Questar Southern Trails Pipeline Company

Original Volume No. 1

Effective Date: 07/15/2004, Docket: RP04-329-000, Status: Effective

First Revised Sheet No. 93 First Revised Sheet No. 93 : Effective

Superseding: Original Sheet No. 93

GENERAL TERMS AND CONDITIONS

may waive the interest on late payment made within five days of the due date.

If an uncontested bill remains unpaid for 30 days or more after payment is

due, Southern Trails, in addition to any other remedy it may have, may, after

giving Shipper 15 days' written notice, suspend further receipt and delivery

of gas for Shipper until full payment for all service rendered to date is

made.

(d) Southern Trails will be entitled to recover any reasonable

expenses, costs or attorney's fees incurred to recover amounts owed for

transportation services rendered by Southern Trails from a defaulting party.

16.7 Contested Billing. Any billing or statement may be contested

within 180 days from its receipt by Shipper. If an invoice is in dispute,

Shipper shall pay the portion not in dispute and provide documentation

identifying the basis for the dispute. Southern Trails shall have 90 days to

provide its rebuttal. This time limit shall not apply in cases of deliberate

omission, misrepresentation or mutual mistake of fact.

If Shipper (i) contests all or any part of a bill in good faith, (ii)

pays to Southern Trails the amounts it concedes to be correct, (iii) provides

documentation identifying the basis of the dispute and (iv) within 30 days of

a demand made by Southern Trails, furnishes a surety bond guaranteeing payment

in the amount of the disputed portion of the bill, then Southern Trails may

not suspend further delivery of gas unless default has occurred under the

conditions of the bond. No payment by Shipper of the amount of a disputed

bill shall prejudice the right of Shipper to claim an adjustment of the

disputed bill. Shipper shall pay interest on disputed portions of a bill for

which Shipper has withheld payment, and which ultimately are found due,

according to the provisions of this tariff.

16.8 Billing Errors. If an error is discovered in the amount of any

bill, the error shall be adjusted within 30 days of the determination that an

adjustment is required, provided that the claim for adjustment shall have

been made within 180 days from the date of the bill. If it is determined

that Shipper has been overcharged, and Shipper has paid the statement

containing the overcharge, then, within 30 days after the final

determination, Southern Trails shall refund the amount overcharged with

interest. If it is determined that Shipper has been undercharged, Shipper

shall pay the amount undercharged with interest calculated as prescribed by

18 C.F.R. § 154.501(d) within 30 days of notice by Southern Trails of the

amount. In the event that any portion of a statement is in dispute, payment

of the disputed portion shall