310 Mass. Reg. 6.01
Ambient Air means that portion of the atmosphere, external to buildings, to which the general public has access.
Department means the Department of Environmental Protection.
Equivalent Method means a method of sampling and analyzing the ambient air for an air pollutant that has been designated as an equivalent method in accordance with 40 CFR Part 53; it does not include a method for which an equivalent method designation has been canceled in accordance with 40 CFR Part 53.11 or 53.16.
Reference Method means a method of sampling and analyzing the ambient air for an air pollutant that is specified as a reference method in an appendix to 40 CFR Part 50, or a method that has been designated as a reference method in accordance with 40 CFR Part 53; it does not include a method for which a reference method designation has been cancelled in accordance with 40 CFR Part 53.11 or 53.16.
310 CMR 6.01