Hi Larry,

Per our conversation today, I want to make sure I understand your intent
for the transition periods for Klagetoh and Leupp.  Below are two
conditions from the draft Klagetoh permit.  We would use the same approach
for Leupp.  Please let me know whether we have understood your intent
correctly.  Note that there will also be some associated recordkeeping
requirements.

Roger Kohn
U.S. EPA Region 9
75 Hawthorne St., Mail Code AIR-3
San Francisco, CA  94105
phone: (415) 744-1238
fax:   (415) 744-1076

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From the draft Klagetoh permit:

The following conditions apply during the transition period.  The
transition period is defined as the six month period that starts on the
first day that Emission Unit 404 (GE gas turbine) or Emission Units  423 or
424 (Catepillar generator engines) operates.

     1.        During the transition period, Emission Units 401, 402, and
          403 (Clark compressor engines) shall not operate simultaneously
          with Emission Unit 404 (GE gas turbine). [40 CFR
          71.6(a)(13)(iii), 71.6(b), 71.7(e)(1)(i)(A)(4)(i)]

     2.        During the transition period, either Emission Unit 421 or
          422 (Waukesha generator engines) may operate simultaneously with
          either Emission Unit 423 or 424 (Catepillar generator engines).
          Under no circumstances may Emission Unit 421 operate
          simultaneously with Emission Unit 422, nor may Emission Unit 423
          operate simultaneously with Emission Unit 424. [40 CFR
          71.6(a)(13)(iii), 71.6(b), 71.7(e)(1)(i)(A)(4)(i)]