Best practices include using leakproof, portable washout containers with liners, signage, and access controls

https://washout-bmpxkwk399.trexgame.net/concrete-washout-containment-options-compared-bags-bins-and-basins

Best practices include using leakproof, portable washout containers with liners, signage, and access controls, positioned away from drains and sensitive areas to contain sediment and caustic residues.