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New Source Review (NSR) Permitting

Northwest Pipeline Corporation - Permitting Information

1. Facility Information

Northwest Pipeline Corporation

2. Location

Mount Vernon, Washington. Skagit County. 48øN 25'19" latitude, 122øW 12'58" longitude.

3. Distance from US/Canada Border

30 miles

4. Facility Type and Size

Existing 12,424 horsepower natural gas pipeline compressor station utilizing two combustion turbines. Applicant proposes to install two additional turbines to increase capacity by 17,341 horsepower @ 59øF .

5. Sources of Emissions

Natural gas fired turbines

6. Type of Fuel

Natural gas

7. Type and Quantity of Emissions


8. Emission Control Technology

For two new gas fired combustion turbines (additional 17,341 horsepower @ 59øF), maximum permitted potential to emit considering controls:

Pollutant Quantity of Emissions
(tons / yr)
Emission Control Technology
PM10 4.1 Pipeline natural gas & good combustion practices
SO2 2.1 Pipeline natural gas & good combustion practices
NOx 61.8 Pipeline natural gas, good combustion practices & SoLoNOx™
VOC 21.6 Pipeline natural gas & good combustion practices
CO 75.3 Pipeline natural gas & good combustion practices
HAP 0.8 Pipeline natural gas & good combustion practices

9. Date Permit Application Received

December 3, 2001. Draft permit proposed to public June 24, 2002.

10. Stack Height and Diameter

Height: 50 feet
Square Width: 4 feet

Stack 2:
Height: 40 feet
Square Width: 8.46 feet

11. Permit Agency Contact

State of Washington Department of Ecology
Air Quality Program
Attn: Bernard Brady
P.O. Box 47600
Olympia, WA 98504-7600

Phone: 360.407.6803

Northwest Air Pollution Authority
Attn: Lester Keel
1600 South 2nd Street
Mount Vernon, WA 98273-5202

Phone: 360.428.1617, ext 209