Job Safety Analysis: Backpack Sprayer Operation

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Step Potential Hazard Control
Assess the spray area Drift onto vehicles or people, uneven terrain, nearby crew entering spray zone Inspect site, identify sensitive areas, set cones near roadways, ensure crew and public remain clear
Review herbicide label and SDS Incorrect mixing ratio, improper PPE, unsafe handling Read product label completely, follow mixing instructions, verify all PPE requirements
Inspect backpack sprayer Leaking tank, cracked hoses, worn seals, clogged nozzle Check tank integrity, test pump action, inspect hose and wand, confirm nozzle pattern is correct
Don required PPE Skin contact, eye splash, inhalation hazards Wear all PPE before mixing or applying any chemical
Mix herbicide solution Chemical splash, fumes, overexposure Mix outdoors or in ventilated area, pour concentrate slowly, use measuring tools, wear apron and gloves, never mix above shoulder height
Fill and pressurize backpack sprayer Overfilling, spills, splash exposure, lifting injury Fill only to recommended level, keep tank on stable surface while filling, tighten cap securely, lift sprayer using legs not back
Put on backpack sprayer Strains, awkward posture, chemical exposure from straps Inspect straps before use, lift sprayer with straight back, adjust straps snugly to prevent shifting
Begin application Drift, overspray, inhalation of mist Spray at low pressure, keep nozzle close to target, apply with wind at your back or postpone during gusts, maintain consistent walking pace
Monitor crew and bystanders Accidental entry into spray zone Maintain clear communication, assign lookout if necessary, stop application if anyone approaches
Refill or troubleshoot sprayer Chemical splash, leaks, unpressurized discharge Depressurize sprayer before opening tank, inspect for leaks, repair damaged components before continuing
End of application and cleanup Residual chemical on sprayer, contaminated rinse water Triple rinse sprayer in designated area, avoid dumping rinse water in ditches or waterways, wash PPE and hands thoroughly
Storage Leaks, chemical contamination Store sprayer empty and clean, keep chemicals locked in labeled cabinet, separate from tools and public areas

Suggested Personal Protective Equipment

  • Chemical resistant gloves

  • Safety glasses or face shield

  • Long sleeves and long pants

  • Chemical resistant boots

  • High visibility vest when near roads

  • Respirator if required by product label

  • Waterproof apron when mixing concentrates

Always have a complete, well-stocked first aid kit available.

JSA Category: Chainsaw, Forestry, and Vegetation Management

* The steps, hazards, and controls displayed above may be incomplete or not suit your department's needs. All job safety analyses should be a completed with frontline worker input to ensure that each potential hazard is identified and mitigated.

Please read about The Essentials Elements of a Solid Job Safety Anaylsis here.

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Job Safety Analysis
Department: __________________________________
Job/Task:   Backpack Sprayer Operation
Location: __________________________________
Date: ____ /____ /____
Supervisor: __________________________________
Crew: __________________________________
Step Potential Hazard Control
Assess the spray area Drift onto vehicles or people, uneven terrain, nearby crew entering spray zone Inspect site, identify sensitive areas, set cones near roadways, ensure crew and public remain clear
Review herbicide label and SDS Incorrect mixing ratio, improper PPE, unsafe handling Read product label completely, follow mixing instructions, verify all PPE requirements
Inspect backpack sprayer Leaking tank, cracked hoses, worn seals, clogged nozzle Check tank integrity, test pump action, inspect hose and wand, confirm nozzle pattern is correct
Don required PPE Skin contact, eye splash, inhalation hazards Wear all PPE before mixing or applying any chemical
Mix herbicide solution Chemical splash, fumes, overexposure Mix outdoors or in ventilated area, pour concentrate slowly, use measuring tools, wear apron and gloves, never mix above shoulder height
Fill and pressurize backpack sprayer Overfilling, spills, splash exposure, lifting injury Fill only to recommended level, keep tank on stable surface while filling, tighten cap securely, lift sprayer using legs not back
Put on backpack sprayer Strains, awkward posture, chemical exposure from straps Inspect straps before use, lift sprayer with straight back, adjust straps snugly to prevent shifting
Begin application Drift, overspray, inhalation of mist Spray at low pressure, keep nozzle close to target, apply with wind at your back or postpone during gusts, maintain consistent walking pace
Monitor crew and bystanders Accidental entry into spray zone Maintain clear communication, assign lookout if necessary, stop application if anyone approaches
Refill or troubleshoot sprayer Chemical splash, leaks, unpressurized discharge Depressurize sprayer before opening tank, inspect for leaks, repair damaged components before continuing
End of application and cleanup Residual chemical on sprayer, contaminated rinse water Triple rinse sprayer in designated area, avoid dumping rinse water in ditches or waterways, wash PPE and hands thoroughly
Storage Leaks, chemical contamination Store sprayer empty and clean, keep chemicals locked in labeled cabinet, separate from tools and public areas
Suggested Personal Protective Equipment


Supervisor signature: __________________________________
Employee initials: ______________________________________________________________________________________________________