Northwest Pipeline Corporation
First Revised Volume No. 1-A
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Effective Date: 11/25/1990, Docket: GT91- 5-000, Status: Effective
Original Sheet No. 405 Original Sheet No. 405 : Effective
GENERAL TRANSPORTATION TERMS AND CONDITIONS
3. QUALITY (Continued)
3.1 Gas Quality at Receipt Points (Continued).
(f) Oxygen: The gas shall not contain in excess of two-tenths of
one percent by volume of oxygen, and the parties agree to exercise
every reasonable effort to keep the gas completely free of oxygen.
(g) Temperature: The temperature of the gas at the point of
delivery shall not exceed one hundred twenty degrees Fahrenheit.
(h) Water: The gas delivered shall be free from liquid water and
shall not contain more than seven pounds of water in vapor phase
per million cubic feet.
(i) Mercury: The gas shall be free from any detectable mercury.
3.2 Gas Quality at Delivery Point(s). The gas delivered by Transporter
to Shipper at the Delivery Point shall be natural gas containing a gross
heating value of at least 985 Btu's. Such gas shall be commercially free
of dust, gums, dirt, impurities and other solid matter and shall not
contain more than one-quarter grain hydrogen sulfide per one hundred
cubic feet as determined by using commercially available on-line analyses
and/or such analytical methods that are generally accepted in industry
practice provided that Transporter may install and utilize a recording
hydrogen sulfide analyzer to monitor the gas at points at which it deems
such continuous monitoring to be desirable. The gas to be delivered
shall not contain more than twenty grains of total sulfur per one hundred
The gas shall be free of water and hydrocarbons in liquid form at
the temperature and pressure at which the gas is delivered and in no
event shall have a water content in excess of seven pounds per one
million cubic feet.
3.3 Determination of Gross Heating Value and Component Analysis. The
party operating the measurement equipment shall determine the gross
heating value of the gas delivered and its component analysis at
reasonable intervals. Such determination shall be made using either an
on-line chromatograph or by chromatographic analysis of a representative
sample of gas taken with a continuous sampler. Transporter may at its
option allow the use of spot samples. If at any time and for any reason
Shipper or Transporter should question the results of any spot sampling,
a redetermination shall be made and the redetermination mutually
acceptable to the parties shall be used; provided, however, if neither