Coal tar industry fights bans on sealants
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.
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Joe McQuaid's Publisher's Notes: President's offspring always off limits? My grandfather would beg to differ