Science & Technology
-
Porosity
Porosity, saturation, and density are related as a function of porosity Φ.
-
Seismic Reflectivity
Reflections in seismic data result from contrasts in the seismic impedance (ρV) across a boundary
-
Magnetic Susceptibility
Magnetic susceptibility is a measure of the ability of a material to be magnetized.
-
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.
-
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.
-
Electrical Methods
Electrical geophysical prospecting methods detect the surface effects produced by electric current flow in the ground.
-
Surface Geophysical Methods
This section covers most of the commonly used surface geophysical methods.
-
Completed WRAP Action Summaries
Summaries of completed WRAP actions.
-
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.
-
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or public website: https://sor-scc-api.epa.gov/sccwebservices/sccsearch/ Filter on “last inventory year” to remove SCCs no longer active.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…
-
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.
-
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
-
Competency and Proficiency Testing
Field Branches Quality System and Technical Procedures
-
Design and Installation of Monitoring Wells
Design and Installation of Monitoring Wells
-
Previous AP-42 Versions, Supplements and Updates
AP-42, Compilation of Air Pollutant Emission Factors Volume I, Stationary Point and Area Sources. This page links to older versions of Volume I and is available for historic purposes.
-
2016 Version 3 Technical Support Document
This TSD describes how the emission inventories were prepared for air quality modeling by the U.S. Environmental Protection Agency (EPA) for criteria air pollutants to represent the years of 2016, 2023 and 2028.
-
Draft Risk Evaluation for Butyl Benzyl Phthalate (1,2-Benzene- dicarboxylic acid, 1- butyl 2(phenylmethyl) ester) (BBP)
EPA designated o-dichlorobenzene as a high priority chemical in December 2019 and the chemical is currently undergoing risk evaluation.
-
Draft Risk Evaluation for Diisobutyl Phthalate (1,2-Benzene- dicarboxylic acid, 1,2- bis-(2methylpropyl) ester) (DIBP)
EPA designated di-isobutyl phthalate - (1,2-Benzene- dicarboxylic acid, 1,2- bis-(2methylpropyl) ester) as a high priority chemical in December 2019 and the chemical is currently undergoing risk evaluation.
-
Draft Risk Evaluation for Dibutyl Phthalate (1,2-Benzene- dicarboxylic acid, 1,2- dibutyl ester) (DBP)
EPA designated dibutyl phthalate (1,2-Benzene- dicarboxylic acid, 1,2- dibutyl ester) as a high priority chemical in December 2019 and the chemical is currently undergoing risk evaluation.
-
Draft Risk Evaluation for Di-ethylhexyl phthalate - (1,2-Benzene- dicarboxylic acid, 1,2- bis(2-ethylhexyl) ester) (DEHP)
EPA designated di-ethylhexyl phthalate - (1,2-Benzene- dicarboxylic acid, 1,2- bis(2-ethylhexyl) ester) as a high priority chemical in December 2019 and the chemical is currently undergoing risk evaluation.