Asphalt Sealer On Car Paint.

Discussion in 'Seal Coating Forum' started by BIGBOY2008, May 12, 2010.

  1. Metro Lawn

    Metro Lawn LawnSite Silver Member
    Messages: 2,116

    I know this is an old post, but just for those that want to know. We get splatter of coal tar sealer all over our spray truck and a rag with some gas or diesel will take it right off, even when dried.
  2. Patriot Services

    Patriot Services LawnSite Fanatic
    Messages: 14,491

    Hopefully this guy isn't still dumping hazmats on the ground. Pretty damn irresponsible and then post it here and try to defend it.
    Posted via Mobile Device
  3. Toy2

    Toy2 LawnSite Bronze Member
    Messages: 1,924

    State and local government sub-contractors do it all the time, is it legal, No, but who's gonna stop it???

    We get that stuff on vehicles all the time, the best thing i found was Dollar store gas treatment, pour it on a rag and wipe away, car wash after that....
  4. Mdirrigation

    Mdirrigation LawnSite Gold Member
    Messages: 3,793

    Coal tar emulsion is not a HAZMAT , if it were you would need a cdl with a hazmat endorsement to carry more than 1000 lbs . But the oil based sealer ( called gilsonite around here ) could be considered a hazmat depending on the composition . I dont have the time or inclination to find out since we use coal tar only . But it would be intresting if someone would find out .
  5. GShield

    GShield LawnSite Member
    Messages: 3

    Coal-tar-based sealcoats are a major source of cancer-causing contaminants that can pollute air, soil, water and wildlife, posing a significant health risk to humans who may breathe, drink or eat them in fish and other food.

    Coal-tar is formed when coal is coked, a process to prepare coal for use as a fuel. Coal-tar base sealants contain high levels of a class of chemicals known as polycyclic aromatic hydrocarbons (PAHs). A mix of different types of PAHs are found in the sealant.

    The long-lived PAHs widely pollute the environment, wildlife and people. These highly dangerous chemicals are expected to cause cancer in people.

    As the black, shiny sealcoats wear away over time, small, dusty particles form. The specks can contain PAHs and other chemicals found in the sealants.

    Wind and water disperse the particles into the surrounding environment. Wind carries the contaminated dust almost everywhere -- into the water, onto other pavements or onto land used for gardens or crops. Potentially, the dust, if very fine, could be breathed in by animals and people.

    The dust is also washed off the surfaces into local lakes, streams and other waterways by rain and snow melt. The stormwater runoff can contain high levels of PAHs. Some researchers suggest that coal-tar based sealcoats are a major source of PAH pollution in streams. Often, high levels of PAHs are found in the sediments of the lakes and streams accepting the stormwater runoff.

    This pollution poses an environmental health risk for the organisms that live in the waterways, including fish that may be eaten by humans. A study of sealcoats in runoff in Austin, Texas, has linked adverse effects in humans and animals to sealcoat dust runoff.

    Coal-tar based sealcoats contain very high levels of PAHs -- up to 30 percent by weight. PAHs are known to cause an array of health effects and pose a significant threat to wildlife and humans.

    Sealcoats are not stable. The coatings break down over time, forming dust that moves the PAHs from the paved surfaces to surrounding areas, including soil, water and air...

    Coal-Tar is ILLEGAL here due to it's hazardous qualities...
    You're destroying our home(Earth) with your negligence.
  6. Toy2

    Toy2 LawnSite Bronze Member
    Messages: 1,924

    Agree, you need to drive around Austin and stop one day at these big road projects, it will surprise you what some of these contractors do when no one is watching...its all about the dollar.....
  7. GShield

    GShield LawnSite Member
    Messages: 3

    Of particular concern are the levels found in residential driveways. PAH levels in the collected dust were above toxic guideline limits for indoor dust and soils. Potentially, the outside dust could pose a human health risk either directly, by someone touching the surface, or indirectly through objects that contact the surface, such as shoes or basketballs.

    Hand to mouth contact is a major route of exposure for infants, children and adults. People can ingest contaminant-laden house dust by touching it then eating without washing their hands. Mouthing toys and other objects is another way babies are exposed.

    Outdoor, PAH-laden dust could also be ingested by hand to mouth contact. The dust could be picked up on hands or carried indoors on the bottom of shoes. It could also be breathed in while working or playing outside (driveways, playgrounds, etc.).

    Scientists estimate that the amount of PAHs released to air nationwide each year from new applications of coal-tar-based sealant are similar to or greater than annual PAH emissions from vehicles. USGS scientists measured PAHs in air above parking lots, with and without sealcoat, in suburban Austin, Texas. In a second study, PAH levels in air and in dried sealant were tracked for one year following sealant application to a parking lot. Two hours after sealcoat application, PAH emissions were 30,000 times higher than those from unsealed pavement. Parking lots with three to eight-year-old sealant released 60 times more PAHs to the air than parking lots without sealant.

    Coal-tar-based sealcoat causes contamination indoors as well as outdoors. Baylor University scientist Spencer Williams used USGS measurements of PAHs in house dust to estimate the potential ingestion of PAHs by young children living near coal-tar-sealed parking lots. Ingestion of PAHs from food has long been thought to be the primary route by which children are exposed to PAHs. Williams’ analysis indicated that children living in apartments adjacent to parking lots 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.
  8. GShield

    GShield LawnSite Member
    Messages: 3

    In the end it all boils down to natural selection... the ones who can't evolve or educate themselves will seal their own fate. If I ever catch anyone polluting, I call the EPA, take pictures and do anything I can to have them fined. People should know better than to **** in their living room and on their food.
  9. Dintlow

    Dintlow LawnSite Member
    Messages: 14

    This is a long boring read but if you read all the info that link provides and still think the studies in Austin weren't flawed then you are an environmentalist that doesn't care about the truth.

    Now I'm not defending someone that dumped sealer all over his buddy's yard but I strongly believe coal tar is much safer than the Austin study suggests.
  10. sealcutter

    sealcutter LawnSite Senior Member
    from PA.
    Messages: 255

    Could you please show me the letter or link me to the blog or forum that you grilled BP for turning the gulf into a dump for year to come. Is this what you do google coal tar sealcoating jump on forums blasting people with what you think is the truth?

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