In addition to temporal alignment, estimates need to be adjusted to represent, but not double-count, all emissions from the facility. Adjustments are method-specic. For example, Solution 1's method typically omits emitters below the method's MDL; these need to be added to the Solution 1 estimate. Additionally, quality review indicated that Solution 1 did not consistently detect and quantify methane in compressor driver exhaust (compare SI Figure S-2 versus S-3). An expert panel was utilized to estimate whether Solution 1's estimate included combustion slip (SI Section S-2.2). Results indicated that Solution 1 detected exhaust plumes at 3 of 8 facilities where substantial combustion slip would be expected due to the type and size of compressor drivers on the facility. If Solution 1 did not detect exhaust at a facility, emissions from combustion slip were estimated using recent stack tests, if available, or emission factors if not.