AMAAPCD RULE 414 SOURCES IMPACTING CLASS I AREAS
LAST REVISED 11/11/11

Rule 414  Sources Impacting Class I Areas.

     A.   The Air Pollution Control Officer shall accept, and
          consider comments offered by the Federal Land Manager
          of any lands contained within a Class I area impacted
          by a proposed major facility or major modification.  If
          the Federal Land Manager demonstrates that the
          emissions from a proposed major facility or major
          modification would have an adverse impact on the air
          quality-related values (including visibility) of any
          federal mandatory Class I areas, notwithstanding that
          the change in air quality resulting from emissions from
          such facility or modification would not cause or
          contribute to concentrations which would exceed the
          maximum allowable increase for a Class I area, and if
          the Air Pollution Control Officer concurs with such
          demonstration, then he shall deny the Authority to
          Construct.

     B.   If the applicant demonstrates, and the affected Federal
          Land Manager of a Class I area concurs, that the
          emissions from a proposed major facility or major
          modification would have no adverse impact on the air
          quality-related values (including visibility) of such
          federal mandatory Class I area, and providing that all
          District Rules and Regulations are otherwise met, the
          Air Pollution Control Officer may issue an Authority to
          Construct with such emission limitations as he may deem
          necessary to assure that emissions of sulfur dioxide
          and particulate matter would not exceed the following
          maximum allowable increases over the baseline
          concentrations:




   Zone Pollutant                           Maximum Allowable Increase
   -------------                           (micrograms per cubic meter)
                                           ----------------------------
      Class I


 Particulate Matter:                                  
   Annual Geometric Mean                              19
   24-hour Maximum                                    37
                                                                           

Sulfur Dioxide:
     Annual Arithmetic Mean                           20
     24-hour Maximum                                  91
     3-hour Maximum                                  325


     
     C.   If the applicant demonstrates, and the Air Resources
          Board, and the affected Class I Federal Land Manager
          concur, that the proposed major facility or major
          modification cannot be constructed in compliance with
          Section B. above as it relates to sulfur dioxide
          increments and that such facility or modification would
          not adversely affect air quality-related values
          (including visibility) of any affected federal
          mandatory Class I area, and provided that the District
          Rules and Regulations are otherwise met, the Air
          Pollution Control Officer may issue an Authority to
          Construct with such emission limitations as he may deem
          necessary to assure that emissions of sulfur dioxide
          would not exceed the following maximum allowable
          increase over the baseline concentration:





   Zone Pollutant                           Maximum Allowable Increase
   --------------                          (micrograms per cubic meter)
                                           ----------------------------
      Class I

  Sulfur Dioxide:
     24-hour Maximum                                    62
     3-hour Maximum                                    221


          The emission limitation contained in the Authority to
          Construct under this Section shall also prohibit the
          exceedance of the maximum allowable increases contained
          in Rule 413 for period of exposure of 24 hours or less
          for more than 18 days, not necessarily consecutive,
          during any annual period.