Why is CO reduction being used as the standard for emissions reduction for RICE NESHAP?
Because it is difficult to measure all HAPs, CO has been shown to be an appropriate “surrogate” for HAPs emissions. This means that there is a relationship between CO emission reductions and HAP emissions reductions from compression ignition stationary engines. Therefore, if CO emissions are reduced, other HAPs emissions will be reduced. It is also much easier to test for CO reduction rather than HAPs reduction. CO is not a HAPs.
