Data and Tools
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Liquids Unloading
Accumulation of liquids (i.e., water and hydrocarbons) in a mature gas well can slow down gas production. To increase gas production, the liquids must be cleared from the well. Removing the liquids is commonly referred to as “liquids unloading.”
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Pneumatic Controllers
Natural gas-powered pneumatic controllers are used in the natural gas industry to operate valves that control liquid level, pressure, and other processes. Some controllers are designed to bleed continuously, while others may bleed gas only when actuated.
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Pipeline Blowdowns
Pipeline blowdowns are routine operations on transmission and distribution systems to allow operators to safely perform maintenance. This practice involves isolating and depressurizing a section of the pipeline and venting the gas to the atmosphere.
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Reroute Glycol Skimmer Gas
Some glycol dehydrators use condensate separators to recover natural gas liquids and the non-condensable gas (or skimmer gas) is often vented to the atmosphere. Rerouting the skimmer gas to the reboiler firetubes can reduce emissions.
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Route Blowdown Gas to Low Pressure System
Rerouting blowdown gas (from stations, equipment, or pipelines) to an existing low-pressure gas system can reduce the amount of high-pressure natural gas that would otherwise be emitted to the atmosphere.
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Centrifugal Compressors
A centrifugal compressor is used to increase the pressure of natural gas in pipelines. Centrifugal compressors contain rotating shafts that require seals to prevent the high-pressure natural gas from escaping the compressor casing.
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Electronic Reporting Tool (ERT)
This page provides information about how the ERT program, installation, guides, templates and training.
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Summary of Radiological Stormwater Modeling Research
EPA is leading stormwater modeling studies that investigate how to simulate transport of radiological contamination in urban stormwater. Several publications are available to assist with more informed decisions after a radiological disaster.
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Quality Assurance Planning for Region 6
EPA Region 6 Systematic Quality Management and Quality Assurance Project Planning templates, tools, guidance, and information.
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Natural Gamma and Spectral Gamma Borehole Logging
Natural and spectral gamma borehole logging
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AP 42 Section 4.4 Polyester Resin Plastic Products Fabrication - Related Information
AP 42 Section 4.4 Polyester Resin Plastic Products Fabrication - Related Information
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How's My Waterway Updates
rolling how's my waterway app tool updates
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EPA Urban Dynamometer Driving Schedule (UDDS)
The page contains a graph of the EPA Urban Dynamometer Driving Schedule (UDDS).
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EPA US06 or Supplemental Federal Test Procedure (SFTP)
The page contains a graph of the EPA US06 or Supplemental Federal Test Procedure (SFTP) driving cycle.
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LA92 "Unified" Dynamometer Driving Schedule
The page contains a graph of the LA92 “Unified” Dynamometer Driving Schedule.
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Vehicle Weight Classifications for the Emission Standards Reference Guide
This web page shows a chart that categorizes all vehicles by their Gross Vehicle Weight Rating.
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EPA Federal Test Procedure (FTP)
This page contains a graph of the EPA Federal Test Procedure (FTP) driving cycle.
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EPA SC03 Supplemental Federal Test Procedure (SFTP) with Air Conditioning
The page contains a graph of the EPA SC03 Supplemental Federal Test Procedures (SFTP) with air conditioning driving cycle.
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National Air Quality: Status and Trends of Key Air Pollutants
EPA sets national air quality standards for six common air pollutants. Each year EPA tracks the levels of these air pollutants in the air. EPA posts the results of our analyses to this web site.
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Instrument Air Controllers
Natural gas-powered pneumatic controllers can be converted to instrument air-powered pneumatic controllers by substituting the pressurized natural gas with compressed air.