Part 53-58 Request for Comment Summary

List of Requests for Comment in EPA’s proposed rule, “Revisions to Ambient Air Monitoring Regulations,” 71 Federal Register 2710-2808 (January 17, 2006) [PDF refers to page number in Monitoring NPRM file from p. 1 to p. 100] Proposed Monitoring Requirements for the Proposed Primary National Ambient Air Quality Standard for PM 10-2.5 PM Monitoring in Lieu of PM 10 10-2.5• (71 FR 2732, PDF 24) Consideration of whether a State should be allowed to operate an appropriately sited PM monitor in lieu of a required PM monitor in a situation in which 10 10-2.5the probability of a PM NAAQS violation is small. We invite comment on this subject, 10-2.5including other possible provisions for more limited use of PM10 monitors in lieu of PM 10-2.5monitors, such as limiting the use of PM10 monitors to a period of 3 years after the first approval of a continuous FEM PM method. 10-2.5 PM Minimum Monitoring Requirements 10-2.5• (71 FR 2733, PDF 25) We invite comment on whether there should be a different minimum size for an MSA required to have monitors, rather than applying the criteria in Table 1 of this preamble to all MSA that contain all or part of an urbanized area with a population of at least 100,000 persons. We also invite comment on whether factors in addition to MSA population and estimated design value should enter into the determination of the number of required monitors, for example, MSA or urbanized area(s) population density, and if so, in what way. ...