Iroquois Gas Transmission System, L.P.

FIRST REVISED VOLUME NO. 1

Effective Date: 05/15/2003, Docket: RP03-326-000, Status: Effective

First Revised Sheet No. 72 First Revised Sheet No. 72 : Effective

Superseding: Original Sheet No. 72

published by the American Gas Association. Determinations of

the molecular percentage of N2 and CO2 in the gas shall be made

within thirty (30) days after commencement of deliveries and at

least quarterly thereafter. The molecular percentage of N2 and

CO2 thus determined will be used to determine the

supercompressiblity 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 its expense, 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 accord with Section 9 of these General Terms and

Conditions.

(a) Turbine Meters. Turbine meters, where used,

shall be installed and operated in accordance with AGA

Transmission Measurement Committee Report No. 7, "Measurement of

Gas Turbine Meters", applied in a practical and appropriate

manner, and gas quantities computed, in accordance with generally

accepted industry practices, except that the supercompressibility

factor shall be calculated in accordance with Section 10.6 above.

(b) Orifice Meters. Orifice meters, if used, shall

be installed and operated, and gas quantities computed, in

accordance with AGA Report No. 3, American National Institute

ANSI/API 2530, "Orifice Metering of Natural Gas", applied in a

practical and appropriate manner, except that the supercom-

pressibility factor shall be calculated in accordance with

Section 10.6 above.

electronic or other types of flow computers is mutually agreeable

to Transporter and Shipper, they 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

mutual agreement thereto by the parties.