Newly applied coal-tar-based sealcoat is dark black, sharply contrasting with the unsealed asphalt parking lot below. Coal-tar-based sealcoat is a potent source of polycyclic aromatic hydrocarbons (PAHs).
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Black newly applied sealcoat contrasts with unsealed asphalt
Newly applied coal-tar-based sealcoat is dark black, sharply contrasting with the unsealed asphalt parking lot below. Coal-tar-based sealcoat is a potent source of polycyclic aromatic hydrocarbons (PAHs).
Worn sealcoat around a storm drain.
Coal-tar-based sealcoat, a potent source of polycyclic aromatic hydrocarbons (PAHs), abrades into fine particles with time. Here, runoff containing abraded particles goes down a storm drain and is delivered to a nearby lake. Read more about coal-tar-based sealcoat and PAHs here.
Coal-tar-based sealcoat, a potent source of polycyclic aromatic hydrocarbons (PAHs), abrades into fine particles with time. Here, runoff containing abraded particles goes down a storm drain and is delivered to a nearby lake. Read more about coal-tar-based sealcoat and PAHs here.
Worn sealcoat in Milwaukee, WI
Coal-tar-based sealcoat, a potent source of polycyclic aromatic hydrocarbons (PAHs), abrades into fine particles with time. Here, runoff containing abraded particles goes down a storm drain and is delivered to a nearby lake. Read more about coal-tar-based sealcoat and PAHs here.
Coal-tar-based sealcoat, a potent source of polycyclic aromatic hydrocarbons (PAHs), abrades into fine particles with time. Here, runoff containing abraded particles goes down a storm drain and is delivered to a nearby lake. Read more about coal-tar-based sealcoat and PAHs here.
USGS Employee At Work
Bill Foreman, research chemist at the National Water Quality Laboratory, prepares a soil sample for the National Water Quality Assessment Program.
Bill Foreman, research chemist at the National Water Quality Laboratory, prepares a soil sample for the National Water Quality Assessment Program.
Apalachicola River Near Bristol, FL
View of the apalachicola River looking upstream from in a bluff in the Nature Conservancy's Apalchicola Bluffs and Ravines Preserve.
View of the apalachicola River looking upstream from in a bluff in the Nature Conservancy's Apalchicola Bluffs and Ravines Preserve.
USGS Employee At Work
Tom Custer, Ann Secord (USFWS), and Paul Dummer transport swallow boxes to place along the Hudson River, NY.
Tom Custer, Ann Secord (USFWS), and Paul Dummer transport swallow boxes to place along the Hudson River, NY.
Chief Mountain
Chief Mountain
Water quality sampling on San Francisco Bay
USGS conducts water quality sampling to describe changes in water quality along the deep channel of the San Francisco Bay-Delta system. Sampling includes continuious sampling and discrete sampling. Here a water discrete water sample is collected using a Niskin sampler at sunset in north San Francisco Bay.
USGS conducts water quality sampling to describe changes in water quality along the deep channel of the San Francisco Bay-Delta system. Sampling includes continuious sampling and discrete sampling. Here a water discrete water sample is collected using a Niskin sampler at sunset in north San Francisco Bay.
Long Island farm irrigation rig
Long Island sod farm irrigation rig
Long Island sod farm irrigation rig
Research Vessel Polaris
San Fracisco Bay, CA; Amy Little on Research Vessel Polaris, sampling for water quality constitutents.
San Fracisco Bay, CA; Amy Little on Research Vessel Polaris, sampling for water quality constitutents.
Mist and CLouds Along the North Fork Nooksack River
This wild stretch of the river is along the Nooksack Cirque Trail in North Cascades National Park, about 10 miles upstream of the USGS gage.
This wild stretch of the river is along the Nooksack Cirque Trail in North Cascades National Park, about 10 miles upstream of the USGS gage.
Skagit River Near Newhalem, WA
Summer view of the river.
Summer view of the river.
Thunder Creek Near Newhalem, WA
Near the mouth of Thunder Creek as it comes into the Skagit River.
Near the mouth of Thunder Creek as it comes into the Skagit River.
Diablo Reservoir Near Newhalem, WA
View in late afternoon from a bluff overlooking the lake. USGS operates a gage on this scenic reservoir.
View in late afternoon from a bluff overlooking the lake. USGS operates a gage on this scenic reservoir.
Computer Recycling Farm USA
USGS conducted a study of plastic pollution at this rural US site in the Midwest. The recycler was receiving computers from companies at a rate which greatly exceeded the capacity of the operation. Approximately 50,000 computers remained outdoors on 15 acres for nearly a decade. The site has since been cleaned up.
USGS conducted a study of plastic pollution at this rural US site in the Midwest. The recycler was receiving computers from companies at a rate which greatly exceeded the capacity of the operation. Approximately 50,000 computers remained outdoors on 15 acres for nearly a decade. The site has since been cleaned up.
Sundown Over the Potomac River
On a hike one evening after classes at the National Resources Conservation Center at Shepherdstown, WV, I watched this sunset from the riverbank.
On a hike one evening after classes at the National Resources Conservation Center at Shepherdstown, WV, I watched this sunset from the riverbank.
Groundwater sampling on Long Island
Groundwater sampling on Long Island
Groundwater sampling on Long Island
Long Island marsh water
Long Island marsh water
Long Island marsh water
Appomattox River at Matoaca
Flooding in Appomattox River at Matoaca
Flooding in Appomattox River at Matoaca
Evaportranspiration equipment along the Tracey Segment
Evaportranspiration equipment along the Tracey Segment
Evaportranspiration equipment along the Tracey Segment
Human-Health Science in the US-Mexico Borderlands
Children playing in a makeshift swimming pool at a colonia in Aqua Prieta, Sonora, Mexico. Scientists examine the growing health concerns related to the fate of hazardous wastes and contaminants introduced into the air, water, and soils of the Borderlands region, as well as pathogens carried by wildlife, domesticated animals, and humans.
Children playing in a makeshift swimming pool at a colonia in Aqua Prieta, Sonora, Mexico. Scientists examine the growing health concerns related to the fate of hazardous wastes and contaminants introduced into the air, water, and soils of the Borderlands region, as well as pathogens carried by wildlife, domesticated animals, and humans.