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 Two kinds of Seal coats products are widly used.
2 Coal tar based sealcoat is the black, shiny substance sprayed or painted on parking lots driveways and playgrounds.
3 The students that preformed this study are from Austin Texas.
4 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.
1. Tar is used on roads, and parking lots.
2. Coal tar is a biproduct of coking coal.
3. The scientists that performed this experiment are from austin texas.
4. Tar is toxic to fish.
5. I learned a lot.
Small particles of sealcoat, which contains extremely high concentrations of PAHs, likely are tracked indoors by residents after they walk across the parking lot.
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.
The students that preformed this study are from Austin Texas
There are two kinds of sealed coats,coal-tar-emulsion based products and asphalt-emulsion based products.
1. Coal-tar is a black shinny substance.
2. 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.
3. Coal tar is a byproduct of the coking of coal.
4.Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight.
5. Coal tar it is toxic to fish and other wild life.
1.) Coal-tar-based sealcoatis the black, shiny subs.tance sprayed or painted on many parking lots, driveways, and playgrounds.
2.) Coal tar seal has been linked to concentrations of the contaminants polycyclic aromatic hydrocarbons dust.
3.)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.
4.)Coal tar is a byproduct of the coking of coal
5.)Coal tar can contain 50 percent or more PAHs by weight
Apartments with parking lots treated with the sealcoat.
It contained house dust with much higher concentrations of PAH’s.
There was students from Austin Texas that performed.
Tar has been linked to contaminants.
Coal tar is a byproduct of the coking of coal.
. Black shiny substance painted over most parking lots is seal coat.
.Tar is in the water that we drink.
.Tar is toxic to fish and other wildlife
There are two kinds of sealed coats,coal-tar-emulsion based products and asphalt-emulsion based products.
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.
1Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight.
2Two kinds of seal coat products are wildley used.
3The scientist in Austin, Texas, that performed this interesting study are from the U.S. Geological Survey .,
. Tar is in the water that we drink
5. It is poisonous to fish and wild life.
1.) Coal-tar is the black shinny substance that is sparayed on parking lots.
2.) Tar is in the water that we drink.
3.) Tar is toxic to fish and other wildlife.
4.) Carcinogens are toxic to fish and other water animals.
5.)It usually wears off quickly espicially in high areas of traffic and has to be resealed every 3 to 5 years.
1)Black shiny substance painted over most parking lots is seal coat.
2)Coal tar is a byproduct of the coking of coal.
3)Small particles of sealcoat are tracked indoors by residents after they walk across the parking lot.
4)Sealcoat products are used in the U.S. a lot.
5)Two kinds of sealcoat products are widely used.
1. Tar is in the water that we drink.
2. Tar has been linked to contaminants.
3.Tar is a toxic to fish and other wildlife.
4.The study was in Austin, Texas.
5.Sealcoat products are often used in the U.S
1.Contaminated house dust is linked to parking lots with coal tar sealant.
2. Coal tar is the byproduct of coking of coal.
3. It is a shiny black substance that is sprayed on p lots, driveways, and playgrounds.
4. The continental divide has something to do with the PAH in coal tar sealant.
5. Seal coat particles are often tracked indoors by residents after they walk on the lot.
1.Coal-Tar is very health hazardous
2.It’s very dangerous to fish and humans
3.Coal-Tar is used very commonly in U.S.
4.2 coal-tar products are used world-wide
5.The study was conducted in Austin Texas
Contominated house dust is linked to parking lots with coal for sealant. Coal tar is a byproduct of the coking of coal, and can contain 50 percent or more PAHs by weight. The scientist in Austin, Texas, that performed this interesting study are from the U.S. Geological Survey. Conciogens are poisions to fish. Sealcoat products are widely used in the U.S.
1. Austin Texas is where the students that preformed the study.
2. Tar is in the water that we drink.
3. Tar is toxic to fish and other wildlife.
4. Coal-tar is a black shinny substance.
5. PAH concentration affects house dust.
1. Conntaminated house dust is linked to parking lots with coal for sealent.
2. Coal-tar-based sealcoat is the black paint that is sprayed in parking lots.
3.The scientists that performed this interesting study are from the U.S Georgraphy Survey.
4. Conciogens are poisions to fish and other wildlife.
5. The study that discovered the contaminated house dust was in Austin,Texas.
1. it had dust
2. it was dangerous
3. people could have gotten sick
4. its deadly
5. watch out
1.)Black shiny substance painted over most parking lots is seal coat
2.. Tar has been linked to contaminants
3.)Caciogens are poisionis to fish
4.“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
5.. Small particles of sealcoat contain extremely high concentrations of PAHs.
1. This article is about contaminated house dust linked to parking lots with coal tar sealant.
2. Coal-tar-based sealcoat is the black paint that is sprayed in parking lots.
3.Coal-Tar is used very commonly in U.S.
4. Coal-tar is a black shinny substance.
5. PAH concentration affects house dust.
1 Tar has been linked to contaminants and it includes the water that we drink.
2 This study was done in Austin, Texas.
3 Tar is the product of coking coal, and contains about 50 percent or more PAHs by weight.
4 The scientists that did this study are from the group called the U.S Georgraphy Survey.
5 It is toxic to fish and other wildlife.
1.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.
2.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
3. Coal tar is a byproduct of the coking of coal.
1.Coal-tar-based sealcoat has been linked to elevated concentrations of the contaminants polycyclic aromatic hydrocarbons.
2.This study was conducted in Austin, Texas, by scientists at the USGS.
3.Coal tar is a byproduct of the coking of coal.
4.Small particles of sealcoa are most likely tracked indoors by people after they walk across the parking lot.
5.The sealcoat wears off of the surface of roads quickly, especially in areas of high traffic.
~ Coal-tar-based sealcoat has been linked to elevated concentrations of the contaminants 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
~ 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.
~ 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 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.
1. Coal-tar is thesubstance that is sparayed on parking lots.
2. Contominated house dust is linked to parking lots.
3. The scientist that performed this interesting study are from the U.S. Geological Survey and is in Austin,Texas.
4. Conciogens are poisions to fish.
5. Sealcoat products are widely used in the U.S.
Apartments with parking lots treated with the sealcoat.
It contained house dust with much higher concentrations of PAH’s.
There was students from Austin Texas that performed.
Tar has been linked to contaminants.
Coal tar is a byproduct of the coking of coal.
1. Tar is used on roads, and parking lots.
2. Coal tar is a biproduct of coking coal.
3. The scientists that performed this experiment are from austin texas.
4. Tar is toxic to fish.
5. I learned a lot.
A study was conducted in Austin, Texas, by scientists at the U.S. Geological Survey (USGS). 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.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.PAHs are an environmental health issue because several are probable human carcinogens and they are toxic to fish and other aquatic life.
1. Tar is used on roads, and parking lots.
2. Coal tar is a biproduct of coking coal.
3. The scientists that performed this experiment are from austin texas.
4. Tar is toxic to fish.
5. I learned a lot.
A study was conducted in Austin, Texas, by scientists at the U.S. Geological Survey. 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 in house dust is 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.PAHs are an environmental health issue because several are probable human carcinogens and they are toxic to fish and other aquatic life.
1. Black tops may cause house dust to be contaminated with polycyclic aromatic hydrocarbons (PAH).
2. PAH’s are bad environmentally because some may cause cancer in humans and they are also toxic to fish.
3. People track in the PAH’s when they walk across a coal-tar-sealcoated parking lot and then enter their houses or apartments.
4. Sealcoat products are common in the U.S.
5. Dust in the east of the Continental Divide had 1,000 times more PAH concentration than in cities west of the Continental Divide.
1. Parking lots that use a coal tar based seal coat are emitting PAH dust into houses near by.
2. These are apparently very unhealthy and harmful to have inside your home.
3. Students conducted a test in Austin, TX, and found that these homes by these parking lots have 600 times more PAH’s than homes not near parking lots.
4. Policy makers may outlaw the use of these coal tar based seal coats.
5. The dust is tracked in on the residencies’ shoes.
1. Particles of seatcoat are tracked indoors by residents after they walk across the parking lot. The seatcoat has a high amount of PAH’s.
2. The PAH’s are said to cause cancer in humans and are toxic to fish.
3. Sealcoat products are widely used in the U.S.
4. Two widely used sealcoats: coal-tar-emulsion based products which are used on the West Coast and asphalt-emulsion based products, which are used in the Midwest, South, and East Coast.
5. Sealcoated parking lots east of the Continental Divide had concentrations of PAHs that were about 1,000 times higher than in dust from sealcoated parking lots west of the Continental Divide.
1. Coal tar is a shiny black substance used for painting parking lots.
2. Coal tar is produced by coking coal.
3. Coal tar can produce polycyclic aromatic hydrocarbons, which can cause cancer and humans and is toxic to fish.
4. PAH is tracked in to houses on the shoes of human.
5. Studies found that housing near black top made out of coal tar are likely to have up to 25 times as much of a PAH ratio.
Small particles of sealcoat, which contains extremely high concentrations of PAHs, likely are tracked indoors by residents after they walk across the parking lot.
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.
The students that preformed this study are from Austin Texas
There are two kinds of sealed coats,coal-tar-emulsion based products and asphalt-emulsion based products.
1. The black, shiny substances that are sprayed or painted on many parking lots, driveways, and playgrounds, had been linked to elevate concentrations of the contaminants polycyclic aromatic hydrocarbons (PAH) in house dust.
2. Coal tar are byproduct of the coking of coal and can contain 50% or more PAH’s by weight.
3. small particles of seal-coat, which mostly contains extremely high concentration of PAH’s.
4. two kinds of seal-coat product are wisely used:coal-tar-emulsion based products, and asphalt-emulsion based product.
5. the study found that apartment adjacent to coal-tar-seal-coat parking lots contained concentrations of PAH’s in house dust with that were 25 times higher than in house dust from apartments with concrete, asphalt, or asphalt-based seal-coat parking lots surfaces.
1.Coal-tar based sealcoat, or blacktop, is a sourse of PAHs, which are household pollutants.
2. Coal-tar is a byproduct of coal producing so it is 50% PAHs by weight.
3. Several PAHs cause cancer or damage aquatic life.
4. Coal-tar based sealcoat has a PAH count that is 530 times the count of PAHs on other parking lots.
5.PAHs get tracked inside by people (or pets) who walk accross coal-tar coated parking lots into their house.
Article Report #4
Date: September 3, 2011
Title: “Contaminated House Dust Linked to Parking Lots With Coal Tar Sealant”
Author: scientists at the U.S. Geological Survey (USGS).
1. Scientists at the United States Geological Survey (USGS) in Austin, TX traced coal-tar-sealcoat to elevated concentrations of the pollutants polycyclic aromatic hydrocarbons (also known as PAHs) in house dust.
2. Coal tar can be comprised of fifty percent or more PAHs by weight and can cause health issues and hazards because multiple PAHs are likely human carcinogens and can be virulent to aquatic life.
3. Small particles of sealcoat are most likely to be tracked indoors by people who walk across parking lots in order to enter their apartment or residential area. As a result these people have a 25% higher risk to track PAHs into their living area.
4. Sealcoat Products are used extensively in the United States. The two most commonly used are coal-tar-emulsion products and asphalt-emulsion based products.
5. The research of PAHs found in sealcoat parking lots have presented advancements in the question of how PAHs are transferred from outdoors to indoors and found in house dust.