First, describe the work and worksite
A specialist pump operator and assigned helpers will carry out routine manufacturer-permitted water cleanout of a ground-level concrete delivery pipeline after a completed building pour. A controlled receiving arrangement contains the discharge; the actual equipment procedure governs all pressure and isolation actions. This fictional learning example describes planned controls; it records no actual inspection or work authorization.
- The pump, line, fittings, supports, cleaning method and receiving equipment must be compatible under current manufacturer instructions.
- This is a planning example for a known, unobstructed line; it provides no valve sequence, pressure setting or cleaning-device recipe.
- It covers part of concrete pump cleanout. Compressed-air cleaning, blockage removal, high-rise risers, hopper entry and equipment repair are excluded.
Questions before work
- Does the actual pump/line procedure permit this water method with the available receiving equipment?
- Who controls every pressure source and verifies the safe condition before a connection is touched?
- How will the discharge exclusion area, containment capacity and operator-helper communication be maintained?
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 the routine cleanout method
Hazard: An unsuitable cleaning arrangement can separate fittings or discharge material unexpectedly.
Control: Pump operator checks the current manufacturer procedure, line condition and compatible cleanout/receiving components. Confirm the operation is routine cleaning, not suspected blockage removal; stop if equipment or method suitability is unresolved.
Verification: Operator and site lead confirm the written method and scope before setup.
Why this belongs in the analysis: Water cleaning still needs an equipment-specific pressure and discharge plan.
2. Establish the receiving boundary
Hazard: Concrete, water or a cleaning device can strike a person or overflow into a travel route.
Control: Site lead provides the prescribed receiving/catching arrangement and adequate contained capacity. Close the discharge and line-of-fire area to workers and other trades; select protected observation and helper positions outside potential discharge paths.
Verification: Lead checks receiving equipment, capacity and boundaries with the operator before connection work.
Why this belongs in the analysis: A water method does not remove the hazard at the line outlet.
3. Verify isolation for setup
Hazard: Residual or reintroduced pressure can eject a coupling or drive unexpected equipment movement.
Control: Operator controls all identified energy/pressure sources using the actual procedure. Verify the specified safe condition before any connection or guard is disturbed; keep helpers clear and do not treat a single gauge indication as complete verification.
Verification: Operator confirms the verified condition and authority to approach each connection.
Why this belongs in the analysis: A stopped pump and a safely depressurized line are different states.
4. Assemble and check the arrangement
Hazard: Wrong connectors, insecure supports or bypassed restraint can let the line or outlet move.
Control: Assigned personnel assemble only the manufacturer-permitted components after isolation verification. Check connection compatibility, locks, line supports, restraint and discharge capture against instructions; do not improvise caps or fittings.
Verification: Operator checks the complete arrangement and clears helpers before initiating cleaning.
Why this belongs in the analysis: Compatible parts and a contained outlet must function as one system.
5. Conduct cleaning under operator control
Hazard: Unexpected movement, interrupted discharge or changed pressure can expose helpers to hose whip or material release.
Control: Operator follows the approved water-cleanout procedure while maintaining communication and the exclusion area. Observe from designated positions; stop and return to the prescribed safe state for abnormal response. Do not use compressed air to force a stalled cleanout.
Verification: Operator and boundary attendant monitor line response, receiving capacity and continued separation.
Why this belongs in the analysis: An abnormal response ends this routine scenario; it does not authorize blockage clearing.
6. Verify safe closeout and hand over
Hazard: Opening a connection too early can release retained pressure; contaminated residue can expose cleanup workers.
Control: Use the actual shutdown, pressure-release and verification procedure before disassembly. Keep discharge restrictions until the safe condition is established, contain residue and hand remaining defects or cleanup restrictions to the site lead.
Verification: Operator records safe-state verification and unresolved defects; lead accepts the contained waste area.
Why this belongs in the analysis: Closeout must verify the line’s condition before another person approaches.
What does a useful control look like?
| Needs improvement | More useful for this scenario |
|---|---|
| Water is safer, so flush it out. | Operator first verifies a permitted method, compatible components, controlled receiving equipment and an exclusion area; cleaning remains under model-specific instructions. |
| The motor is stopped; undo the coupling. | Operator isolates identified sources and verifies the prescribed safe pressure condition before any helper touches the connection. |
Decisions that change the analysis
May the operator use air when water cleanout stalls?
This example excludes compressed-air cleaning and blockage removal. A stalled or abnormal response requires stopping, establishing the prescribed safe state and obtaining specialist review under the applicable procedure; it does not justify an improvised method.
What must the crew record for actual use?
Record pump and line identity, the procedure revision, compatible cleanout/receiving components, discharge boundaries, responsible operator/helpers, actual safe-state findings, abnormal observations and waste handover. This JHA supplies no equipment-operating sequence.
Agree when the crew will pause
- No discharge, unexpected movement or another abnormal line response.
- Receiving equipment, capacity, connection security or exclusion boundary becomes unsuitable.
- A pressure source, verification method or communication arrangement cannot be controlled.
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
- Model-specific water-cleanout, pressure verification, isolation and emergency instruction for the operator and assigned helpers.
- Crew instruction in hose/line-of-fire boundaries, controlled receiving arrangements and wet-concrete exposure response.
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 example be used as a JSA?
Adapt its Task | Hazard | Control analysis to the employer’s format and actual conditions. The example is a teaching aid, not evidence that controls were checked.
What changes if the project requires an AHA?
Use the governing AHA format, risk method, supporting records and acceptance process. The published formwork AHA demonstrates that additional structure; changing a JHA title does not supply it.
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 1926.702 Concrete equipment and tools
- WorkSafe Queensland Concrete pump hose-whip alert
- US EPA Concrete washout best management practice
Original instructional scenario with planned controls. Primary references support hazard planning. Use actual equipment and product instructions, project design and employer requirements to establish field criteria. Use actual equipment instructions and site requirements alongside these references. Reference review: October 9, 2026.