Westgas Interstate, Inc.

First Revised Volume No. 1

Effective Date: 04/01/2003, Docket: RP00-545-001, Status: Effective

Second Revised Sheet No. 45A Second Revised Sheet No. 45A : Effective

Superseding: First Revised Sheet No. 45A

GENERAL TERMS AND CONDITIONS

(Continued)

6. QUALITY OF GAS

6.1 HEAT CONTENT. The gas delivered at each of the

points of receipt and delivery shall contain a gross

heating value of not less than 950 Btu's per cubic foot

for more than 1,150 Btu's per cubic foot.

6.2 MERCHANTABILITY. The gas shall be commercially free

from dust, gums, gum-forming constituents, dirt,

impurities or other solid or liquid matter which might

interfere with its merchantability or cause injury to or

interference with proper operation of the pipelines,

regulators, meters, or other equipment of Transporter. The

gas shall also be free of all matter that is deemed

hazardous or toxic and is subject to regulation by the

Environmental Protection Agency or any State agency

having similar jurisdiction or authority.

6.3 HYDROGEN SULFIDE. The gas shall not contain more

than 0.5 grain of H2S per 100 cubic feet.

6.4 TOTAL SULFUR. The gas shall not contain more than 20

grains of total sulfur per Mcf, of which not more than 2

grains shall be mercaptan sulfur.

6.5 OXYGEN. The gas shall not at any time have an oxygen

content in excess of ten parts per million by volume, and

the parties shall make every reasonable effort to keep the

gas free of oxygen.