WASHINGTON, Sept 30 (Reuters) - The U.S. Federal Trade

Commission denied a petition seeking to reopen and set aside a

final consent order involving a $5.2 billion cash-and-stock deal

between private equity firm Quantum Energy Partners and natural

gas producer EQT Corporation ( EQT ), the agency said on Tuesday.

"Following a public comment period, the FTC determined that

the petition should be denied since Quantum failed to identify

any changes that justify reopening and setting aside the final

order," the FTC said.