Cheyenne Plains Gas Pipeline Company, L.L.C.

Original Volume No. 1

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Effective Date: 12/01/2004, Docket: CP03-302-004, Status: Effective

Original Sheet No. 214 Original Sheet No. 214 : Effective





2. MEASUREMENT (Continued)


2.5 Atmospheric Pressure. For the purpose of measurement, calculation

and meter calibration, the average absolute atmospheric

(barometric) pressure shall be based on the actual altitude of each

point of measurement irrespective of variations in natural

atmospheric pressure from time to time.


2.6 Temperature. The temperature of the gas shall be determined at the

points of measurement by means of a properly installed temperature

transmitter of standard manufacture determined by Transporter in

exercise of its reasonable judgment to be installed in accordance

with the recommendations contained in ANSI/API 2530 First Edition

(Orifice Metering of Natural Gas). The arithmetic average of

Hourly temperatures for each Day shall be used in computing

temperatures of the gas during such Day. In the event electronic

computer measurement is used, average daily temperature will be

computed as a running average of data determined during each

computer scan.


2.7 Determination of Heating Value and Specific Gravity. The Gross

Heating Value and specific gravity of the gas may be determined by

gas chromatographic analysis. This shall be done by either a gas

sample or by an on-line gas chromatograph. In the event a

continuous Gas sampling device is used, intervals mutually agreed

upon should not be less than every Month. The determination of

Gross Heating Value and specific gravity from chromatograph shall

input continuously into the computer for quantity calculations. In

the event a continuous gas sampler is installed, then the Gross

Heating Value and specific gravity shall be determined in the

laboratory by chromatograph. Such determinations shall be

considered as the Gross Heating Value and specific gravity of all

gas delivered during the applicable period of sampling. All Gross

Heating Value and specific gravity determinations made with a

chromatograph shall use physical gas constants for gas compounds, as

outlined in ANSI/API 2530 with any subsequent amendments or

revisions to which the Parties may mutually agree.


2.8 Supercompressibility. The measurement hereunder shall be corrected

for deviation from Boyle's law in accordance with AGA Report No. 8.