Questar Overthrust Pipeline Company

Second Revised Volume No. 1-A

Effective Date: 12/15/2007, Docket: RP08- 71-000, Status: Effective

First Revised Sheet No. 96 First Revised Sheet No. 96 : Effective

Superseding: Original Sheet No. 96

GENERAL TERMS AND CONDITIONS

17. BILLING AND PAYMENT

17.1 On or before the 9th business day of each month, Overthrust shall

furnish to Shipper a monthly invoice for the preceding month (including any

other applicable charges). Unless otherwise agreed, transportation invoices

shall state the net billing rate, rather than the maximum discount tariff

rate and the discount amount. Overthrust shall provide a schedule showing

volumes of gas (in Mcf) and heat content (in MMBtu) received and delivered,

including FGRP quantities and any imbalance. Shipper's imbalance statement

will be included in this billing. Invoices shall be based on actuals (if

available) or best available data. Quantities at points where OBAs exist

shall be invoiced based on scheduled quantities.

17.2 On or before the 9th business day of each month, Overthrust shall

bill Shipper for any applicable additional facility charges due according to

the executed transportation service agreement between Overthrust and Shipper.

17.3 When information necessary for billing purposes is in the control

of Shipper, Shipper shall furnish such information to Overthrust on or before

the 5th business day of the month with respect to deliveries of gas during

the previous month.

17.4 Shipper and Overthrust shall have the right to examine, at

reasonable times, books, records and charts of the other to the extent

necessary to verify the accuracy of the statement, charge, or computation

made under or pursuant to any of the provisions.