USGS - science for a changing world

Environmental Health - Toxic Substances

Photo Gallery

Processes Affecting the Natural Attenuation of Fuels in Groundwater (Laurel Bay, South Carolina and Galloway Township, New Jersey)

USGS scientist performing a routine calibration of an instrument used to collect air samples
USGS scientist performing a routine calibration of an instrument used to collect air samples at a gasoline spill site in Galloway Township, New Jersey. The air samples were analyzed for volatile organic compounds (VOCs). Photo credit: USGS.

Concrete lined steam where a MTBE plume discharges
Discharge point of an MTBE plume at Laurel Bay Site, South Carolina, where active biodegradation of MTBE was taking place.

View of nested groundwater monitoring wells
A set of nested monitoring wells used to measure vertical groundwater flow at the Laurel Bay Site, South Carolina. Each of the wells are completed at different depths to give a vertical profile of the concentrations of contaminants in groundwater.

Closeup of a core from a tree sample
Closeup of a core from a tree sample to monitor volatile organic compounds in the subsurface at Laurel Bay Site, South Carolina.

USGS scientists collecting water samples
USGS scientists collecting water samples for analysis of natural-attenuation parameters at the Galloway Site, New Jersey.

vapor sampling
Vapor sampling using a peristaltic pump and gas-tight syringe at the Galloway Site, New Jersey.

Unsaturated-zone well showing 1/4 inch stainless steel vapor probes
Unsaturated-zone well showing 1/4 inch stainless steel vapor probes at the Galloway Site, New Jersey.

Excavated leaking underground storage tank
Excavated leaking underground storage tank (UST) from the Galloway Site, New Jersey.

View of laboratory column experiments
Column experiments quantifying biodegradation of hydrocarbons in the unsaturated zone from the Galloway Site, New Jersey.

Diagram of the transport of petroleum hydrocarbons in groundwater
Conceptualization of the transport of petroleum hydrocarbons in groundwater (Source: Fact Sheet FS-019-98).

  

More Information

Related Photo Gallery

Back to Photo Gallery Index

USGS Home Water Climate Change Science Systems Ecosystems Energy and Minerals Environmental Health Hazards

Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://toxics.usgs.gov/photo_gallery/natatten.html
Page Contact Information:
Page Last Modified: Wednesday, 05-Aug-2015 11:11:50 EDT