The Navajo Nation Environmental Protection Agency (NNEPA), Navajo Air Quality Control Program (NAQCP), Operating Permit Program (OPP) Section is accepting written comments on the renewal of Part 71 permits for the following Transwestern Pipeline Company operations. These operations perform natural gas inlet separation and natural gas compression.

1. Klagetoh Compressor Station Number 4. The Klagetoh Compressor Station is located 10 miles Northeast of Klagetoh, Arizona on the Navajo Nation. The compressor station consists of natural gas fired compressors and reciprocating engines, as well as various storage tanks.

2. Leupp Compressor Station Number 3. The Leupp Compressor Station is located 8 miles East of Leupp, Arizona on the Navajo Nation. The compressor station consists of a natural gas fired turbine compressor, natural gas fired reciprocating engines, and various storage tanks.

This permit is being issued and administered by the Navajo Nation EPA (“NNEPA”) pursuant to the Delegation Agreement between the United States Environmental Protection Agency (“USEPA” or “EPA”) Region 9 and NNEPA, dated October 15, 2004. In accordance with the provisions of Title V of the Clean Air Act, 40 CFR Part 71, Navajo Nation Operating Permit Regulations, and all other applicable rules and regulations, the permittee, Peabody Western Coal Company – Black Mesa Complex, is authorized to operate air emission units and to conduct other air pollutant emitting activities in accordance with the permit conditions listed in this permit.