GENERAL TERMS AND CONDITIONS
                                  (Continued)
   
                  (c)   by estimating the quantity of receipt or delivery
                        based on receipts or deliveries during preceding
                        periods under similar conditions when the meter
                        was registering accurately.
   
            6.5   If at any time during the term hereof, a new method or
                  technique is developed with respect to Gas measurement
                  or the determination of the factors used in such Gas
                  measurement, such new method or technique may be
                  substituted upon mutual agreement thereto by both
                  parties.
   
            6.6   The parties agree to preserve for a period of at least
                  three (3) years or such longer period as may be
                  required by public authority, all test data, charts, if
                  any, and other similar records.
   
            6.7   In accordance with the provisions of Sections 6.3 and
                  6.4, above, Seller will use the best information
                  available to close its allocation of quantities for a
                  service Month. For the purposes of Sections 6.3 and
                  6.4, above, "close" shall mean five (5) Business Days
                  after the applicable service Month. To the extent that
                  adjustments are made after the date of such close, such
                  adjustments ("Prior Period Adjustments" or "PPA") shall
                  be treated under this Section 6.7. If the PPA are due
                  to the correction of measurement data or reallocation
                  of volumes, such adjustments should be processed within
                  six (6) Months of the applicable service Month.  If the
                  affected party disputes the as-adjusted quantity it is
                  entitled to rebut the basis for the PPA, but only if it
                  does so within three (3) Months of the processing of
                  the as-adjusted quantity.  Notwithstanding the above
                  specified deadlines for processing/rebutting PPA, such
                  deadlines shall not apply in the case of deliberate
                  omission or misrepresentation or mutual mistake or
                  fact.  Parties' other statutory or contractual rights
                  shall not be diminished by this standard.