Questar Southern Trails Pipeline Company

Original Volume No. 1

Effective Date: 10/24/2003, Docket: RP03-612-000, Status: Effective

First Revised Sheet No. 78 First Revised Sheet No. 78 : Effective

Superseding: Original Sheet No. 78

GENERAL TERMS AND CONDITIONS

12.14 Preservation of Records. Southern Trails will retain data as may

be required by appropriate authority.

12.15 Measurement Data Corrections. Measurement data corrections will

be processed within six months of the production month with a three-month

rebuttal period. This standard will not apply in the case of deliberate

omission or misrepresentation or mutual mistake of fact. Parties' other

statutory or contractual rights shall not otherwise be diminished by this

standard.

12.16 Cut Off. The cut off for the closing of measurement is five

business days after the business month.

13. QUALITY OF GAS

13.1 Heat Content. The gas delivered at each of the points of receipt

and delivery shall contain a gross heating value of not less than 980 Btu's

per cubic foot nor more than 1,150 Btu's per cubic foot.

13.2 Merchantability. The gas shall be commercially free from dust,

gums, gum-forming constituents, dirt, impurities or other solid or liquid

matter which might interfere with its merchantability or cause injury to or

interference with proper operation of the pipelines, regulators, meters, or

other equipment of Southern Trails. The gas shall also be free of all matter

that is deemed hazardous or toxic and is subject to regulation by the

Environmental Protection Agency or any State agency having similar

jurisdiction or authority.

13.3 Hydrocarbon Dew Point. Shall have a hydrocarbon dew point of no

more than 60 degrees Fahrenheit at 800 psig and/or no more condensable

hydrocarbons in free liquid form than that which constitutes a wetting of the

pipe walls in the lines of the inlet side of any pressure-reducing regulator

in the delivery facilities, or in the absence of such regulator no more such

free hydrocarbon liquids shall be present in the piping at the point of

delivery than that which constitutes a mere dampening of the pipe walls.

13.4 Hydrogen Sulfide. The gas shall not contain more than .25 grain

of H2S per 100 cubic feet.