• toxic coal tar
  • Thousands of sites nationwide where coal was converted into gas for lighting left behind toxic coal tar deposits, including Midway Village in Daly City. (sfgate.com)
  • HRWC is advocating for policy changes and educating residents to protect the watershed from toxic coal tar. (hrwc.org)
  • BEIJING - Cleanup crews in northern China were scrambling Thursday to absorb 60 tons of toxic coal tar accidentally dumped into a river before it reaches a reservoir serving 10 million people, state media said. (foxnews.com)
  • asphalt
  • Coal tar-containing asphalt: Resource or hazardous waste? (vti.se)
  • Coal tar was used in Sweden for the production of asphalt and for the drenching of stabilization gravel until 1973. (vti.se)
  • Approximately 20 million tonnes of tar-containing asphalt is present in the public roads in Sweden. (vti.se)
  • Coal tar sealants contain 1000 times more PAHs than asphalt-based sealants (a readily available alternative) and are the number one source of PAHs in lake sediments. (hrwc.org)
  • The University of Michigan, for example, does not use coal tar sealers and limits asphalt-based sealcoating to special cases. (hrwc.org)
  • Other researchers from the EPA and the University of New Hampshire have found significantly higher PAH levels in runoff from parking lots sealed with coal tar than in runoff from asphalt-sealed lots. (newhampshire.com)
  • Since then, coal gas has almost completely been replaced by natural gas as a fuel, and coal tar as a material for paving roads has been replaced by the petroleum product asphalt. (wikipedia.org)
  • Naturally occurring bitumen is chemically more similar to asphalt than to coal tar, and the term oil sands (or oilsands) is more commonly used by industry in the producing areas than tar sands because synthetic oil is manufactured from the bitumen, and due to the feeling that the terminology of tar sands is less politically acceptable to the public. (wikipedia.org)
  • Sealants
  • Democratic State Representative Pat Boyd of Pomfret applauds the Senate passage of a bill he championed that would prohibit the use of coal tar sealants on state and local highways. (ct.gov)
  • substance
  • Cotton batting, sponge, straw and activated carbon were being used to try to absorb the coal tar - a substance linked to cancer - before it reaches the Wangkuai Reservoir of Baoding, a city of about 10 million, Xinhua said. (foxnews.com)
  • The word "tar" to describe these natural bitumen deposits is really a misnomer, since, chemically speaking, tar is a human-made substance produced by the destructive distillation of organic material, usually coal. (wikipedia.org)
  • soap
  • The FDA issued a letter in February stating that "at this time there is no evidence that topical treatment of dermatological disorders with over-the- counter coal tar shampoo, soap or ointment drug products increases the risk of skin cancers. (sfgate.com)
  • Created by William Valentine Wright in 1860, Wright's Traditional Soap, or Wright's Coal Tar Soap, is a popular brand of antiseptic soap that is designed to thoroughly cleanse the skin. (wikipedia.org)
  • W.V. Wright & Co.'s coal-tar soap was first sold in 1860. (wikipedia.org)
  • By 1898, John Charles Umney had taken over the management of the Coal Tar Soap section of the business. (wikipedia.org)
  • Readers of the Country-Side magazine in 1906 were offered the chance to buy an inexpensive cabinet frame for one shilling, in which they could stack twelve empty Wright's Coal Tar Soap packets to act as sliding drawers in a cabinet for natural history specimens. (wikipedia.org)
  • tons
  • About a quarter mile segment of the Flint River will be dredged to remove tons of soil contaminated with coal tar from a gas plant that closed a century ago. (michiganradio.org)
  • petroleum
  • Oil sands are either loose sands or partially consolidated sandstone containing a naturally occurring mixture of sand, clay, and water, saturated with a dense and extremely viscous form of petroleum technically referred to as bitumen (or colloquially as tar due to its superficially similar appearance). (wikipedia.org)
  • psoriasis
  • These companies included: British Tar Products Lancashire Tar Distillers Midland Tar Distillers Newton, Chambers & Company (owners of Izal brand disinfectant) Sadlers Chemicals According to the National Psoriasis Foundation, coal tar is a valuable, safe and inexpensive treatment option for millions of people with psoriasis and other scalp or skin conditions. (wikipedia.org)
  • polycyclic
  • The tar has high concentrations of polycyclic aromatic hydrocarbons (PAH), some of which may be strongly carcinogenic. (vti.se)
  • Coal tar sealcoats are incredibly high in polycyclic aromatic hydrocarbons, or PAHs. (hrwc.org)
  • products
  • Company representatives say they will remove products with higher coal tar levels and continue to sell others that would not need a label. (sfgate.com)
  • Coal Tar Elastomeric Roofing Membrane products. (arcat.com)
  • Learn how to identify a coal tar or other sealant products with high PAH content. (hrwc.org)
  • paints
  • Coal tar is also used to manufacture paints, synthetic dyes (notably tartrazine/Yellow #5), and photographic materials. (wikipedia.org)
  • permits
  • More precisely it concerns the grain-size distribution of the coal that permits attainment of more than 50% solids (by weight) in the mixture without the use of additives. (google.com)
  • Contrary to what has been reported on the state of the art, however, it has been found surprisingly that a given coal grain-size distribution permits production of coal-tar mixtures containing more than 50% coal and having a viscosity such as to render the mixture easily pumpable and injectable, and without any marked variations with time. (google.com)
  • manufacture
  • People who saw the bituminous sands during this period were familiar with the large amounts of tar residue produced in urban areas as a by-product of the manufacture of coal gas for urban heating and lighting. (wikipedia.org)
  • increases
  • Where coal-tar mixtures are concerned, one limitation to date has been the fact that when the coal content of the mixture exceeds 40% by weight, the apparent viscosity of the mixture increases very rapidly, with the result that at about 50% solids (by weight) the mixture is no longer pumpable. (google.com)
  • Furthermore, above 40% solids (by weight) the apparent viscosity of the coal-tar mixture also increases markedly with time. (google.com)
  • shelves
  • If a shampoo contains more than a 0.5 percent concentration of coal tar, companies must either remove them from shelves or attach the following label: "Warning: This product contains chemicals known to the state of California to cause cancer. (sfgate.com)
  • production
  • During the baking process of the green blocks as a part of commercial graphite production, most of the coal tar binders are vaporised and are generally burned in an incinerator to prevent release into the atmosphere, as COV and coal tar can be injurious to health. (wikipedia.org)
  • public
  • Then, in settlement talks this week before Superior Court Judge Carlos Bea , the following companies agreed to cut coal tar levels or warn the public: Neutrogena, Alva-Amco Pharmacal Cosmetics, Baker Norton Pharmaceuticals and Healthpoint. (sfgate.com)
  • cancer risk
  • In their court filings, the environmental group and the attorney general's office presented studies showing that at the levels allowed by the federal Food and Drug Administration, coal tar created an unacceptable cancer risk. (sfgate.com)
  • materials
  • The results show that reuse of the coal tar-containing materials in new road construction is the most favorable alternative in terms of cost, material use, land use, energy consumption, and air emissions. (vti.se)
  • found
  • Coal-water mixtures and coal-tar mixtures have been found interesting for a variety of reasons, essentially concerning cost, quality and availability. (google.com)