Questar Southern Trails Pipeline Company

Original Volume No. 1

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Effective Date: 08/01/2009, Docket: RP09-780-000, Status: Effective

Second Revised Sheet No. 31 Second Revised Sheet No. 31

Superseding: First Revised Sheet No. 31

GENERAL TERMS AND CONDITIONS

These General Terms and Conditions apply to the transportation service

provided under Rate Schedules FT and IT and negotiated rate agreements of

Southern Trails' FERC Gas Tariff, Original Volume No. 1.

1. DEFINITIONS

1.1 Alternate receipt or delivery point or secondary receipt and

delivery point means any point where gas is received into or delivered out of

Southern Trails' system that is not listed as a primary receipt or delivery

point in Shipper's Rate Schedule FT service agreement.

1.2 Authorized overrun means that quantity of gas authorized by

Southern Trails in excess of the RDC specified in the applicable firm

transportation service agreement.

1.3 Bidding period means that period of time that released or

uncommitted firm capacity is posted on Southern Trails' informational postings

and Questline during which Shippers may bid for capacity.

1.4 Bidding Shipper means any Shipper that is qualified to bid for

capacity via Southern Trails' Web site.

1.5 Btu means one British thermal unit, which is the amount of heat

required to raise the temperature of one pound of water one degree from 59

degrees to 60 degrees Fahrenheit. MMBtu means one million Btu's.

1.6 Capacity release means the release by a firm Shipper of its

capacity.

1.7 Contract Transportation Path (CTP) means the contiguous set of

RPGs and DPGs between a shipper's contracted primary FT receipt and delivery

points.

1.8 Cubic foot means the volume of gas that would occupy a space of

one cubic foot at a temperature of 60 degrees Fahrenheit and at a pressure of

14.73 pounds per square inch absolute.

1.9 Curtailment means reduction or temporary suspension of firm

service.

1.10 Daily quantity (DQ) means the quantity of gas set forth on

Shipper's transportation service agreement under Rate Schedule IT.