Questar Pipeline Company

First Revised Volume No. 1

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Effective Date: 05/01/2001, Docket: RP01-329-000, Status: Effective

Fourth Revised Sheet No. 93 Fourth Revised Sheet No. 93 : Superseded

Superseding: Third Revised Sheet No. 93

PART 1

GENERAL TERMS AND CONDITIONS

(Continued)

18.7 Contested Bills. Any billing or statement may be

contested within 180 days from its receipt by shipper. If

invoice is in dispute, the shipper shall pay portion not in

dispute and provide documentation identifying the basis for

the dispute. Questar 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 Questar 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 Questar, furnishes a surety bond guaranteeing

payment in the amount of the disputed portion of the bill,

then Questar 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.

18.8 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, Questar 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 Questar of the amount. In the event that any

portion of a statement is in dispute, payment of the

disputed portion shall not be deemed a waiver of the right

to contest such disputed portion in any forum having

jurisdiction.

18.9 Prior-Period Adjustments. The prior-period

adjustment time limit shall be six months from the date of

the initial transportation invoice and seven months from the

date of the initial sales invoice with a three-month