First, describe the work and worksite
A cleaning crew will apply an approved masonry cleaner to a released ground-level exterior test area and rinse it with controlled low-pressure water. This fictional learning example records planned controls; it supplies no actual inspections or work authorization.
- The actual cleaner, dilution, substrate compatibility and application instructions are confirmed.
- Occupants, adjoining materials and drainage can be protected from splash and runoff.
- This excludes abrasive blasting, high-pressure washing, elevated access and mixing different cleaners.
Questions before work
- Which product and dilution method are authorized?
- Where can splash, vapor and rinse water travel?
- What exposure response and waste arrangements must be ready?
Build the analysis one step at a time
What will the worker do? How could someone be harmed? What prevents or reduces that exposure? Who checks the control, and when?
1. Release product and substrate
Hazard: An incompatible cleaner or unknown finish can create harmful reactions or damage.
Control: Foreperson confirms the approved product and test-area method against substrate information and instructions. Review the label and SDS before use.
Verification: Compare container identity and authorized test area with the cleaning plan.
Why this belongs in the analysis: A generic acid-cleaning label is not a product method.
2. Protect people and drainage
Hazard: Splash, vapor or runoff can reach nearby workers and public areas.
Control: Establish separation, protect affected surfaces and drains, and arrange containment and ventilation for the actual product. Confirm exposure first aid before opening containers.
Verification: Lead walks the potential runoff and exposure routes.
Why this belongs in the analysis: The cleaner’s path extends beyond the wall face.
3. Prepare the product and equipment
Hazard: Dilution splash or incompatible containers can cause chemical burns.
Control: Use the exact product mixing sequence and compatible equipment with selected eye, face, skin and other protection. Do not mix cleaners or improvise dilution.
Verification: Operator checks product instructions, protective equipment and container identification.
Why this belongs in the analysis: The SDS and application instructions provide the chemical-specific controls.
4. Apply to the released area
Hazard: Contact, drift or longer-than-permitted exposure can injure workers or damage material.
Control: Apply by the specified method from a controlled position, maintain separation and follow product contact-time limits. Stop for unexpected reaction, drift or leakage.
Verification: Operator monitors the test area and lead maintains the boundary.
Why this belongs in the analysis: A successful test area is part of the method, not proof of every surface condition.
5. Rinse and collect runoff
Hazard: Slippery surfaces, splash and escaping waste can expose the crew.
Control: Rinse by the approved method with controlled collection and clear footing. Keep the boundary until runoff and exposure conditions meet the site’s release requirements.
Verification: Lead checks containment and access during rinsing.
Why this belongs in the analysis: Rinsing transfers the chemical to another location.
6. Secure waste and hand over
Hazard: Unidentified containers or residual chemical can injure later workers.
Control: Identify and secure leftover product and waste, clean equipment by the instructions and communicate treated areas and remaining restrictions.
Verification: Foreperson verifies container labels, cleanup and the receiving supervisor’s handover.
Why this belongs in the analysis: Clear water appearance alone does not establish waste suitability.
What does a useful control look like?
| Needs improvement | More useful for this scenario |
|---|---|
| Be careful around the equipment. | Use the exact product mixing sequence and compatible equipment with selected eye, face, skin and other protection. Do not mix cleaners or improvise dilution. |
| Check the area before starting. | Foreperson confirms the approved product and test-area method against substrate information and instructions. Review the label and SDS before use. |
Decisions that change the analysis
Does rinsing make the runoff safe for a storm drain?
Do not assume that it does. Use the product and site waste requirements and required approvals. The example provides no discharge permission.
What must be recorded before this example is used on a job?
Replace the scenario with the actual work, identify additional hazards with the crew, and record the applicable instructions, responsible people, inspection findings, unresolved actions and required authorization. A planned verification is not an inspection result.
Agree when the crew will pause
- Product, substrate or dilution method changes.
- Unexpected reaction, drift or worker exposure occurs.
- Containment, ventilation or exposure-response resources fail.
After a pause, correct the condition, reassess the work, and obtain required authorization before restarting. Keep unresolved actions visible.
Download the worked example and free template
No account or paid membership required. The worked example contains planned controls. The blank template is for your own work; neither includes fabricated inspection results, signatures or approval.
Your editable working copy
Build and download your draft
Start blank or load the learning example. Replace its assumptions with your actual conditions and involve the people doing the work. Your entries stay in this browser tab; download a copy before leaving or refreshing.
1. Describe your work and site
2. Work through each task
Describe an observable step, how someone could be harmed, and the control that acts on that hazard. Identify who checks it and what evidence is needed.
3. Record changes, checks, and open actions
Walk the work area, review with the crew, and resolve missing controls. Follow the required approval process. This tool does not judge completeness, verify signatures or authorize work.
Open the downloaded file in a browser, then use Print → Save as PDF for a printable copy.
Training needs to confirm
- Actual product preparation, compatibility, protection and first aid.
- Containment, spill-response limits and authorized waste handling.
Confirm applicable qualifications, task instruction and actual training evidence for the people assigned. Related toolbox talks support crew discussion; they do not establish competence.
Common questions
Can this be used as a JSA?
Use the Task | Hazard | Control structure if it meets the employer’s format. Adapt the boundaries, controls, verification and records to the actual job.
Does this provide a completed USACE AHA?
No. Use the project’s required AHA process, risk method, supporting fields and acceptance requirements. The existing formwork AHA explains the additional structure.
Are these resources part of a paid course?
This walkthrough, browser draft builder and downloads are free public resources, separate from Academy course enrollment.
References and source note
- OSHA 1910.1200 Hazard communication
- OSHA 1926.59 Hazard communication in construction
- OSHA 1926.21 Safety training and education
Original worked example developed for the stated scenario. Primary references support the planning framework; the actual equipment manual, product instructions and project design must supply applicable operating and acceptance criteria. Use actual equipment instructions and site requirements alongside these references. Reference review: October 9, 2026.