Columbia Gulf Transmission Company

Second Revised Volume No. 1

Effective Date: 07/16/2008, Docket: RP04-98-004, Status: Effective

Second Revised Sheet No. 235 Second Revised Sheet No. 235

Superseding: Original Sheet No. 235

GENERAL TERMS AND CONDITIONS (Continued)

25. GAS QUALITY

25.1 All gas tendered hereunder shall comply with the following specifications:

(a) Be natural gas and be commercially free from dust, gum, gum-forming constituents,

water, paraffin and other objectionable solid and/or liquid matter.

(b) Contain not more than one grain of hydrogen sulphide per 100 cubic feet.

(d) Contain not more than four percent by volume of nitrogen and carbon dioxide

combined.

(e) Contain not more than three percent by volume of carbon dioxide.

(f) Contain not more than one percent by volume of oxygen.

(g) Contain not more than seven pounds of water vapor per 1,000,000 cubic feet.

(h) Have a gross heating value of not less than 978 Btu per cubic foot.

(i) Have a temperature of not less than 40 degrees Fahrenheit and not more than 120

degrees Fahrenheit.

25.2 Hydrocarbon Dewpoint Specification. Transporter may not refuse to accept receipt of gas with

a Cricondentherm Hydrocarbon Dewpoint ("CHDP") equal to or less than fifteen degrees Fahrenheit (15ºF), provided

that gas satisfies all other applicable provisions of Transporter's FERC Gas Tariff. This standard will be

referred to as Transporter's Hydrocarbon Dewpoint Safe Harbor. Transporter may, as operationally necessary,

establish and post on its EBB a CHDP limit for receipts (no lower than the Hydrocarbon Dewpoint Safe Harbor)

that would prevent actual or anticipated hydrocarbon liquid fallout on Transporter's system, or assure that gas

would be accepted for delivery at interconnects with interstate or intrastate pipelines, end-users, and local

distribution companies.

(a) Transporter has discretion to impose CHDP limits on its entire system, or on specified

portions of its system in a not unduly discriminatory manner, provided that any limit will not be lower than the

Hydrocarbon Dewpoint Safe Harbor, except as provided in Section 25.4. When Transporter posts a CHDP limit on

its system, or for specified portions of its system, all gas receipts into the affected areas must meet the

posted CHDP limit. Such posted CHDP limits shall remain in effect no longer than necessary.

(b) For purposes of posting CHDP limits, Transporter's system is divided into four HDP

Segments. The Market Segment includes all of Transporter's system at and downstream of Rayne, Louisiana; the

West Lateral Segment includes all points west of Rayne, excluding the Blue Water System; the Blue Water System

Segment includes all points on the Blue Water System at and upstream of Egan, Louisiana; and the East Lateral

Segment includes all points east of Rayne, excluding the Blue Water System.