Exhibit No. 32.
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the report of Questar Gas Company (the Company) on Form 10-K for the period ended December 31, 2009, as filed with the Securities and Exchange Commission on the date hereof (the Report), Ronald W. Jibson, President & Chief Executive Officer of the Company, and Richard J. Doleshek, Executive Vice President & Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:
(1)
The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and
(2)
The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
QUESTAR GAS COMPANY
March 11, 2010
/s/Ronald W. Jibson
Ronald W. Jibson
President and Chief Executive Officer
March 11, 2010
/s/Richard J. Doleshek
Richard J. Doleshek
Executive Vice President and Chief Financial Officer