Wet cutting
Supplying water to the blade or bit while cutting, coring, or grinding concrete so dust is captured at the point of generation instead of becoming airborne.
What does wet cutting mean?
Water delivery is the most common engineering control for silica exposure and is built into most modern saws, core drills, and grinders. It requires continuous flow at an adequate rate rather than an occasional spray, and the resulting slurry must be contained and disposed of properly. Where water is impractical, on-tool vacuum systems with filtered collection serve the same purpose.
In practice
The water hose running to a walk-behind saw is a compliance control, and shutting it off to avoid mess is a documented violation.