May 20, 2002
(N)
NYSE:STR
02-09

Contact: R. Curtis Burnett
Business: (801) 324-5647

Questar Corp. Confirms It Has Not Engaged in "Wash" Trades

SALT LAKE CITY — Questar Corp. (NYSE:STR) announced today that a review of trading operations of a subsidiary, Questar Energy Trading (QET), revealed no transactions that inflated volume or revenues similar to those recently disclosed by other energy companies.

QET is primarily engaged in sales and risk-management activities related to affiliate equity oil and gas production. QET discontinued electricity trading in 1999. An internal review of QET's trading activity found no instances of transactions involving simultaneous purchases and sales with the same counterparty at the same price, or so-called "wash" trades.

Questar is a $3.1 billion integrated natural gas company headquartered in Salt Lake City, Utah. Through subsidiaries, it engages in energy development and production, gas gathering and processing, wholesale gas and liquids marketing, retail energy services, interstate gas transmission and storage, and retail gas distribution.

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