1.   Facility Information:
     Northwest Pipeline Corporation

     2.   Location: 
          3 km east of Sumas, Washington.  Whatcom County.  UTM Coordinates: 557127 meters
     east, 5427616 meters north.
               
     3.   Distance from U.S./Canada border:
     1 mile

     4.   Type and Size of Facility:
          Existing 41,200 horsepower natural gas pipeline compressor station utilizing two
     combustion turbines and six reciprocating engines.  Applicant proposes to install one
     additional turbine to increase capacity by 12,841 horsepower @ 59øF.  Applicant also
     proposes to replace the engines of the two existing turbines with new, lower emitting
     engines.

     5.   Source of Emissions:
     Natural gas fired turbines and reciprocating engines

     6.   Type of fuel:
     Natural gas

     7.   Type and Quantity of Emissions &
     8.   Emission Control Technology:

For installation of one new gas fired combustion turbine and replacement of engines at two
existing turbines, maximum permitted potential to emit and net emissions increase of the three
units considering controls:

						Past Actual
			Quantity		Emissions 1/99 to		Net
			of			12/00 for two			Emissions
			Emissions		removed turbine			Increase
Pollutant	        (tons / yr)		engines (tons / yr)		(tons / yr)		Emission Control Technology

PM10		        8.68										Pipeline natural gas & good combustion practices
SO2			4.47										Pipeline natural gas & good combustion practices
NOx			130.86			94.6				36.26		        Pipeline natural gas, good combustion practices & SoLoNOx
VOC			9.12										Pipeline natural gas & good combustion practices
CO			159.33			8.5				131			Pipeline natural gas & good combustion practices
HAP			1.6										Pipeline natural gas & good combustion practices


     9.   Application Received:
          December 3, 2001.  Additional information received May 23, 2002.  Draft permit
     proposed to public soon.  See http://www.ecy.wa.gov/programs/air/psd/PSD_Publiccomments.html

     10.  Stack height and diameter:

		  Stack 1 (new turbine):
          Height: 39.41 feet
          Square Width: 7.5 feet

          Stack 2 (replacement engine):
          Height: 39.41 feet
          Square Width: 7.5 feet

          Stack 3 (replacement engine):
          Height: 39.41 feet
          Square Width: 7.5 feet
          
     11.  Permitting Authority:
          State of Washington Department of Ecology
          Air Quality Program
    	  Attn: Bob Burmark
          P.O. Box 47600
          Olympia, WA 98504-7600

          Phone: 360.407.6812

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

	      Phone: 360.428.1617, ext 203