FEAST Example Result

Example FEAST Result: Methane emissions reductions as a function of survey frequency (y-axis) and technology detection threshold (x-axis). White lines correspond to constant mitigation curves while the underlying color map represents mitigation cost in $/ton CO2eq. The yellow arrows show two different configurations of survey frequency and technology detection threshold that can achieve a 50% reduction in methane emissions (Adapted from: Kemp et al. (2021) Environ. Sci. Technol. 55 9140.)

The figure shows methane emissions reductions that can be achieved by choosing specific combinations of survey frequency (y-axis) and technology (x-axis). For example, to achieve 50% emissions reduction (as shown by yellow arrows), one can choose a semi-annual component-level survey with a technology that has a detection threshold of about 7 kg/d or a quarterly site-level survey with a technology that has a detection threshold of about 70 kg/d. The mitigation cost for the component-level survey is about $15-$30/ton CO2e, while that for the site-level survey is under $15/t CO2e. Thus, higher survey frequency can actually reduce mitigation cost if using the appropriate technology.

FEAST supports the following technologies and can model hybrid LDAR programs:

1. Optical gas imaging (OGI) camera

2. Aerial surveys (both equipment- and site-level surveys)

3. Drone surveys

4. Continuous monitoring systems

5. (To be available 6/22) Satellite-based detection