Section Env-A 1409.01 - Determination of 24-Hour Ambient Air Limits(a) Where a reference concentration limit has been established by the EPA for an RTAP, the 24-hour AAL for that pollutant shall be the reference concentration limit if: (1) The RTAP causes developmental or reproductive effects; or(2) The annual AAL is based on the reference concentration limit, and the 24-hour AAL, as calculated in accordance with (b), below, is less than the reference concentration limit.(b) In all cases other than those specified in (a), above, the 24-hour AAL shall be a modified occupational health standard as determined by the calculation specified in Env-A 1409.02.N.H. Code Admin. R. Env-A 1409.01
#6328, INTERIM, eff 8-24-96, EXPIRED: 12-22-96
New. #6468-B, eff 3-5-97; ss and moved by #8278, eff 2-4-05 (from Env-A 1410.01); ss by #9601, eff 11-25-09
Amended by Volume XXXVIII Number 02, Filed January 11, 2018, Proposed by #12443, Effective 1/5/2018, Expires 1/5/2028.Amended by Volume XLII Number 6, Filed February 10, 2022, Proposed by #13334, Effective 2/3/2022, Expires 2/3/2032.