Concrete washout captures rinse water and slurry from chutes, pumps, and tools

https://lima-wiki.win/index.php/From_Slurry_to_Safety:_Concrete_Washout_Management_for_Small_Projects

Concrete washout captures rinse water and slurry from chutes, pumps, and tools, preventing high-pH runoff from polluting soils, drains, and waterways on and around active construction sites.