TEXT: AIR OFFICE PROPOSAL TO ASSESS COSTS, BENEFITS OF PM CONTROLS

Since we seem to be stuck on how to address potential costs in the RIA -- let me try out an approach -- based on using benefit/cost data -- that could also help guide us when it comes time for implementation. In 1997 we used $10,000/ton for unknown costs because we believed measures were available for much less than that. OMB disagreed, but said if we were going to use that number we should be willing to incorporate it into...