Questar Pipeline Company

First Revised Volume No. 1

Effective Date: 06/21/2005, Docket: RP05-349-000, Status: Effective

Eighth Revised Sheet No. 79 Eighth Revised Sheet No. 79 : Effective

Superseding: Seventh Revised Sheet No. 79

PART 1

GENERNAL TERMS AND CONDITIONS

(Continued)

notified immediately of any changes to an existing OBA or PDA. Shipper shall

provide Questar a copy of any document effecting changes to an OBA or PDA

immediately upon execution.

12.3 Monthly Balancing.

(a) A shipper must maintain a monthly balance between net

receipts (receipt less fuel use and lost and unaccounted-for gas) and

deliveries within the ± 5% imbalance tolerance.

(b) For the determination of monthly imbalances, shippers'

receipt or delivery volumes at each MAP point shall be allocated according to

the interconnecting operational balancing agreement (OBA) or pre-determined

allocation (PDA). Absent an OBA or PDA, volumes will be allocated pro rata

based on each shipper's scheduled nomination.

at each MAP point will be determined according to the OBA or PDA in place at

the time the volumes were received or delivered. Absent an OBA or PDA,

adjustments will be pro rata according to each shipper's daily scheduled

nomination.

(d) Questar will make monthly imbalance information available to

all shippers through Questline on or before the 9th business day of each

month following the month during which gas was transported. An imbalance

statement will be tendered to shipper with shipper's monthly bill issued

according to Section 18.1(b) of these General Terms and Conditions.

(e) At the end of each calendar month where Shippers' net

transportation receipts (receipt Dth less fuel use and lost-and-unaccounted-

for) do not equal deliveries on a Dth basis, the following procedures will

apply:

(i) Shipper's imbalances under each T-1, T-2 and NNT

agreement will be netted together for monthly imbalance calculations. Each

month on or before the 9th business day, Questar will provide imbalance

statements and information on