odor Beach Closings. Swimming is prohibited in the river, harbor and canal. The Hammond Beach has been closed for several years. Degradation of Aesthetics. Debris litters the river banks and the canal. The river and harbor often have an oily sheen, and nearshore Lake Michigan waters often appear murky. Degradation of Phytoplankton & Zooplankton Populations Added Cost to Agriculture & Industry Loss of Fish & Wildlife Habitat Progress and Improvements Recent achievements and other projects: U.S. Steel Gary Works plans to begin dredging the East Branch of the Grand Calumet River. The project should begin in 2002 and will last 3 years. On July 20, 2001, the City of Hammond, Indiana acquired the north basin of George Lake. The City of Hammond will consult with the George Lake Watershed-Environmental Advisory Committee on how to restore, preserve and enhance George Lake. The Indiana Department of Environmental Management (IDEM) is working with the RAP technical workgroup, USEPA and GLNPO to develop the AOC delisting guide document. Work began in June 2001. IDEM completes technical work for the Total Maximum Daily Load (TMDL) assessment, May 2001. IDEM and The U.S. Fish and Wildlife Service release the Sediment Injury Report for the Grand Calumet River as part of the Natural Resource Damage Assessment (NRDA), April 2001. IDEM and Illinois-Indiana Sea Grant sponsor: The First Biannual Grand Calumet River: Science in the Area of Concern Symposium at Indiana University Northwest, March 30, 2001. Source This public domain government website. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.