Centerpoint Energy Gas Transmission Company

Sixth Revised Volume No. 1

Effective Date: 05/01/2010, Docket: RP10-567-000, Status: Effective

First Revised Sheet No. 334 First Revised Sheet No. 334

Superseding: Original Sheet No. 334

GENERAL TERMS AND CONDITIONS

(continued)

2. MEASUREMENT (continued)

applicable Rate Schedules in this Tariff shall be determined as

follows:

(a) For the purpose of measurement and meter calibration, the

average absolute atmospheric pressure for each Point of

Receipt and Delivery shall be based on the actual elevation

or location of the meter at the Point of Receipt or Delivery

above sea level.

(b) The temperature of the Gas passing through the meters shall,

when reasonably deemed necessary for computing Gas

quantities, be determined for any Day by the continuous use

of a recording thermometer or its equivalent so installed

that it may properly record the temperature of the Gas

flowing through the meters. The arithmetic average of the

temperature recorded each Day shall be used in computing Gas

quantity, or, if not inconsistent with Transporter's

operations, instantaneous temperature measurements may be

applied to metering instruments for quantity computation.

shall, when reasonably deemed necessary for computing Gas

quantities, be determined for any one Day by the use of a

gravitometer recording continuously, unless otherwise

agreed. The arithmetic average of the specific gravity of

the Gas or, if not inconsistent with Transporter's

operations, continuous instantaneous specific gravity

measurement, may be applied to metering instruments to

provide the quantity computation. Otherwise, the specific

gravity of the Gas shall be determined by approved methods

not inconsistent with Transporter's operations with such

reasonable frequency as is found expedient in practice.

(d) The deviation of the Gas from Ideal Gas Laws shall be

calculated according to the recommendations of the AGA

Measurement Committee