NGA Direct Assessment Projects

1
NGA Direct Assessment Projects

• Debbie DiMeo, Director, Plans and Operations
• Northeast Gas Association
• OPS ECDA Public Meeting November 4, 2003

ddimeo_at_northeastgas.org
2
NGA Phase 1 ECDA Validation Complete

• Began work in 4/02 Prove the ECDA process works
  and show that its a valid integrity assessment
  technique.
• 9 NYS LDC companies and NY PSC
• 20 miles of pipe
• 66 excavations
• 43 indications
• 23 controls
• Results reported 4/03

3
NGA Phase 1 ECDA Statistical Analysis

• ECDA quantitatively verified to detect coating
  flaws and corrosion damage
• Indications and controls differ (95 CI)
• P(damage) at indication 98
• P(damage)/P(control) 300/1
• POD for coating flaws f(bare area)
• 35 for lt1in2 and 100 gt6in2

4
NGA Phase 2 DA ProjectInitiated

• Effort initiated April 2003
• Additional ECDA to support validation
• 60 miles
• 12 companies participating 8 NYS 4 o/s NYS
• Develop ECDA methods for special areas
• Cased crossings
• Uncased crossings
• Bare pipe
• Stray current
• ICDA demonstration

5
Phase 1 and 2 Participants

• Nine NYS LDC NGA members participated in Ph 1 DA
  Validation Project
• KeySpan Central Hudson
• National Fuel St. Lawrence Gas
• NYS Electric Gas Consolidated Edison
• Niagara Mohawk Orange Rockland
• Rochester Gas Electric
• Twelve LDCs participating in Ph 2 DA Project
• KeySpan Central Hudson
• National Fuel Enbridge/St. Lawrence Gas
• NYS Electric Gas Consolidated Edison
• Niagara Mohawk Orange Rockland
• Rochester Gas Electric PECO
• Questar Public Service Electric Gas

6
NGA DA

• More info (www.northeastgas.org)
• Debbie DiMeo (ddimeo_at_northeastgas.org)
• Vincent Sottile (vsottile_at_keyspanenergy.com)
• Oliver Moghissi (omoghissi_at_cctechnologies.com)