Contaminated House Dust Linked to Parking Lots With Coal Tar Sealant
Coal-tar-based sealcoat — the black, shiny substance sprayed or painted on many parking lots, driveways, and playgrounds — has been linked to elevated concentrations of the contaminants polycyclic aromatic hydrocarbons (PAHs) in house dust. Apartments with adjacent parking lots treated with the coal-tar based sealcoat contained house dust with much higher concentrations of PAHs than apartments next to other types of parking lots, according to new research published online in Environmental Science and Technology (ES&T).
The study was conducted in Austin, Texas, by scientists at the U.S. Geological Survey (USGS).
Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight. Coal-tar-based pavement sealants therefore have very high levels of PAHs compared to other PAH sources (e.g., soot, vehicle emissions, used motor oil). PAHs are an environmental health issue because several are probable human carcinogens and they are toxic to fish and other aquatic life.
Small particles of sealcoat, which contains extremely high concentrations of PAHs, likely are tracked indoors by residents after they walk across the parking lot. The study found that apartments adjacent to coal-tar-sealcoated parking lots contained concentrations of PAHs in house dust with that were 25 times higher than in house dust from apartments with concrete, asphalt, or asphalt-based sealcoat parking lot surfaces. The study also found that dust directly on the coal-tar-sealcoated parking lots had PAH concentrations that were 530 times higher than in dust on the parking lots without coal-tar sealcoat.
“These findings represent a breakthrough in our understanding of one of the important sources of these contaminants in house dust and how these contaminants can move from outdoors to indoors. The study provides evidence that will be potentially useful for policy makers,” said Bob Joseph, Director of the USGS Texas Water Science Center.
In the past, several factors have been thought to affect PAH concentrations in house dust, including tobacco smoking and frequency of vacuuming. Researchers have had little success, however, demonstrating a relation between any of those factors and PAH concentrations.
Sealcoat products are widely used in the U.S., both commercially and by homeowners on their driveways. The products are commonly applied to parking lots of commercial businesses (including strip malls and shopping centers); apartment and condominium complexes; churches, schools, and business parks; residential driveways; and playgrounds. The City of Austin, Texas, estimates that before a ban on use of coal-tar-based sealcoat in 2006, about 660,000 gallons of sealcoat was applied every year in the city. The sealcoat wears off of the surface relatively rapidly, especially in areas of high traffic, and manufacturers recommend resealing every three to five years.
Two kinds of sealcoat products are widely used: coal-tar-emulsion based products and asphalt-emulsion based products. National use numbers are not available; however, previous research suggests that 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 on the East Coast.
Previous research by the same group of USGS scientists, published earlier in 2009, demonstrated that dust from sealcoated parking lots in cities east of the Continental Divide had concentrations of PAHs that were about 1,000 times higher than in dust from sealcoated parking lots in cities west of the Continental Divide.
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1) Coal-tar-based sealcoat — the black, shiny substance sprayed or painted on many parking lots, driveways, and playgrounds — has been linked to elevated concentrations of the contaminants polycyclic aromatic hydrocarbons (PAHs) in house dust.
2) Apartments with adjacent parking lots treated with the coal-tar based sealcoat contained house dust with much higher concentrations of PAHs than apartments next to other types of parking lots, according to new research published online in Environmental Science and Technology (ES&T).
3) Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight.
4) Coal-tar-based pavement sealants therefore have very high levels of PAHs compared to other PAH sources (e.g., soot, vehicle emissions, used motor oil).
5) “These findings represent a breakthrough in our understanding of one of the important sources of these contaminants in house dust and how these contaminants can move from outdoors to indoors.In the past, several factors have been thought to affect PAH concentrations in house dust, including tobacco smoking and frequency of vacuuming.
1. This article is about contaminated house dust linked to parking lots with coal tar sealant.
2. Coal-tar is a black shinny substance.
3. Coal tar is a byproduct of the coking of coal.
4. CArcinogens are toxic to fish and othe rwater animals.
5. Small particles of sealcoat contain extremely high concentrations of PAHs.
1. Black shiny substance painted over most parking lots is seal coat.
2. Seal coat has been linked to high consentration of PAHs.
3. PAHs have been found in common house dust.
4. Coal tar is the byproduct of cooking of coal.
5. These findings have a break through our research.
Andrew Rice
1, coal based tar has been linked to elevated concentrations of the contaminants polycyclic aromatic hydrocarbons (PAHs) in house dust.
2.
1. Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight.
2. Small particles of sealcoat are likely tracked indoors by residents after they walk across the parking lot.
3. In the past, several factors have been thought to affect PAH concentrations in house dust including tobacco smoking and frequency of vacuming.
4. Sealcoat products are widely used in the U.S.
5. The City of Austin, Texas, estimates that before a ban on use of coal-tar-based sealcoat in 2006, about 660,000 gallons of sealcoat was applied every year in the city.
1. Coal-tar-based sealcoat the black, shiny substance sprayed or painted on many parking lots, driveways, and playgrounds has been linked to elevated concentrations of the contaminants polycyclic aromatic hydrocarbons(PAHs) in house dust.
2) Apartments with adjacent parking lots treated with the coal-tar based sealcoat c.ntained house dust with much higher concentrations of PAHs than apartments next to other types of parking lots, according to new research published online in Environmental Science and Technology (ES&T).
3.Coal tar is a byproduct of the cooking of coal, and can contain 50 percent or more PAHs by weight.
4. Coal-tar-based pavement sealants therefore have very high levels of PAHs compared to other PAH sources (e.g., soot, vehicle emissions, used motor oil).
5. “These findings represent a breakthrough in our understanding of one of the important sources of these contaminants in house dust and how these contaminants can move from outdoors to indoors.In the past, several factors have been thought to affect PAH concentrations in house dust, including tobacco smoking and frequency of vacuuming
1 Tar has been linked to contaminants.
2 This includes the water that we drink.
3 The study was done in Austin, Texas.
4 Tar is a product of the coking of coal, and contains about 50 percent or more PAHs by weight.
5 It is toxic to fish and other wildlife.
The study was conducted in Austin, Texas, by scientists at the U.S. Geological Survey
Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight
In the past, several factors have been thought to affect PAH concentrations in house dust, including tobacco smoking and frequency of vacuuming
Sealcoat products are widely used in the U.S., both commercially and by homeowners on their driveways
Two kinds of sealcoat products are widely used: coal-tar-emulsion based products and asphalt-emulsion based products. National use numbers are not available
1) Coal-tar-based sealcoat — the black, shiny substance sprayed or painted on many parking lots, driveways, and playgrounds — has been linked to elevated concentrations of the contaminants polycyclic aromatic hydrocarbons (PAHs) in house dust
2) Apartments with adjacent parking lots treated with the coal-tar based sealcoat contained house dust with much higher concentrations of PAHs than apartments next to other types of parking lots, according to new research published online in Environmental Science and Technology
3 The study was conducted in Austin, Texas, by scientists at the U.S. Geological Survey
4) Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight.
5)Coal-tar-based pavement sealants therefore have very high levels of PAHs compared to other PAH sources
1. Coal tar seal has been linked to concentrations of the contaminants polycyclic aromatic hydrocarbons dust.
2. coal tar is the byproduct of the coking oil.
3. 2 kinds of sealcoat products are mostley used: coal-tar-emulsion and asphalt-emulsion.
4. smal sealcoat particals are tracked in by the residents of the apartment building.
5. 660,000 gallons of sealcoat were estimaded to be used last year in Austin Texas
1. Contominated house dust is linked to parking lots with coal for sealant.
2. Coal-tar-based sealcoat is the black paint that is sprayed in parkng lots,driveways & even playgrounds.
3. This study was in Austin, Texas.
4. The scientist that performed this interesting study are from the U.S. Geological Survey (USGS).
5. PAHS are environmental health issue becuase several are probable human carcinogens.
Article summary
1. Coal tar based sealcoat is the black, shiny substance sprayed or painted on parking lots, driveways, and playgrounds.
2. It contaminants PAHs in house dust.
3.Small particles of sealcoat are mostly tracked indoors by people after they walk across the parking lot.
4. Sealcoat products are used a lot in the U.S.
5.In Texas, before the ban on use of coal-tar-based sealcoat in 2006, about 660,000 gallons of sealcoat was applied every year in the city.
1)Coal-tar-based sealcoat — the black, shiny substance sprayed or painted on many parking lots, driveways, and playgrounds — has been linked to elevated concentrations of the contaminants polycyclic aromatic hydrocarbons (PAHs) in house dust.
2)Apartments with adjacent parking lots treated with the coal-tar based sealcoat contained house dust with much higher concentrations of PAHs than apartments next to other types of parking lots
3)this research has been done by the Environmental Science and Technology (ES&T).
4)Coal tar is a byproduct of the coking of coal
5) PAHs are an environmental health issue
Black shiny substance painted over most parking lots is seal coat. Seal coat has been linked to high consentration of PAHs. 660,000 gallons of sealcoat were estimaded to be used last year in Austin Texas. Two kinds of sealcoat products are widely used: coal-tar-emulsion based products and asphalt-emulsion based products. Coal tar is the byproduct of the coking oil.
1)This article is about contaminated house dust linked to parking lots with coal tar sealant.
2)2 kinds of sealcoat products are mostley used coal-tar emulsion and asphalt-emulsion.
3)Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight.
4)The City of Austin, Texas, estimates that before a ban on use of coal-tar-based sealcoat in 2006, about 660,000 gallons of sealcoat was applied every year in the city.
5)Small particles of sealcoat contain extremely high concentrations of PAHs.
1) Shiny black substances painted on parking lots, playgrounds, and drive ways is seal coat.
2) small particles of seal coat have PAH
3)PAH as been found in commom house dust
4)Coal tar is the byproduct of cooking oil
5)Caciogens are poisionis to fish
1. Tar has been linked to contaminants.
2. Coal tar is a byproduct of the coking of coal.
3. Black shiny substance painted over most parking lots is seal coat.
4. PAHs have been found in common house dust.
5. The City of Austin, Texas, estimates that before a ban on use of coal-tar-based sealcoat in 2006, about 660,000 gallons of sealcoat was applied every year in the city.
1. Coal-tar is the paint sprayed on many driveways or playgrounds.
2. Coal tar can hold 50 percent PAHs weight.
3. Sealcoat products are used in the U.S. a lot.
4. Sealcoat products are used on parking lots.
5. PAH concentrations affect house dust.
1. Coal-tar-based sealcoat has been linked to elevated concentrations of PAHs.
2. Apartments with adjacent parking lots treated with the coal-tar based sealcoat contained house dust with much higher concentrations of PAHs.
3. The study was conducted in Austin, Texas, by scientists at the U.S. Geological Survey.
4.Coal tar is a byproduct of the coking of coal.
5.In the past, several factors have been thought to affect PAH concentrations in house dust, including tobacco smoking and frequency of vacuuming.
Coal-tar-based seal-coat has been linked to highly elevated contaminant polycyclic aromatic hydrocarbons.
More dust particles are tracked in by house residents from the parking lot or driveway outside.
This was studied by scientists at (USGS).
Coal tar is another version product of the coking of coal.
These findings represent a breakthrough in were all sorts of dust comes from.
1.coal tar is the byproduct of the coking oil.
2.The study was conducted in Austin,texas.
3.PAHS are toxic to fish and other aquatic life.
4.Two kinds of sealcoat products:coal-tar-emulsion based products and asphalt-emulsion
5.about 660,000 gallons of sealcoat was applied every year in the city.
1. This article is about contaminated house dust linked to parking lots with coal tar sealant.
2. Coal-tar is a black shinny substance.
3. Coal tar is a byproduct of the coking of coal.
4. CArcinogens are toxic to fish and othe rwater animals.
5. Small particles of sealcoat contain extremely high concentrations of PAHs.
1)Coal tar is a bi Product of cooking cool.
2)Coal tar leads to more house dust.
3) PAHs are an environmental are a health issue.
4)PAH are toxic to fish and other aquatic life.
5)Sealcoat products are widely used in the U.S.
1.) Coal-tar-based sealcoat has been linked to elevated concentrations of the contaminants polycyclic aromatic hydrocarbons.
2.)Apartments with adjacent parking lots treated with the coal-tar based sealcoat contained house dust with much higher concentrations of PAHs
3.) Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weigh.
4.) Coal-tar-based pavement sealants therefore have very high levels of PAHs compared to other PAH sources.
5.) PAHs are an environmental health issus because several are probable human carcinogens and they are toxic to fish and other aquatic life.
1.Tar has been linked to contaminants.
2.Seal coat has been linked to high consentration of PAHs.
3. Coal tar is a byproduct of the coking of coal.
4. The City of Austin, Texas, estimates that before a ban on use of coal-tar-based sealcoat in 2006, about 660,000 gallons of sealcoat was applied every year in the city
5. Black shiny substance painted over most parking lots is seal coat.
1. The black, shiny substance sprayed or painted on many parking lots, driveways, and playgrounds has been linked to elevated concentrations of the contaminants.
2. The coal tar is a byproduct of the coking of coal.
3. It also can contain 50 percent or more PAHs by weight.
4. Sealcoat products are widely used in the U.S., espeacially and by homeowners for their driveways.
5. There are two kinds of sealcoat products usually used is coal-tar-emulsion and asphalt-emulsion.
1.Coal-tar-based sealcoat has been linked to elevated concentrations of the contaminants polycyclic aromatic hydrocarbons (PAHs) in house dust.
2.Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight.
3.In the past, several factors have been thought to affect PAH concentrations in house dust, including tobacco smoking and frequency of vacuuming.
4.Two kinds of sealcoat products are widely used: coal-tar-emulsion based products and asphalt-emulsion based products.
5.The City of Austin, Texas, estimates that before a ban on use of coal-tar-based sealcoat in 2006, about 660,000 gallons of sealcoat was applied every year in the city.
1. Coal-tar is a black shinny substance.
2. Coal tar is a byproduct of the coking of coal.
3. Coal tar can contain 50 percent or more PAHs by weight.
4. Coal-tar-emulsion based products and asphalt-emulsion based products are two kinds of sealcoat products.
5. The City of Austin, estimates that before a ban on use of coal-tar-based sealcoat in 2006, about 660,000 gallons of sealcoat was applied every year in the city.
1.) Black shiny substance painted over most parking lots is seal coat.
2.)The study was conducted in Austin,texas.
3.)Sealcoat products are widely used in the U.S.
4.)PAHs have been found in common house dust.
5.) Small particles of sealcoat contain extremely high concentrations of PAHs.
1) Coal-tar-based sealcoat, has been linked to contaminants in house dust.
2) Apartments with parking lots treated with the coal-tar based sealcoat contained house dust with much higher concentrations than apartments next to other types of parking lots..
3) Coal tar is a byproduct of the cooking of coal.
4) Coal-tar-based pavement sealants therefore have very high levels of PAHs.
5)The City of Austin, Texas, estimates that before a ban on use of coal-tar-based sealcoat in 2006, about 660,000 gallons of sealcoat was applied every year in the city.
1.USGS conduct this project.
2.the study was in austin texas
3.tar is a byproduct of the coking of coal
4.pah’s have been found in common house dust
5.parking lots have tons of pah’s
the black shiny substance sprayed or painted on many parking lots, driveways, and playgrounds has been linked to house dust.
Coal tar is a byproduct of the coking of coal.
Sealcoat products are used in the U.S. a lot.
smal sealcoat particals are tracked in by the residents of the apartment building.
The City of Austin, Texas, estimates that before a ban on use of coal-tar-based sealcoat in 2006, about 660,000 gallons of sealcoat was applied every year in the city.
1. Coal tar seal has been linked to concentrations of the contaminants polycyclic aromatic hydrocarbons dust.
2. coal tar is the byproduct of the coking oil.
3. 2 kinds of sealcoat products are mostley used: coal-tar-emulsion and asphalt-emulsion.
4. smal sealcoat particals are tracked in by the residents of the apartment building.
5. 660,000 gallons of sealcoat were estimaded to be used last year in Austin Texas
1.coal-tar-based sealent has been linked to contanimants in house dust.
2.Coal tar is a byproduct from the coking of coal.
3.Coal tar has a very high level of PAHs.
4.The sealcoat product is mainly applied to parking lots of businesses.
5.It usually wears off quickly espicially in high areas of traffic and has to be resealed every 3 to 5 years.
1. Contominated house dust is linked to parking lots with coal for sealant.
2. Coal-tar-based sealcoat is the black paint that is sprayed in parkng lots.
3. The scientist that performed this interesting study are from the U.S. Geological Survey .
4. The study was in Austin, Texas.
5. PAHS are environmental health issues.
1. Coal-tar is a black shinny substance.
2. Tar has been linked to contaminants.
3. PAH concentration affects house dust.
4. Conciogens are poisions to fish.
5. it is toxic to fish and other wild life.
Coal-tar-based sealcoat — the black, shiny substance sprayed or painted on many parking lots, driveways, and playgrounds.
Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight.
PAHs are an environmental health issue because several are probable human carcinogens and they are toxic to fish and other aquatic life.
In the past, several factors have been thought to affect PAH concentrations in house dust, including tobacco smoking and frequency of vacuuming.
Two kinds of sealcoat products are widely used: coal-tar-emulsion based products and asphalt-emulsion based products.
1. Contaminated house dust linked to parking lots with coal tar sealant.
2. Coal-tar is a black shinny substance.
3. Coal tar is a byproduct of the coking of coal.
4. Carcinogens are toxic to fish and othe rwater animals.
5. Small particles of sealcoat contain extremely high concentrations of PAHs.
1.Coal tar is a byproduct of the coking of coal.
2.Black shiny substance painted over most parking lots is seal coat.
3.It is toxic to fish and other wildlife
4.PAH are toxic to fish and other aquatic life.
5.Coal tar can hold 50 percent PAHs weight.
1. Tar has been linked to conserations.
2. Coal-tar sealcoat is in house dust.
3. The study was conducted at Texas
4. Coal has very high PAHs.
5. it is toxic to aquatic life.
1 Tar has been connected to contaminants.
2 Tar is in the water that we drink.
3 The study was done in Austin, Texas.
4 Tar is a product of the coking coal.
5Tar is toxic to fish and other wildlife.
-coal tar is a byproduct of the coking of coal
-coal tar can contain 50% or more PAHs by weight
-apartments with parking lots treated with the coaltar based sealcout contained house dust with higher consentrations of PAHs
-Two kinds of seal coat products are wildley used
- these are coal tar emulision based products and asphalt emulsion based products
1. Coal-tar-based seal coat has been linked to elevated concentrations of the contaminates polycyclic aromatic hydrocarbons in house dust.
2. Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight.
3. Small particles of sealcoat are tracked indoors by residents after they walk across the parking lot.
4. Studies found that apartments adjacent to coal-tar-sealcoated parking lots contained concentrations of PAHs in house dust with that were 25 times higher than in house dust from apartments with concrete, asphalt, or asphalt-based sealcoat parking lot surfaces.
5. Sealcoat products are often used in the U.S.
1. Coal-tar is the black shinny substance that is sparayed on parking lots..
2. Contominated house dust is linked to parking lots with coal for sealant.
3. The scientist in Austin, Texas, that performed this interesting study are from the U.S. Geological Survey .,
4. Conciogens are poisions to fish.
5. It is poisonous to fish and wild life.
1. Coal-tar-based sealcoat has been linked to contaminants in house dust.
2. Apartments with parking lots treated with the sealcoat contained house dust with much higher concentrations of PAHs than apartments with other types of parking lots.
3. Small sealcoat particles are tracked in by the residents of the apartment building.
4. Two kinds of sealcoat products are widely used: coal-tar-emulsion based products and asphalt-emulsion based products.
5. Sealcoat products are widely used in the U.S.
1.) Two kinds of seal coat products are wildley used.
2.) Tar has been linked to contaminants.
3.) It is toxic to fish and other wildlife.
4.) This study was in Austin, Texas.
5.) This was studied by scientists at (USGS).
Coal-tar-based sealcoat — the black, shiny substance sprayed or painted on many parking lots, driveways, and playgrounds.
Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight.
PAHs are an environmental health issue because several are probable human carcinogens and they are toxic to fish and other aquatic life.
In the past, several factors have been thought to affect PAH concentrations in house dust, including tobacco smoking and frequency of vacuuming.
Small particles of sealcoat likely are tracked indoors by residents after they walk across the parking lot.
1.Tar has been linked to contaminants
2.Tar is in the water that we drink.
3.Tar is toxic to fish and other wildlife
4.The City of Austin, Texas, estimates that before a ban on use of coal-tar-based sealcoat in 2006, about 660,000 gallons of sealcoat was applied every year in the city.
5.There are two kinds of sealed coats,coal-tar-emulsion based products and asphalt-emulsion based products.
Two kinds of Seal coats products are widly used
Coal tar based sealcoat is the black, shiny substance sprayed or painted on parking lots driveways and playgrounds
The students that preformed this study are from Austin Texas
Apartments with parking lots treated with the sealcoat contained house dust with much higher concentrations of PAHs than apartments with other types of parking lots
House dust has elevated concentrations of contiminants polycyclicaromatic hydrocarbons.
Sealcoat contains extremely high measures of polycyclicaromatic hydrocarbons.
Sealcoat products are widely used in the U.S., both commercially and by homeowners on their driveways.
Sealcoat is commonly used to fill in parking lots.
Two kinds of sealcoat products are widely used: coal-tar-emulsion based products and asphalt-emulsion based products
The two types of sealcoats are coal-tar-emulsoin and asfalt products.