Questar Pipeline Company

First Revised Volume No. 1

Effective Date: 05/12/2003, Docket: RP03-342-001, Status: Effective

Sub. Second Revised Sheet No. 85 Sub. Second Revised Sheet No. 85 : Effective

Superseding: First Revised Sheet No. 85

PART 1

GENERAL TERMS AND CONDITIONS

(Continued)

American Petroleum Institute, Manual of Petroleum

Measurement Standards Chapter 14, Natural Gas Fluids

Measurement, Section 3, Orifice Metering of Natural Gas and

Other Related Hydrocarbon Fluids, API Standard 2530 (API

Chapter 14.3).

American Petroleum Institute, Manual of Petroleum

Measurement Standards Chapter 21, Flow Measurement Using

Electronic Metering Systems, Section 1, Electronic Gas

Measurement (API Chapter 21.1).

Gas Processors Association Standard 2145-03, Table of

Physical Constants for Hydrocarbons and Other Compounds of

Interest to the Natural Gas Industry (GPA Standard 2145-03).

Gas Processors Association Standard 2172-96, Calculation of

Gross Heating Value, Relative Density and Compressibility

Factor for Natural Gas Mixtures from Compositional Analysis

(GPA Standard 2172-96).

Gas Processors Association Standard 2261-00, Analysis for

Natural Gas and Similar Gaseous Mixtures by Gas

Chromatography (GPA Standard 2261-00).

14.2 Use of Measurement. Unless otherwise agreed to by

Questar, Questar will install, maintain and operate all

measurement stations, which shall be equipped with

electronic flow computers or conventional chart recorders

and other measurement equipment. The interconnecting

operator may install check measurement equipment at its own

cost and expense if the equipment is installed in accordance

with Questar's specifications and in a manner that will not

interfere with the operations of Questar. Gas volumes

determined according to this section will be used for

billing, balancing, and calculation of fuel use and lost and

unaccounted-for gas, etc.

14.3 Unit of Measurement and Metering Base.

The standard reporting basis for Btu is 14.73 psia and

60 degrees F (101.325 kPa, and 15 degrees C, and dry). The

standard reporting basis for gigacalorie is 1.035646 Kg/cm2

and 15.6 degrees C and dry.The standard reporting basis for

gas volumes is cubic foot at standard conditions of 14.73

psia, and 60 degrees F, and dry. For gas volumes reported

in cubic meters, the standard conditions are 101.325 kPa and

15 degrees C, and dry (NAESB 2.3.9)