Texas Natural Resource Conservation Commission
                Austin                       Texas
                            Memorandum

To:  New Source Review (NSR) Division Directors/NSR Engineers
From:  Lawrence E. Pewitt, P.E., Director, New Source Review
         Program
Date:  March 26, 1990
Subject:  Time Limits for Amendments

Each permit that is issued has time limits for beginning
construction and completion of construction.  In order to
provide consistency for changes authorized under amendments,
those time frames have been included in the permit/special
permit amendment letters.

This has been done so that we can have some assurance that
these projects are completed in a reasonable time and our
emission data base will be reasonably accurate.

cc:  Mr. Steve Spaw, Executive Director
     Mr. James C. Myers, Deputy Director, Regulatory
       Operations
     Regional Directors