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.