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Posted March 28. 2013 12:51PM

Coal tar industry fights bans on sealants

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The USGS scientists also found that parking lots with 3- to 8-year-old sealant released 60 times more PAHs into the air than parking lots without sealant. 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.