Texas Gas Transmission, LLC

Third Revised Volume No. 1

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Effective Date: 09/15/2008, Docket: RP08-392-000, Status: Effective

Original Sheet No. 1600 Original Sheet No. 1600 GENERAL TERMS AND CONDITIONS Section 44. Measurement Procedures and Equipment 4.1 General Transporter and Customer must mutually agree to all matters pertaining to measurement practices, procedures, equipment and installations, not specifically covered herein. Instrumentation required to determine gas volumes, mass, and MMBtu will either be a combination of mechanical, electro/mechanical, pneumatic mechanical, electro/pneumatic/mechanical, or electronic at the option of the Transporter. The accumulated data will be recorded on charts or stored in electronic flow computers. 4.2 Unit of Gas The unit of gas received and delivered by Transporter shall be 1 MMBtu. The number of MMBtu shall be determined by multiplying the number of standard cubic feet of gas, measured on the measurement basis hereinafter specified, by the total heating value of such gas in Btu per standard cubic foot as defined in Section 4.3 below, and by dividing the product by 1 million (1,000,000). 4.3 Determination of Volume and Unit Total Heating Value The volume and unit total heating value of gas shall be determined by the party performing measurement at point(s) of transfer using the following: (a) The unit weight for the purpose of measurement shall be one (1) pound mass of gas; (b) For deliveries or receipts hereunder the average absolute atmospheric (barometric) pressure shall be assumed to be fourteen and seven-tenths (14.7) pounds per square inch for gas delivered south of 32 degrees Latitude, American Continent, and fourteen and four-tenths (14.4) pounds per square inch for gas delivered north of 32 degrees Latitude, American Continent; (c) The average unit total heating value of the gas shall, at Transporter's option, be determined at each point of measurement by: (1) use of a spot sample taken during each month to be analyzed on a gas chromatograph, (2) use of a sample taken by a continuous sampler to be analyzed on a gas chromatograph, or (3) use of an on-line gas chromatograph. If chromatographic analysis is used, the unit total heating value shall be calculated using the compound values contained in the American Gas Association Gas Measurement Committee Report No. 3. September, 1985 (ANSI/API 2530 approval May, 1985), or any revision.