High Island Offshore System, L.L.C.
Third Revised Volume No. 1
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Effective Date: 04/07/1999, Docket: GT99- 17-000, Status: Effective
Original Sheet No. 78 Original Sheet No. 78 : Effective
GENERAL TERMS AND CONDITIONS
3.1 Unit of Measurement and Metering Base. The volumetric
measurement base shall be one cubic foot of Gas at a
pressure base of 14.73 pounds per square inch absolute, and
a temperature base of 60 degrees Fahrenheit (on a dry
3.2 The unit of gas received and delivered by Transporter shall
be 1 Dth. The number of Dth shall be determined by
multiplying the number of standard cubic feet of gas
measured on the measurement basis described in this
section, by the total Heating Value of such gas in Btu per
standard cubic foot as defined in Section 4.2 below, and by
dividing the product by 1 million (1,000,000). For
reporting purposes, Btu conversion factors should be
reported to not less than 3 decimal places and Pressure Base
conversion factors should be reported to not less than 6
decimal places. For calculation purposes, not less than 6
decimal places should be used for both conversion factors.
3.3 Atmospheric Pressure. The average absolute atmospheric
(barometric) pressure shall be assumed to be 14.73 pounds
per square inch, irrespective of actual elevation or
location of the points of measurement above sea level or
variations in actual barometric pressure from time to time.
3.4 Temperature. The temperature of the Gas shall be determined
at each point of measurement by means of a properly
installed recording thermometer or temperature transmitter
of standard manufacture acceptable to both parties.
3.5 Specific Gravity. The specific gravity of the Gas shall be
determined at each point of measurement by continuous
sampler or other methods mutually agreeable to both parties.
3.6 Supercompressibility. The supercompressibility of the Gas
(deviation from the laws for ideal gases) shall be
determined by one of the following methods: