Questar Southern Trails Pipeline Company

Original Volume No. 1

Effective Date: 03/24/2010, Docket: RP10-388-000, Status: Effective

Fifth Revised Sheet No. 6 Fifth Revised Sheet No. 6

Superseding: Fourth Revised Sheet No. 6

STATEMENT OF NEGOTIATED RATES

(Rates per Dth/d)

Shipper/Rate Schedule/Contract Reservation Usage Primary Primary

Identification Term of Contract Dth/d Charges Charges 1/ Rec.Pts. 2/ Del.Pts. 2/

Sempra Energy Trading LLC (FT) #4027 6/ 7/1/2008 - 10/31/2012 4/ 40,000 $11.22231 3/ MAP 3 MAP 302

Shell Energy North America (US), L.P.

(FT) #3662 5/ 7-1-2008 - 6-30-2015 40,000 $11.22231 3/ MAP 1 MAP 302

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1/ Shipper shall also pay the applicable ACA usage surcharge.

2/ Shippers frequently, even daily, seek to amend receipt and/or delivery measurement and allocation points (MAP) under these contracts. However,

these amendments are usually limited to one or two points, and all MAP changes that are granted are kept on file indefinitely.

3/ The maximum rate in Southern Trails' Statement of Rates.

4/ Upon expiration, this agreement will continue year to year thereafter until terminated by Shipper upon 90 days written notice.

5/ This contract does not deviate in any material aspect from the Form of Service Agreement.

6/ This contract has been filed as a non-conforming contract with the Commission.