The CO2e Economic Analysis Tool (CEAT) is a spreadsheet-based application for comparing project alternatives that are sensitive to GHG emission rates, emission levies, or other financial parameters. The tool is applicable to hydrocarbon…
Previous project reports and a white paper provided background and analysis of pipeline blowdown data reported to under under Subpart W of the GHG Reporting Program. Pipeline blowdown data reported for the 2018 calendar year released by EPA in late…
The CO2e Economic Analysis Tool (CEAT) is a spreadsheet-based application for comparing project alternatives that are sensitive to GHG emission rates, emission levies or other financial parameters. The tool is applicable to hydrocarbon transportation…
The overall objective of this project is to develop a standard method for validating methane emission quantification technologies. This validation process is intended to be used to assess any technology that claims to quantify methane emissions…
PRCI reports have summarized GHGRP data and improved emissions factors based on the data. Pipeline blowdown emissions reporting was added to the GHGRP in 2016 and only one year of quality data (2017 reporting year) was available for the PRCI reports…
A review of over 1000 unit isolation valves and corresponding Subpart W GHG vent emissions measurements revealed that 94 "large" (>500 scfh) leaks were measured at these units from 2012 to 2018. Of these, ~60% of the measured volume of gas releases…
This white paper provides a step-by-step review of the methodology and data sources for development of compressor methane emission factors (EFs), and develops updated EFs based on Subpart W compressor measurement and leak survey data. The…
A 2018 PRCI report evaluated related emissions from compressor seals, isolation valves, and blowdown valves based on direct measurements required by Subpart W of the GHG Reporting Program. This report presents the methane emissions data from 2011 -…
The U.S. EPA Greenhouse Gas (GHG) Reporting Program (GHGRP) requires compressor stations and underground storage facilities to measure compressor vent, rod packing, and seal emissions for facilities subject to 40 CFR, Part 98, Subpart W. The…
At natural gas pipeline compressor stations, methane emissions from compressor and engine crankcases are often vented directly into the atmosphere. There may be advantages to capturing these emissions and using them to offset fuel usage and / or…