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FAQ References
<br /> Bommarito,T.,Sparling,D.W.,and Halbrook,R.S.,2010a,
<br /> Q) What is coal tar? Toxicity of coal-tar pavement sealants and ultraviolet radia-
<br /> tion to Ambystoma Maculatum:Ecotoxicology,v. 19,no.6,
<br /> A) Coal tar is a thick,black or brown liquid that is a p, 1,147-1,156.
<br /> byproduct of the carbonization of coal for the steel Bommarito,T.,Sparling,D.W.,and Halbrook,R.S.,2010b,
<br /> industry or the gasification of coal to make coal gas. Toxicity of coal-tar and asphalt sealants to eastern newts,
<br /> Notophthalmus viridescens:Chemosphere,v.81,no.2,
<br /> p. 187-193.
<br /> Q) What is the difference between crude coal tar, Bryer,P.J.,Elliott,J.N.,and Willingham,E.J.,2006,The effects
<br /> coal-tar pitch, and "refined"coal tar? of coal tar based pavement sealer on amphibian development
<br /> and metamorphosis:Ecotoxicology,v. 15,no.3,p.241-247.
<br /> A) Coal-tar pitch is the residue that remains after City of Austin,2005,PAHs in Austin,Texas,sediments and
<br /> various light oils are distilled from crude coal tar for coal-tar based pavement sealants:Watershed Protection
<br /> commercial use. The coal-tar pitch is then separated Department,55 p.,accessed September 14,2010,at
<br /> (refined) into 12 different viscosities,RT-1 (the most http://wwwci.austin.tx.us/watershed/downloads/coaltar_
<br /> fluid) through RT-12 (the most viscous). RT-12 draft_pah study.pdf
<br /> is the viscosity used in coal-tar-based pavement Hansen,D.,and Volland,G., 1998,Study about the contamina-
<br /> sealcoat. Lion of PAH in rooms with tar parquetry adhesive:Otto-Graf-
<br /> sealcoat. v.9,p.48-60.
<br /> International Agency for Research on Cancer, 1980,Coal tars
<br /> and coal tar pitches: accessed September 14,2010,at http://
<br /> Q)How can I tell if a product contains coal tar? ntp.niehs.nih.gov/ntp/roc/eleventh/profiles/s048coalpdf.
<br /> A) To determine if the product has a coal-tar base, MacDonald,D.D.,Ingersoll,C.G.,and Berger,T.A.,2000,
<br /> look for the Chemical Abstracts Service (CAS) Development and evaluation of consensus-based sediment
<br /> number 65996-93-2 on the product Material Safety quality guidelines for freshwater ecosystems:Archives
<br /> of Environmental Contamination and Toxicology,v. 39,
<br /> Data Sheet (MSDS). The words "coal tar," "refined p.20-31.
<br /> coal tar," "refined tar," "refined coal-tar pitch," or Mahler,B.J.,Van Metre,P.C.,Wilson,J.T.,Musgrove,M.,
<br /> other similar terms may be listed on the MSDS or on Burbank,T.L.,Ennis,T.E.,and Bashara,T.J.,2010,Coal-tar-
<br /> the product container. based parking lot sealcoat-An unrecognized source of PAH
<br /> to settled house dust:Environmental Science and Technology,
<br /> v.44,p. 894-900.
<br /> Q)Is sealcoat used on roads? Pinkney,A.E.,Harshbarger,J.C.,and Rutter,M.A.,2009,
<br /> Tumors in brown bullheads in the Chesapeake Bay water-
<br /> A) Use on roads is extremely rare. Occasionally a shed-Analysis of survey data from 1992 through 2006:
<br /> private property, such as a housing development,will Journal of Aquatic Animal Health,v.21,p.71-81.
<br /> choose to have the roads sealcoated. Scoggins,M.,McClintock,N.,Gosselink,L.,and Bryer,P.,
<br /> 2007,Occurrence of polycyclic aromatic hydrocarbons below
<br /> coal-tar-sealed parking lots and effects on stream benthic
<br /> macroinvertebrate communities:Journal of the North Ameri-
<br /> Q)Is use of coal-tar-based sealant regulated? can Benthological Society,v.26,no.4,p.694-707.
<br /> A) Several jurisdictions, including the City of Austin, U.S.Environmental Protection Agency,2009,Integrated Risk
<br /> Texas, the City of Washington, D.C.,Dane County, Information System(IRIS):accessed September 14,2010,at
<br /> Wisconsin, and several suburbs of Minneapolis, http://cfpub.epa.gov/ncea/iris/index.cfm.
<br /> Minnesota, have banned use of coal-tar-based Van Metre,P.C.,and Mahler,B.J.,2010,Contribution of PAHs
<br /> from coal-tar pavement sealcoat and other sources to 40 U.S.
<br /> sealcoat. Similar bans are under consideration in lakes: Science of the Total Environment,v.409,p.334-344.
<br /> other jurisdictions. Van Metre,P.C.,Mahler,B.J.,and Wilson,J.T.,2009,PAHs
<br /> underfoot-Contaminated dust from coal-tar sealcoated
<br /> pavement is widespread in the United States:Environmental
<br /> Science and Technology,v.43,no. 1,p.20-25.
<br /> For more information on USGS research on PAHs and
<br /> coal-tar-based sealcoat go to http://tx.usgs.gov/coring/ Any use of trade,product,or firm names is for descriptive purposes
<br /> allthingssealcoat.html. only and does not imply endorsement by the U.S.Government.
<br /> Publishing support provided by
<br /> Lafayette Publishing Service Center
<br /> B.J. Mahler and P.C. Van Metre
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