Science & Technology

This page shows all of the pages at www.epa.gov that are tagged with Science & Technology.

  • Ground Penetrating Radar (GPR)

    Ground Penetrating Radar (GPR) technical description

  • Surface Wave Methods

    A wide variety of seismic waves propagate along the surface of the earth. They are called surface waves because their amplitude decreases exponentially with increasing depth.

  • Electromagnetic Methods: Metal Detectors

    The term "metal detector" (MD) generally refers to some type of electromagnetic induction instrument, although traditional magnetometers are often used to find buried metal.

  • Surface to Borehole Procedures

    There is a progression in both complexity and benefits from check shot and synthetic seismogram to vertical seismic profiles (VSP), three‑component VSP, offset VSP, and extrapolation and description of lithologic parameters into the geologic formations.

  • Logging Techniques and Tools: Flow Logging

    The measurement of flow within and between wells is one of the most useful well-logging methods available to interpret the movement of groundwater and contaminants.

  • Logging Techniques and Tools: Acoustic Logging

    In this section the numerous techniques used in logging are discussed, including hole-to-hole methods.

  • What If One of Your Cars was Electric?

    Thought starter about potential ideas for reducing transportation carbon pollution.

  • Watershed Protection: A Project Focus

    A blueprint for designing and implementing watershed projects including references and case studies for specific elements of the process.

  • 2005 NATA: Assessment Results

    Downloadable data files for the 2005 NATA; state-by-state results

  • Groundwater Level and Well Depth Measurement

    Field branches quality systems and technical prodedures

  • Sediment Sampling

    Field Branches Quality System and Technical Procedures

  • LC50

    Page notes that LC50 (lethal concentration, 50%) model, which estimates LC50 values, has been archived & is no longer available on CEAM site

  • ICE

    Notes that ICE model has been archived & is no longer available on the EPA Center for Exposure Assessment Modeling (CEAM) Web site. CEAM recommends use of the Web-ICE on-line application

  • TMDL USLE

    Notes that the Total Maximum Daily Load (TMDL) Universal Soil Loss Equation (USLE) model has been archived and is no longer available on the CEAM Web site.

  • Map of Weather Stations and State Parts of MLRA - Legend

    Legend for map of weather station locations from EPA database of meteorological data files (for use with CEAM & other software models), overlaid on Major Land Resource Areas.

  • Key to Land Resource Regions (LRR) and Major Land Resource Areas

    Codes to MLRA (Major Land Resource Areas) descriptive titles for use with EPA database of meteorological data files (to use with CEAM & other software models)

  • Weather Bureau Army Navy (WBAN) - Station Notes

    Ancillary information for each of the 237 weather stations in the EPA database of meteorological data files for the period 1961-1990, for use with CEAM & other software models.

  • Map of Weather Stations and State Parts of MLRA

    Map of weather station locations overlaid on Major Land Resource Areas. From EPA database of meteorological data files.

  • EXAMS version 2.98.04.06

    Exposure Analysis Modeling System, software for formulating aquatic ecosystem models & evaluating fate, transport, & exposure concentrations of synthetic organic chemicals. April 2005

  • BASS Release Notes

    Release notes for the BASS software model that simulates the population and bioaccumulation dynamics of age-structured fish communities.

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