Figure 5.

Number of hours required by LDAR programs normalized by the hours required by OGI 4× vs their emission reduction for (a) base case (long duration of high-emitters) and (b) sensitivity analysis S3 (short duration of high-emitters) simulations. The data points are colored by LDAR category: “A” = OGI, “B” = aerial + OGI, “C” = satellite + aerial + OGI, “D” = satellite + OGI, “E” = continuous + OGI, “F” = satellite + continuous + OGI, “G” = satellite + continuous at priority sites + OGI, and “H” = satellite + continuous at priority sites + aerial at non-priority sites + OGI. Horizontal black lines indicate the number of visits of OGI-only LDAR programs. The vertical black line indicates the reduction of OGI 4×. Each data point corresponds to one scenario in a particular LDAR category, with differences in detection threshold, frequency of inspections, and repair times.