Tuscarora Gas Transmission Company

First Revised Volume No. 1

Effective Date: 07/01/2009, Docket: RP09-8-002, Status: Effective

Substitute Original Sheet No. 106 Substitute Original Sheet No. 106

Superseding: Original Sheet No. 106

GENERAL TERMS AND CONDITIONS

10. Measurement (continued)

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.

Installation: Unless Transporter and Shippers agree otherwise, all gas

volume measuring equipment, devices and materials at the point(s) of

receipt and/or delivery shall be furnished and installed by Transporter

at Shipper's expense including the tax-on-tax effect. All such

equipment, devices and materials shall be owned, maintained and

operated by Transporter.

(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.