Science & Technology
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EPA QA/R-5, EPA Requirements for Quality Assurance Project Plans
Outlines requirements for QA plans for organizations that conduct environmental data operations for EPA through contracts, financial assistance agreements, and interagency agreements.
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Single-Point Resistance Borehole Logging
single point resistance borehole logging
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Electromagnetic Signal Attenuation (Skin Depth)
electromagnetic signal attenuation and skin depth
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Electromagnetic Properties of Matter
the three electromagnetic properties of matter
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Dielectric Permittivity
dielectric constant geophysical property
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Borehole Optical Televiewer (OTV)
Borehole Optical Televiewer
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Borehole Acoustic Televiewer (ATV)
Borehole Acoustic Televiewer
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Seismic Velocities
If the ground is stressed by an explosion or a hammer blow, it generates three fundamental types of elastic waves: P (primary, push-pull) waves; S (secondary, shear) waves, and surface waves.
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Porosity
Porosity, saturation, and density are related as a function of porosity Φ.
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Seismic Reflectivity
Reflections in seismic data result from contrasts in the seismic impedance (ρV) across a boundary
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Magnetic Susceptibility
Magnetic susceptibility is a measure of the ability of a material to be magnetized.
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Density
Density, s, is the intrinsic unit mass of a material, defined as the mass of one cubic meter with units of kilograms per cubic meter.
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Geophysical Properties
To develop a thorough understanding of the theory and science of geophysical methods requires an understanding of the geophysical properties involved in the methodology.
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Electrical Methods
Electrical geophysical prospecting methods detect the surface effects produced by electric current flow in the ground.
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Surface Geophysical Methods
This section covers most of the commonly used surface geophysical methods.
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Completed WRAP Action Summaries
Summaries of completed WRAP actions.
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Lead Exposure Associated with Renovation and Remodeling Activities Final Summary Report, EPA 747-S-00-001, January 2000
Presents a summary of a four-phase study lead exposure in workers and building occupants associated with renovation and remodeling activities.
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How do I determine what SCCs have changed between inventory years?
These are available in the EIS (Reporting Code table) or public website: https://sor-scc-api.epa.gov/sccwebservices/sccsearch/ Filter on “last inventory year” to remove SCCs no longer active. If this column has a date in it, then the SCC has been retired as of that date. The “last updated date” (column J) indicates when…
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Data from the National Aquatic Resource Surveys
The following data are available for download as text (.txt) files. Each .txt data file has a companion metadata file (.txt) that lists the field labels and descriptions for each variable.
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Materials that support application of the final Regional SDAMs
Supporting materials for the application of the Regional SDAMs include the user manuals, field forms, shapefiles, web application code, training materials, field equipment as well as reference and background materials