Mitigation is required for the following permits:

• General Permit 2 Underground Utility Lines
  
• General Permit 4 Hazardous Site investigation and cleanup
  
• General Permit 5 Landfill Closures
  
• General Permit 27 Redevelopment of Previously Developed disturbed areas
  
• Individual Permit

Generally the following ratios are required:

Creation or Restoration	2:1
Preservation minimum	27:1

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