Northwest Pipeline Corporation

First Revised Volume No. 1-A

Effective Date: 01/01/1993, Docket: RP91-166-019, Status: Effective

First Revised Original Sheet No. 406 First Revised Original Sheet No. 406 : Effective

Superseding: Original Sheet No. 406

GENERAL TRANSPORTATION TERMS AND CONDITIONS

(Continued)

3. QUALITY (Continued)

3.3 Determination of Gross Heating Value and Component Analysis

(Continued)

party questions such results within a period of sixty (60) days

following the determination thereof, then such results shall be

deemed conclusive and binding upon the parties hereto. Btu

measuring equipment shall be installed at a location or locations

where the gross heating value of the gas received or delivered

hereunder may be reasonably determined.

3.4 Failure to Meet Specifications. Transporter or Shipper shall

have the right, exercisable by the giving of written or oral notice

to the other party, to require the remedy of any failure to deliver

or redeliver gas in accordance with the quality specifications set

forth in Sections 3.1 and 3.2. In the event gas delivered by either

party fails to conform to such specifications, the receiving party

may refuse to accept all or any portion of such gas.

4. MEASUREMENT OF GAS

4.1 Unit of Volume. The unit of volume for the purpose of

measurement shall be one (1) cubic foot of gas at a base temperature

of 60øF. and at a base pressure of 14.73 p.s.i.a. Such measured

volumes, converted to Mcf, shall be multiplied by their gross

heating value per cubic foot and divided by 1,000 to determine

MMBtu's received and delivered hereunder. The unit of volume for

the purpose of balancing total receipts and deliveries of gas

hereunder shall be one MMBtu.

4.2 Computation of Volume. The volumes of gas measured hereunder

shall be computed in accordance with specifications prescribed by

the American Gas Association, applied in a practical and appropriate

manner. The absolute atmospheric pressure used for volume

calculations shall be the average atmospheric pressure determined by

calculations based on the actual elevation above sea level of the

meter at the place of measurement.