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. 71 First Revised Sheet No. 71 : Effective

Superseding: Original Sheet No. 71

10. MEASUREMENT

The volume and the total heating value of the gas delivered

to Transporter at the Receipt Point(s) and made available to or

on behalf of Shipper at the Delivery Point(s) shall be determined

as follows:

10.1 Unit of Measurement. The unit of gas, for the

purpose of measurement, shall be one (1) Mcf.

10.2 Heating Value Per Cubic Foot. The total heating value

of the gas per cubic foot shall be determined for any month by

chromatographic analysis of a sample of gas collected daily

during the month by taking the weighted average of the heating

values as recorded each day by a calorimeter or as determined

by, or any other method mutually agreed upon by Shipper and

Transporter.

10.3 Determination of Dekatherms Delivered. The dekatherms

delivered shall be determined by multiplying the Mcf delivered by

the ratio of the Btu per cubic foot delivered to 1,000. For

purposes of this determination, the specific gravity and heating

value shall be determined at approximately the same time.

10.4 Determination of Temperature. The temperature of the

gas passing through each meter shall be determined for any day by

the continuous use of a temperature recording device so installed

that it may properly record the temperature of the gas flowing

through each meter. The arithmetical average of the temperature

recorded each day shall be used in computing gas quantities.

10.5 Specific Gravity. The specific gravity of the gas

shall be determined by calculations based on chromatographic

analysis and shall be checked at least once each month, or any

other method mutually agreed upon by Shipper and Transporter.

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