SALT LAKE CITY — Questar Gas Tuesday asked the Utah Public Service Commission to approve an immediate $42 million one-time refund to customers.

If approved, the refund would amount to about $34.50 for the typical customer, and would be a credit on current customers’ May natural gas bill.

“The purchase price of natural gas we buy for our customers has fallen and is expected to remain stable in the near term,” said Craig Wagstaff, senior vice president of Questar Gas. “Typically, customers would see these lower prices reflected over time as rates are adjusted. With this proposal, customers will see a more immediate reduction."