Solution 1 states a method detection limit (MDL) of 3 kg/h with 90% probability of detection, but this varies with wind speed. In a typical deployment, Solution 2 estimates emissions from individual "zones" or equipment groups, which would then be summed to create a whole-facility estimate; this method was utilized for the baseline deployment. For the EOP estimates, Solution 2 was instructed to make more comprehensive whole-facility surveyscapturing all facility emissionsrather than summing individual zones. In some cases, the meteorological conditions and/or the footprint of the enrolled facility prevented Solution 2 from estimating the entire facility with one ux plane. It was left to the discretion of the Solution 2 eld team whether they could y a whole-facility estimate in one ux plane ight, or if multiple ights (all downwind of the facility) were needed to capture the entire facility. Therefore, at some facilities (SI Section S-2), a single Solution 2 whole-facility estimate may include multiple ux plane ights.