Gas Transmission Northwest Corp.

Third Revised Volume No. 1-A

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Effective Date: 10/06/2003, Docket: RP04- 23-000, Status: Effective

Original Sheet No. 113 Original Sheet No. 113 : Effective

TRANSPORTATION GENERAL TERMS AND CONDITIONS

(Continued)

4. MEASURING EQUIPMENT (Continued)

4.3 Correction and Adjustment: If at any time any of the

measuring equipment is registering inaccurately by an amount

exceeding two percent (2%) at a reading corresponding to

the average hourly rate of flow, the previous readings of

such equipment shall be corrected to zero error for any

period definitely known or agreed upon, or if not so known

or agreed upon, the lesser of one-half (1/2) of the elapsed

time since the last test or six months from the production

month with a three-month rebuttal period, provided, however,

that this limitation shall not apply in the case of a

deliberate omission or misrepresentation or mutual mistake of

fact. The parties' other statutory or contractual rights

shall not otherwise be diminished by this limitation. If the

measuring equipment is out-of-service, the volume of gas

delivered during such period shall be determined:

(a) By using the data recorded by any check measuring

equipment accurately registering; or

(b) If such check measuring equipment is not registering

accurately but the percentage of error is

ascertainable by a calibration test, by using the

data recorded, corrected to zero error; or

(c) If neither of the methods provided in (a) and (b)

above can be used, by estimating the quantity

delivered, by reference to deliveries under similar

conditions during a period when the equipment was

registering accurately.

No correction shall be made in the recorded volumes

of gas delivered hereunder for measuring equipment

inaccuracies of two percent (2%) or less, and in no

event shall inaccuracies less than 25 Mcf be

considered for adjustment.

(Continued)