There is a strong consensus among the scientific community that severe health effects can result from long term, low-level exposure to coal tar. That's why the recent entry of Chinese building paper that contains coal tar in the US market poses a serious health concern. Hebei Lixian Qingshan manufactures this product under the Eagle Kraft label and distributes through USA Wire. Routes of exposure to harmful coal tar ingredients include inhalation and skin contact, both of which can occur while installing building paper and handling rolls of product. All efforts should be made to protect workers in the building construction trade from exposure.
In May 2006, Fortifiber contracted an independent testing firm to perform a chemical analysis and determine whether coal tar was present in samples of building paper from Hebei Lixian Qingshan, (supplied to the U.S. market under ICC ESR-2030 and distributed by USA Wire) and our own Super Jumbo Tex® 60 Minute Paper. The report confirmed the presence of coal tar in the Eagle Kraft sample but not in Super Jumbo Tex. In addition, polycyclic aromatic hydrocarbons (PAHs), chemicals known to be present in coal tar, were found in the Hebei Lixian Qingshan sample and quantified in the report. Among the seven PAH compounds detected in this sample, benzo(a)pyrene was measured at 290 mg/kg. Super Jumbo Tex contained no PAHs at the 40 mg/kg detection limit of the analytical test.
The International Agency for Research on Cancer lists coal tar as a "Group One Carcinogen." "Group One" is the classification for substances known to cause cancer in humans, and includes asbestos and gamma radiation. In a U.S. Department of Health and Human Services report issued in August 1995 titled; "Toxicological Profile for Polycyclic Aromatic Hydrocarbons," they found that:
The National Toxicology Program, an interagency governmental program for evaluating public health concerns, has published a substance profile on "Coal Tars and Coal Tar Pitches." This profile states that occupational exposure to coal tar is associated not only with skin and scrotal cancer but "...also has been associated with cancer at other tissue sites, including the lung, bladder, kidney, and digestive tract."
In 1983, OSHA removed asphalt from coverage under the Coal Tar Pitch Violates Standard, citing qualitative and quantitative differences between the volatile materials that arise from coal tar and asphalt. A study that compared the skin carcinogenicity of "roofing asphalt" and "coal tar pitch" reported that asphalt fume material contains less than 1% PAHs, while coal tar pitch fume contains more than 90% PAHs. (Niemeier et al., 1982) The lower levels of PAH compounds in asphalt can be explained because the crude oil from which it is processed contains much lower levels.
A 1982 memorandum, from Patrick Tyson, OSHA Federal Compliance and State Programs Director, asserts that coal tar is hazardous in any form. The memo states that, "The constituents of coal tar pitch are chemical substances that are collected as they volatilize during the destructive distillation of coal to produce coke, which is the distillation residue of coal. This fact places the constituents under the coal tar pitch volatiles standard. It is irrelevant whether the constituents are in solid, liquid or gaseous form." This means that black building paper impregnated with coal tar presents the same risks as any other form of coal tar.
OSHA limits permissible workplace exposure to airborne coal tar pitch violates to 0.2mg/m3 averaged over an 8-hour work shift. The NIOSH recommended limit is 0.1mg/m3 averaged over a 10-hour shift. Precautions to reduce employee exposure include establishing regulated, marked areas, enclosing operations and using local exhaust ventilation or tight fitting respirators, full protective clothing and gloves, thorough washing of clothing and persons immediately following exposure, and not eating, drinking or smoking during exposure or prior to washing.
The Jumbo Tex product line has been used to protect more than 5 million residential and commercial structures, and has been serving the market as the industry's most popular Grade D building paper since the early 1960s. The product is made from asphalt, and has no coal tar in its construction. It is backed by the industry's best 10-year warranty and is made in the U.S.A. utilizing 100% domestic content materials.
California Requires Cancer Warning Label
California's Proposition 65 requires warning labels on products that contain carcinogens. The State requires some products containing coal tar to carry the warning, "This product contains chemicals known to the State of California to cause cancer." In February 2001, the FDA acknowledged that coal tar is a human carcinogen but has not imposed universal labeling requirements to that effect. The Hebei Lixian Qingshan sample contains measurable levels of five different chemicals listed by the State of California EPA as known carcinogens under Proposition 65 (Benzo[a]anthracene, Benzo[b] fluoranthene, Benzo[a]pyrene, Chrysene, and Indeno [1,2.3-cd]pyrene). The product distributed by USA Wire does not currently carry any warning of the possible health effects these chemicals can pose.
Coal Tar Sealants Banned in Austin
Due to extremely high PAH levels found in sediment samples from local waterways in Austin, Texas, the Austin Watershed Protection and Development Review Department undertook a joint study with the US Geological Survey, and documented high levels of PAH chemicals in runoff water from coal tar sealed parking lots. Concentrations were 65 times higher than unsealed lots. When presented with the evidence, the Austin City Council unanimously passed an ordinance in November 2005 to ban the use of coal tar based sealants on parking lots and driveways within the city limits. Based on the action taken in Austin, the city of Madison, Wisconsin is also considering a ban. The US Congress has been briefed and is currently looking at the long term public health effects and a possible national ban.
Additional ResourcesFor more information on the health risks associated with coal tar, please visit the following resources:
International Agency for Research on Cancer
US Department of Health & Human Services: Agency for Toxic Substance and Disease Registry
US Department of Health & Human Services: National Toxicology Program
US Department of Labor: Occupational Safety & Health Administration (OSHA)
Centers for Disease Control & Prevention: The National Institute for Occupational Safety and Health (NIOSH)
Office of Environmental Health Hazard Assessment (OEHHA)