Questar Pipeline Company

First Revised Volume No. 1

Effective Date: 08/01/2002, Docket: RP00-397-002, Status: Effective

Fourth Revised Sheet No. 81 Fourth Revised Sheet No. 81 : Effective

Superseding: Third Revised Sheet No. 81

Part 1

General Terms and Conditions

(Continued)

12.10 Unauthorized Receipt or Delivery of Gas. If a

shipper delivers gas to Questar or takes gas from Questar

and (i) has made no nomination under an existing service

agreement or (ii) has no valid service agreement, then

Questar may impose the unauthorized overrun charge set forth

on the Statement of Rates. In addition, upon determination

that such unauthorized action has been taken by a shipper,

Questar may take action to terminate such unauthorized use

of its system.

12.11 Imbalances with the Other Parties. Questar shall

not be responsible for eliminating any imbalances between

shipper and any other party, including without limitation

any volume imbalances that accrue between distribution

companies and specific end users or between producers and

distribution companies or end users. Furthermore, Questar

shall not be obligated to adjust or deviate from its

standard operating and accounting procedures in order to

alleviate any such imbalances or deficiencies.

12.12 Third Party Imbalance Management. Questar

will allow shippers to obtain imbalance-management service

from a third-party provider (TPP) subject to the following:

(a) All transactions involving the physical

payback of gas or trading of imbalances on Questar's system

must comply with the terms and conditions of Questar's

tariff.

(b) The trading or curing of imbalances may only

involve procedures that are provided for in Questar's

tariff.

imbalances in any manner that will increase a shipper's

imbalance on Questar's system.

(d) Trading of imbalances may only be between

imbalances on Questar's system.