Air Quality 

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2012 Ozone Contingency Plans 

• Anschutz
• Newfield 
• QEP
• Shell
• Ultra
• Wexpro
• Yates  

2011 Ozone Contingency Plans 

• Anschutz
• Jonah Gas Gathering 
• Newfield 
• QEP
• Shell
• Ultra
• Wexpro
• Yates  

DEQ Visibility Threshold Memo - September 2009

Equivalent Reduction/Leak Detection & Repair  

• BLM Approval Memo - Newfield & Yates - January 2010
• DEQ/AQD Acceptance Letter - Newfield & Yates - January 2010

• Anschutz Equivalent Reduction Letter to BLM - August 2009
• Newfield Equivalent Reduction Letter to BLM - September 2009
• Yates Equivalent Reduction Letter to BLM - September 2009
  • Yates Supporting Documentation

• DEQ LGS Equivalent Methodology Memo - July 2009 
• DEQ/AQD Letter to Anschutz - April 2009
• DEQ/AQD Letter to Newfield - April 2009
• DEQ/AQD Letter to Yates - April 2009