02/28/2012 Env Bd Packet - Laserfiche WebLink

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with coal -tar -based sealcoat likely receive more than twice as much PAHs from incidental ingestion of house dust than from their diet. PAH ingestion by children in those settings was estimated to be 14 times higher than by children in apartments adjacent to unsealed parking lots. Some governments have taken action on use of coal -tar -based sealcoat. Fifteen municipalities and two counties in four states (Minnesota, New York, Texas, and Wisconsin), the District of Columbia, and the state of Washington all have enacted some type of ban, affecting almost 10.4 million people. Several national and regional hardware and home - improvement retailers have voluntarily ceased selling coal- tar -based driveway- sealer products. Two kinds of sealcoat products are widely used: coal -tar -based and asphalt -based. The coal -tar products have PAH levels about 1,000 times higher than the asphalt products. Asphalt -based sealcoat is more commonly used on the West Coast and coal -tar -based sealcoat is more commonly used in the Midwest, the South, and the East. Consumers can determine whether a product contains coal tar by reading the product label or the associated Materials Safety Data Sheet (MSDS), available from the applicator, retailer, or on the Internet. • USGS provides science for a changing world. Visit USGS.gov, and follow us on Twitter USGS and our other social media channels. Subscribe to our news releases via e -mail, RSS or Twitter. • •