The three CMS solutions studied here are point sensor networks, a class of CMS that leverages multiple fixed-in-space sensors (typically 4-8 per site) that measure methane concentrations in near real time. The sensors are typically arranged around the perimeter of the oil and gas site. A schematic of each site showing the location of the CMS sensors and potential emission sources is shown in Figure . This study evaluates the real-life deploy-Table : CMS deployment across the six oil and gas sites. The names of the CMS solutions and the oil and gas sites have been anonymized.