Caprock Pipeline Company

First Revised Volume No. 1

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Effective Date: 06/01/1997, Docket: RP97-139-001, Status: Effective

First Revised Sheet No.7 First Revised Sheet No.7 : Effective

Superseding: Original Sheet No. 7

1.13 The term "Gross Heating Value" shall mean the number of

Btu's liberated by the complete combustion at a constant

pressure, of one (1) cubic foot of gas, at a base temperature of

sixty degrees (600) Fahrenheit and a referenced pressure base of

fourteen and seventy-three hundredths ( 14.73) pounds per square

inch absolute, with air of the same temperature and pressure of

the gas, after products of combustion are cooled to the initial

temperature of the gas, and after the water of the combustion is

condensed to the liquid state. The Gross Heating Value of the

gas shall be corrected for the water vapor content of the gas

being delivered; provided, however, that if the water vapor

content of the gas is seven (7) pounds or less per one million

(1,000,000) cubic feet, the gas shall be assumed to be dry and no

correction will be made.

ARTICLE II

QUALITY OF GAS

2.1 All gas delivered by Shipper (or its designee) to

Caprock at the Delivery Point shall conform to the following

specifications:

(A) Water Vapor: The gas shall in no event have a

water vapor content in excess of seven (7) pounds of water

vapor per million (1,000,000) cubic feet of gas measured at

a pressure base of fourteen and seventy-three hundredths (

14.73) psia and at a temperature base of sixty degrees (600)

Fahrenheit.

(B) Hydrogen Sulfide: The gas shall not contain more

than one quarter (0.25) grain of hydrogen sulfide per

hundred (100) cubic feet.

(C) Total Sulphur: The gas shall not contain more than

two (2) grains of sulfur per one hundred (100) cubic feet of

gas.

(D) Mercaptans: The gas shall not contain more than

five (5) parts per million (PPM) by volume of mercaptan.

(E) Temperature: The gas shall not have a temperature

of less than forty degrees (400) Fahrenheit, nor more than

one hundred twenty degrees (1200) Fahrenheit.

(F) Carbon Dioxide: The gas shall not contain in

excess of two percent (2%) by volume of carbon dioxide.

(G) Oxygen: The gas shall not contain in excess of

five (5) parts per million (PPM) by volume of oxygen.

(H) Nitrogen: The gas shall not contain in excess of

two percent (2%) by volume of nitrogen.