SCOPE
The Parties will mutually agree upon which Party, or its nominee, is to install, own and/or operate/maintain the measurement facilities at each of the Point(s) of Receipt or Delivery under a Transaction. The Party operating, or whose nominee operates/maintains, the measurement facilities at a Point of Receipt or Delivery is referred to herein as the .Metering Party. and the other Party is referred to herein as the .Non-Metering Party.. These specifications may be modified for use as mutually agreed upon for specific purposes or situations as needed as installation, ownership and operational responsibilities are negotiated and defined.

MEASUREMENT DEVICES
All Gas received or delivered under any Transaction will be measured by means of measuring devices of standard type and model as approved by the Parties, which will be operated and maintained by the Metering Party.

1.1 The meters for measurement of volumes of Gas must be installed and operated, and gas measurement computations must be made, in accordance with current industry standards as follows:


1. Ultrasonic metering must be installed and volume determinations performed in accordance with the latest version of A.G.A. Report No. 9.
2. Orifice metering must be installed and volune metering must be installed and volume determinations performed in accordance with the latest version of A.G.A. Report No. 7.be determinations performed in accordance with the latest version of A.G.A. Report No. 3 - ANSI/API 2530.
3. Positive displacement and rotary metering must be installed and volume determinations performed in accordance with the latest version of ANSI B109.1, B109.2, or B109.3.
4. Turbine metering must be installed and volume determinations performed in accordance with the latest version of A.G.A. Report No. 7.
5. Coriolis measurement must be installed and volume determinations performed in accordance with the latest version of A.G.A. Report No. 13.


1.2 Electronic gas measurement using an Electronic Flow Measurement (EFM) device must be performed in accordance with the latest version of API Manual of Petroleum Measurement Standards Chapter 21 - Flow Measurement Using Electronic Metering Systems. (This standard does not apply to electronic correctors of the type used on turbine, rotary, and positive displacement meters)

1.3 Gas chromatographs of standard make and model may be used for determination of the relative density (specific gravity) and the gross heating value of the Gas for use in energy computations by the Electronic Flow Measurement device. Additionally, a gas chromatograph may be used for the determination of gas compositions as they relate to compliance with gas quality specifications.

1.4 If a gas chromatograph has not been installed or is not operating properly, a continuous sampler or spot samples must be used unless other, mutually agreeable, provisions are made by the Parties for the determination of the relative density (specific gravity) and the gross heating value of the Gas. Subsequent fractional laboratory analysis will be determined in accordance with ANSI/ASTM D3588-79 as it is now and from time to time revised, amended or supplemented. Relative density and gross heating values determined will be used in calculating gas deliveries from the date the gas analysis is determined until the date of the next analysis determination.

1.5 Electronic correctors used on Turbine, positive displacement, and rotary meters must provide flowing pressure and temperature for volume determinations in accordance with A.G.A. Report No. 7. Meter pressure and temperature values inputted for volume determinations are to be applied only during periods of flow.

1.6 For the purpose of determining the gross heating value of the Gas, the water vapor content is the actual water vapor content of the Gas as delivered to Buyer, but if the water vapor content is seven pounds per million cubic feet or less, the Gas is deemed to be dry.

TESTING AND CALIBRATION

1.7 Measurement devices and equipment will be periodically inspected, cleaned, tested, calibrated, repaired, and adjusted if necessary for accuracy on a mutually agreeable regular schedule and in accordance with good operating practices. Following any test, any measuring equipment found to be inaccurate at a level exceeding manufacturer.s specifications must be adjusted immediately to measure within such specifications.

1.8 For the purpose of instrument and meter calibration, the atmospheric (barometric) pressure base is assumed, unless otherwise established, to be 14.4 psia irrespective of variations in actual atmospheric pressure from time to time.

1.9 If requested to do so, the Metering Party must give notice to the Non-Metering Party of the time of all tests of the Metering Party.s measurement equipment sufficiently in advance of such tests so that the Non-Metering Party may have a reasonable opportunity for its representatives to be present during such tests; provided, however, that if the Metering Party gives such notice and a representative of the Non-Metering Party is not present at the time specified, then the Metering Party may proceed with the test.

1.10 The Non-Metering Party may have access to the measurement equipment for the purposes of inspection or examination, but the maintenance, calibration, and adjustment of the equipment must be performed only by the employees or agents of the Metering Party. Any inspection or examination by the Non-Metering Party must be done in the presence of the Metering Party

MEASUREMENT CORRECTNESS

1.11 Meter measurements computed by the Metering Party will be deemed to be correct except where the Metering Party.s meter is found to be inaccurate by more than 1%, fast or slow, or to have failed to register, in either of which cases the Metering Party must repair, replace or have the meter replaced. The quantity of Gas delivered while a meter is inaccurate by more than 1% or fails to register will be determined by the readings of the Non-Metering Party.s check meter, if installed, calibrated and in good operating condition. If no check meter has been installed, or one has been installed but it is not calibrated and in good operating condition, such quantity of Gas will be determined by correcting the error in the Metering Party.s meter by the percentage of the error if it is ascertainable by calibration or mathematical calculation. If not so ascertainable, then such quantity of Gas will be determined by estimating the quantity on the basis of deliveries under similar conditions when the meter was registering accurately. Unless other data would indicate otherwise to which the Parties mutually agree, such adjustment or correction will be made only for ½ of the period that has elapsed since the previous test; however, no such adjustment or correction will exceed a time period of 90 days..

MEASUREMENT COMPUTATIONS

1.12 The unit of volume measurement is one cubic foot at a pressure base of 14.65 psia and at a temperature base of 60 degrees Fahrenheit. Meter measurements will be computed by the Metering Party into such units in accordance with the Ideal Gas Laws for volume variations due to metered pressure and corrected for deviation using average values of recorded relative density (specific gravity) and flowing temperature, or by using the calculated relative density determined by the methods detailed in 1.3 and 1.4 above.

1.13 In measurement computations, the determinations for the average values for meter pressure, relative density, and flowing temperature will be applied only during periods when Gas is actually flowing through the respective meter(s).

1.14 All Measurement volumes will be corrected for super-compressibility and deviation from the Ideal Gas Laws, as determined by use of tables or formulas published by the A.G.A. [A.G.A. 8 Detailed, A.G.A.-Gross or NX-19], as amended, revised or supplemented from time to time.

RECORDS

1.15 Records from all measurement equipment are the property of the Metering Party who must keep all such records on file for a period of not less than two years.

1.16 Upon request, the Metering Party must make available, in a reasonable time and manner, to the Non-Metering Party copies of volume records and other related measurement data from the measurement equipment, together with calculations there from, for inspection and verification, subject to return within 30 days after receipt thereof.

CHECK MEASUREMENT

1.17 The Non-Metering Party may, at its option and expense, install and operate meters, instruments, and other equipment to verify the accuracy of the Metering Party.s measurement equipment, but such equipment must not interfere with the operation of the Metering Party.s measuring equipment. The Metering party will have the sole responsibility for the determination of what constitutes a metering interference. The check equipment installed by the Non-Metering Party, if any, is subject at all reasonable times to inspection or examination by the Metering Party, but the calibration and adjustment thereof may be performed only by employees or agents of the Non-Metering Party. Notwithstanding the Non-Metering Party.s right to install its own check equipment, the measurement of the Gas for the purposes of custody transfer will be performed only by the Metering Party.s measuring equipment.

GAS QUALITY
Gas quality for receipt or delivery will be according to Atmos Quality Specification.

DEFINITIONS
Receipt -- A volume or energy quantity received into an Atmos pipeline (Gas-in), examples are production; transportation for industrials or third-party pipelines; purchase from third-party, etc.

Delivery -- A volume or energy quantity delivered out of an Atmos pipeline (Gas-out), examples are residential, commercial and industrial sales, power generation transportation; industrial transportation, etc.

Metering Party -- The Party operating and maintaining, or whose nominee operates or maintains, the custody transfer measurement facilities at a Point of Receipt or Delivery.

Non-Metering Party -- The Party who may, or may not, install or own the custody transfer measurement facilities but who does not operate or maintain them.

Gas -- Natural Gas produced from Gas wells, vaporized natural Gas liquids, Gas produced in association with oil (casinghead Gas) and/or the residue Gas resulting from processing casinghead Gas and/or Gas well Gas.

Gross Heating Value -- The total heating value of the Gas, expressed in Btu per cubic foot, determined at a temperature of sixty (60) degrees Fahrenheit, saturated with water vapor and under a pressure equivalent to that of thirty (30) inches of mercury at thirty-two (32) degrees Fahrenheit, converted to base conditions of sixty (60) degrees Fahrenheit and an absolute pressure of fourteen and sixty-five one hundredths (14.65) pounds per square inch and adjusted to reflect actual water vapor content.