What are the key steps in proper well abandonment?

What are the key steps in proper well abandonment?

• A. Cap the borehole first, then fill with water.
• B. Wait several months before sealing.
• C. Remove pump if present, seal the screen with grout, fill the borehole with grout or cement from bottom to top, cap if required, and document.
• D. Flush the borehole with clean water and seal.

Answer: (C)