In many cases, the largest methane emitters at midstream facilities are from compressors and compressor drivers. Gas processing plants and some gathering compressor stations include additional processing equipment to upgrade gas to pipeline quality, such as dehydrators, acid gas removal units, and associated ares and tanks. Most midstream facilities also include miscellaneous equipment to support pipelines, fuel systems, and similar functions. Finally, storage facilities also include wells and wellhead equipment to store gas in underground reservoirs. This study includes eight transmission compressor stations, ve gathering compressor stations, one gas processing plant, and one underground storage facility.