Tuscarora Gas Transmission Company

Original Volume No. 1

Effective Date: 12/01/1995, Docket: CP93-685-003, Status: Effective

Original Sheet No. 55 Original Sheet No. 55 : Effective

GENERAL TERMS AND CONDITIONS

10.6 Deviation From Boyle's Law. The deviation of the natural gas from

Boyle's Law shall be determined by the use of the table of formulas

published by the American Gas Association Par Research Project NX-19

corrected for carbon dioxide and nitrogen, or any superseding

applicable tables published by the American Gas Association.

Determinations of the molecular percentage of N2 and C02 in the gas

shall be made within 30 days after commencement of deliveries and at

least quarterly thereafter. The molecular percentage of N2 and C02

thus determined will be used to determine the supercompressibility

factors during the ensuing period, with corrections for specific

gravity, temperature and pressure.

11. MEASURING EQUIPMENT

11.1 Measuring Station. Transporter will install, maintain and operate

at or near the Delivery Point(s), a measuring station properly

equipped with meters, and other necessary measuring equipment by

which the volume of natural gas made available to or on behalf of

Shipper shall be measured and determined in accordance with Section

9 of these General Terms and Conditions.

(a) Orifice Meters. Orifice meters, if used, shall be installed,

and gas quantities computed, in accordance with American National

Standard Bulletin ANSI/API 2530, Orifice Metering Of Natural Gas,

dated June 1979, and any modification and amendments thereof, and

shall include the use of flange connections and straightening vanes.

(b) Diaphragm or Turbine Meters. Diaphragm or turbine meters, if

used, shall be installed, and gas quantities computed, in accordance

with generally accepted industry practices.

computers, if used, shall be installed, and quantities calculated in

accordance with generally accepted industry practices.

(d) New Measurement Techniques. If at any time a new method or

technique is developed with respect to gas measurement or the

determination of the factors used in such gas measurement, such new

method or technique may be substituted upon receipt of Commission

authorization or in accordance with generally accepted industry

practices.