ENB Region 6 Completed Applications 06/25/2003

Croghan Compressor Station proposes to modify their existing permit to allow an increase in Particulate Matter (PM) emissions for emission unit 00002.  This modification is proposed pursuant to stack testing results for PM.   The facility did not meet the PM emission limits in their existing permit.  Further investigation revealed that the PM emission limit was based on the latest AP-42 emission factors.  The emission factor was the result of limited testing on only one turbine which is roughly ten times the size of the Croghan emission unit 00002.  Therefore, the Department modified the PM emission limit to correspond with the previous AP-42 emission factor which was based on a much larger test sampling.  The recently completed PM stack testing showed compliance with this emission factor. The Croghan Compressor Station compresses natural gas for distribution throughout the state and is located on Old State Rd., Croghan, Lewis County. This change would be a minor modification of their existing State Facility Permit which limits emissions below Title V thresholds.  The Department has prepared a draft permit and made a tentative determination to approve this application for a modification of an existing permit pursuant to Article 19 (Air Pollution Control) of the NYS Environmental Conservation Law (ECL) and 6 NYCRR Part 201.  The application, draft permit, relevant supporting materials and regulations are available for review during normal business hours at the regional office.  Written comments may be made within the 30 day period ending on the last filing date indicated in this notice.  The Department may modify the draft permit based on significant or important information raised during the comment period.  The Department may also schedule a public hearing based upon an evaluation of the nature and scope of any written comments raised.  Following the 30 day comment period, the Department may then issue the final draft permit.   

The applicant proposes to implement an on-base herbicide management program, utilizing the herbicide Accord.  The application primarily focuses on the Main Impact Area and is intended to maintain unobstructed line-of-sight for observation posts to target areas.  Application would be by aerial spraying.  Approximately 223 acres is scheduled by 2003 with up to 15,133 acres considered for future treatment.  Spraying is targeted to upland areas, but coverage would encroach upon approximately 960 State regulated freshwater wetlands.