Table 2. Parameters Varied in Sensitivity Analyses and Base Case Simulations.
set of simulations | close-range inspection data sets, which are then combined with the flyover data set | fraction of sites with emissions from close-range inspections when combining close-range and flyover data sets at each Monte Carlo iteration | pLeaka | MTBF [days]a | MTTR [days]a |
---|---|---|---|---|---|
base case | Allen et al.,7 Bell et al.,22 Kuo et al.,23 and Pacsi et al.24b | 0.71 | tanks = 0.046; flares = 0.1 | tanks = 1515; flares = 1435 | tanks = 73; flares = 159 |
sensitivity analysis S0 | Allen et al.,7 Bell et al.,22 Kuo et al.,23 Pacsi et al.,24 ERG,28 and Ravikumar et al.29c | 0.71 | tanks = 0.046; flares = 0.1 | anks = 1515; flares = 1435 | tanks = 73; flares = 159 |
sensitivity analysis S1 | Allen et al.,7 Bell et al.,22 Kuo et al.,23 and Pacsi et al.24b | 0.91 | tanks = 0.046; flares = 0.1 | anks = 1515; flares = 1435 | tanks = 73; flares = 159 |
sensitivity analysis S2 | Allen et al.,7 Bell et al.,22 Kuo et al.,23 and Pacsi et al.24b | 0.51 | tanks = 0.046; flares = 0.1 | anks = 1515; flares = 1435 | tanks = 73; flares = 159 |
sensitivity analysis S3 | Allen et al.,7 Bell et al.,22 Kuo et al.,23 and Pacsi et al.24b | 0.71 | tanks = 0.046; flares = 0.1 | tanks = 103.7; flares = 45 | tanks & flares = 5 |
sensitivity analysis S4 | Allen et al.,7 Bell et al.,22 Kuo et al.,23 and Pacsi et al.24b | 0.71 | tanks = 0.046; flares = 0.1 | tanks = 207.4; flares = 90 | tanks & flares = 10 |
sensitivity analysis S5 | Allen et al.,7 Bell et al.,22 Kuo et al.,23 and Pacsi et al.24b | 0.71 | tanks = 0.046; flares = 0.1 | tanks = 622.2; flares = 270 | tanks & flares = 30 |
All sets of simulations use the pLeak, MTBF, and MTTR parameters specified in Table 1 for: valves, connectors, open ended lines, pressure relief valves, flanges, and other components.
Emissions assigned based on equipment type from measurements for all sources.
Emissions assigned independently of equipment type from measurements except for tanks and flares.