Drainage away from Wells or Leaching Beds

(1)  Surface drainage shall be directed away from the location of a water supply well or leaching bed.

Article Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.

Leaching field : Septic drain fields, also called leach fields or leach drains, are subsurface wastewater disposal facilities used to remove contaminants and impurities from the liquid that emerges after anaerobic digestion in a septic tank. Organic materials in the liquid are catabolized by a microbial ecosystem.

Source: Septic drain field – Wikipedia