Dowel Drilling: Control Dust at Every Hole

Know the hazard

Team: Concrete Workers. Topic: Respirable Silica.

Dowel drilling is repetitive work, which can make each hole seem insignificant. Repetition is exactly why the dust-control method must keep working through the entire pattern. Dust released during drilling or hole cleaning can reach the operator and adjacent crews. The objective is to capture or suppress the dust through the evaluated system, not to make a cloud disappear after everyone has breathed it.

Use the controls

Before drilling, check the designated collection or suppression equipment, hoses, bit arrangement, and maintenance indicators. Use the system required by the employer's exposure-control plan for this rig and task. Different drilling equipment can require different controls, so do not assume an attachment from another machine is equivalent. Keep bystanders outside the work boundary and coordinate with crews whose tasks may carry them across the drilling path.

Work within the safe plan

Use the approved hole-cleaning method. Blowing debris with compressed air can create a separate exposure problem and is not the automatic finishing step. Stop if dust escapes abnormally or collection performance changes, and have the cause corrected before resuming. Emptying a collector and handling filled containers also need controlled methods. Record tool and control problems with enough detail that the next shift can correct them. Consistent control across hundreds of holes is more useful than a careful demonstration at the start followed by improvised work for the rest of the day.

Discuss with the crew

The drill captures dust, but the operator uses an air wand to clean every finished hole into the work area.

Question: What has been overlooked?
Answer guidance: Hole cleaning is a separate dust-generating step requiring an approved controlled method.

Question: Should control performance be checked only during startup?
Answer guidance: No. Monitor its effectiveness throughout the repeated work and maintenance.

Prepare, act, and follow up

Leader preparation: Bring the drilling-rig control instructions and cleaning procedure.

Put it into practice: Review the entire drilling-to-cleaning sequence and identify each dust-producing step.

Supervisor follow-up: Confirm the selected drilling and hole-cleaning methods match the written plan.

Official reference: NIOSH: Reducing Hazardous Dust Exposure When Dowel Drilling in Concrete
https://www.cdc.gov/niosh/publications/numbered/2015-200.html

Awareness briefing. Apply current site procedures and applicable requirements. This talk does not replace required qualification, practical training, exposure assessment, medical evaluation, or a written program.

Suggested session: 5-7 minutes, including discussion and activity. Prepared October 18, 2026; recheck current requirements before use.

Show the crew

Review the entire drilling-to-cleaning sequence and identify each dust-producing step.