Concrete Surface Preparation JHA (Job Hazard Analysis / Activity Hazard Analysis)

Updated 2026-06-23

A Concrete Surface Preparation JHA (Job Hazard Analysis / Activity Hazard Analysis) is the plan that keeps the surface-prep crew from breathing the silica generated profiling concrete, being struck by projectiles from the equipment, or harmed by the noise and dust of shot blasting, scarifying, and grinding. Concrete surface preparation profiles and cleans concrete to receive coatings, overlays, and repairs — using shot blasters, scarifiers, grinders, and similar equipment that all generate substantial silica. This guide walks through building a Concrete Surface Preparation JHA that names the silica, noise, and projectile hazards and assigns the dust-control, PPE, and equipment controls that hold up in the field.

Why concrete surface preparation needs its own JHA

Concrete surface preparation creates the profile and cleanliness a concrete surface needs to bond with a coating, overlay, or repair — removing laitance, contaminants, and old coatings and roughening the surface. The methods include shot blasting (propelling steel shot at the surface), scarifying (rotating cutters that chip the surface), grinding, and abrasive blasting. All of them generate substantial respirable silica, and each has equipment-specific hazards: shot blasters propel and recover steel shot (projectile and containment hazards), scarifiers throw debris and chips, and the equipment is loud. The silica is the dominant and shared hazard, with the equipment projectile and noise hazards alongside, justifying a dedicated JHA.

Breaking concrete surface preparation into steps

The steps for a Concrete Surface Preparation JHA follow the prep:

• Assess the surface and select the preparation method
• Set up dust control for the chosen equipment
• Test old coatings for lead and hazards before removal
• Operate the shot blaster, scarifier, or grinder
• Manage silica, dust, and (for shot blasting) shot containment
• Manage noise, vibration, and projectiles
• Collect and dispose of dust, debris, and spent media
• Verify the surface profile

Each step carries a hazard, and the silica control and the equipment-specific projectile/containment hazards are where the most serious risks concentrate.

The hazards step by step

Respirable silica

All concrete surface preparation methods — shot blasting, scarifying, grinding, abrasive blasting — generate substantial respirable crystalline silica. The controls follow the silica standard: integrated dust collection (shot blasters and scarifiers are typically used with attached vacuum dust collection), vacuum-equipped or wet grinding, respiratory protection where exposures remain, and minimizing dry, uncontrolled dust. The OSHA silica standard specifies engineering controls for these tasks, and dust collection integrated with the equipment is the core control.

Projectiles and equipment hazards

Shot blasters propel steel shot (which must be contained and recovered) and scarifiers throw concrete chips and debris, creating projectile and struck-by hazards, and the rotating equipment can catch. The controls are using the equipment's containment and recovery systems (shot blasters are largely enclosed for this reason), eye and face protection, guarding, keeping clear of the discharge, and exclusion zones around open blasting.

Noise and vibration

Surface-preparation equipment is loud and transmits vibration. The controls are hearing protection, anti-vibration measures, limiting continuous exposure, and equipment maintenance.

Lead and toxic coatings

Removing old coatings can release lead and other toxic materials. The controls are testing old coatings for lead before removal, applying lead controls where present, and containing and managing the toxic spent material. (These follow the sandblasting fundamentals.)

A simple Concrete Surface Preparation JHA structure

Integrated dust collection across methods

The unifying control in a Concrete Surface Preparation JHA is integrated dust collection, because every preparation method generates substantial silica and the engineering control is to capture the dust at the equipment. Shot blasters and scarifiers are designed to be used with attached vacuum dust collection that captures the silica (and, for shot blasters, recovers the steel shot), and grinders use vacuum or wet methods. This source capture is the silica standard's engineering control, and operating these tools without their dust collection generates a serious, uncontrolled silica exposure. A JHA built on integrated dust collection across whatever method is used, with the equipment's containment systems for projectiles and hearing protection for the noise, addresses the hazards that make concrete surface preparation a significant exposure.

From the field: what actually goes wrong

In fourteen years across federal, heavy civil, and industrial projects, concrete surface preparation is a silica-generating family of tasks, and the unifying lesson is to use the equipment's dust collection. Shot blasters, scarifiers, and grinders all generate substantial respirable silica, and they are designed to be used with integrated dust collection that captures the silica at the source — a shot blaster is largely enclosed and connected to a dust collector for exactly this reason. The crews who get over-exposed are the ones who run the equipment without the dust collection working, or who use uncontrolled methods. On the projects I have run, the dust collection is not optional; it is the engineering control the silica standard requires for these tasks, and it also keeps the work area clean.

The equipment hazards vary by method. Shot blasters propel and recover steel shot, so containment matters — shot that escapes is a projectile. Scarifiers throw concrete chips, demanding eye and face protection. The equipment is loud and transmits vibration, so hearing protection and vibration management apply. And removing old coatings can release lead, which has to be tested for before removal. On the projects I have run, the combination that protects the surface-prep crew is integrated dust collection for the silica, the equipment's containment for projectiles, hearing protection, and lead testing on old coatings. The JHA that captures the dust at the equipment is the one that protects the crew's lungs.

The method choice itself is a safety decision worth making deliberately. Shot blasting is largely enclosed and self-contains the silica and shot, making it one of the cleaner methods for large flat areas; scarifying is aggressive and throws more debris; grinding is versatile but needs its own dust control; and chemical stripping of coatings trades the dust hazard for a chemical one. On the projects I have run, matching the method to the surface and the exposure — favoring the enclosed, dust-collected methods where the area allows — reduces the hazard before any PPE is donned, which is the point of working up the hierarchy of controls. Selecting the method with the dust and projectile hazards in mind, rather than defaulting to whatever equipment is on hand, is the first control in the surface-prep JHA.

The bottom line

A Concrete Surface Preparation JHA names the silica, the noise, and the projectile hazards with specific controls — integrated dust collection on shot blasters, scarifiers, and grinders as the silica engineering control, the equipment's containment and recovery systems for projectiles, hearing and vibration management, and lead testing on old coatings. The silica is the shared dominant hazard, controlled by capturing dust at the equipment. The JHA built on integrated dust collection is the one that protects the crew.

Frequently asked questions

How is silica controlled in concrete surface preparation?

By integrated dust collection at the equipment — shot blasters and scarifiers are designed to be used with attached vacuum dust collection that captures the silica at the source, and grinders use vacuum or wet methods — with respiratory protection where exposures remain. This source capture is the silica standard's engineering control; operating the equipment without its dust collection generates a serious exposure.

What projectile hazards does surface preparation involve?

Shot blasters propel steel shot that must be contained and recovered, and scarifiers throw concrete chips and debris, creating projectile and struck-by hazards. Controls are using the equipment's containment and recovery systems (shot blasters are largely enclosed), eye and face protection, guarding, and exclusion zones around open blasting.

Why test old coatings before surface preparation?

Removing old coatings can release lead and other toxic materials into the dust and debris, so old coatings are tested for lead before removal, lead controls are applied where present, and the toxic spent material is contained and managed.

Is surface preparation loud?

Yes. Shot blasters, scarifiers, and grinders are loud and transmit vibration, so hearing protection, anti-vibration measures, limiting continuous exposure, and equipment maintenance are part of the controls.

Related JHAs

• Concrete Surface Grinding JHA — grinding as a preparation method
• Sandblasting Operations JHA — abrasive blasting and lead controls
• Concrete Repair JHA — preparing surfaces for repair
• Painting and Coating Operations JHA — coating after preparation

Written by Mustafa Tok, CSP, ASP, CHST — OSHA Authorized Outreach Trainer with 14+ years of international construction safety experience across federal, heavy civil, and industrial projects.