Sitelab Corporation

PAHs in Parking Lot Sealcoats - Case Study

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There is growing concern - and regulations in the works - over the use of sealcoating products due to their high PAH content.  In the United States and elsewhere, most sealcoats are made from coal tar which can be toxic to aquatic life and threaten public water supplies from rain and runoff. 

Sample was collected from a freshly treated parking lot in Seabrook, New Hampshire. The temperature on this summer day was a hot 100 degrees. The sealcoat was peeled up by car tires in places, making it easy to collect the sample for analysis.

Residents in the town of Pomfret, Connecticut, also submitted a sample for analysis from a street which had been sealcoated by coal tar.  The sealcoat was found on dog's paws, children's basketballs, shoes, car tires and lawns.  The neighborhood is concerned too about potential PAHs from dust getting into their homes, drinking water wells and scrapings from snow plows. 

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Sitelab's field screening tools can be used to quickly check the concentrations of polycyclic aromatic hydrocarbons and determine if it's made from coal tar or alternative petroleum based black top sealants. 

Got samples?  We'll test them for free! Contact Sitelab Corporation for details.

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