1.6 WPS: Decontamination & Emergency Medical Assistance

WPS: Decontamination & Emergency Medical Assistance

Why this matters: Every WPS decontamination number is a testable number: how much water, how far away, how long the eye-flush must run. Learn the worker set and the handler set separately, because they differ, and then learn what the employer owes an exposed person.

1. Decontamination Facilities & Emergency Eyewash Infrastructure

Decontamination facilities provide workers and handlers with the immediate physical means to wash toxic residues from skin and eyes, mitigating chemical burns and systemic poisoning.

┌─────────────────────────────────────────────────────────────────────────────────────────┐
│                          DECONTAMINATION SUPPLY SPECIFICATIONS                          │
│                                                                                         │
│  Requirement            Agricultural Workers              Pesticide Handlers            │
│  ─────────────────────  ────────────────────────────────  ────────────────────────────  │
│  Potable Clean Water    ≥ 1 GALLON per worker at start    ≥ 3 GALLONS per handler       │
│  Soap & Towels          Liquid soap & single-use towels   Liquid soap & single-use towels│
│  Clean Clothing Change  Not required                      1 Clean Change (sealed bag)   │
│  Location / Distance    Within 1/4 MILE of all workers    Within 1/4 MILE of handlers   │
│                         (Outside treated area & AEZ)      (At mix/load pad & equipment) │
│  Emergency Eyewash      Not mandated unless handling      Continuous running eyewash    │
│                         pesticides                        (≥ 0.4 gpm for 15 min) OR     │
│                                                           ≥ 1 Pint portable bottle      │
└─────────────────────────────────────────────────────────────────────────────────────────┘

Critical Decontamination Rules

• Water Quality: Decontamination water must be potable (drinking water quality) or clean water tested safe for eye and skin contact. Using irrigation canal water, drainage ditch water, or recycled pond water is strictly illegal.
• Liquid Soap vs. Sanitizers: Alcohol-based hand sanitizers or wet wipes do not dissolve chemical pesticides and cannot substitute for clean water and soap.
• Emergency Eyewash Systems for Handlers: Whenever a pesticide label mandates protective eyewear:
  1. The handler decontamination station (at the mixing/loading site) must feature a plumbed or self-contained emergency eyewash station capable of delivering continuous flowing water at a rate of at least 0.4 gallons per minute (1.5 L/min) for a full 15 minutes.
  2. Every handler operating application equipment must have immediate access to a portable emergency eyewash bottle containing at least 1 pint of sterile water or buffered saline mounted directly on the spray rig or in their pocket.

2. Emergency Medical Assistance & Oregon OSHA Enhancements

Under 40 CFR § 170.313(k) and Oregon OSHA rules, if there is any reason to believe that an agricultural worker or pesticide handler has been poisoned or injured by an occupational pesticide exposure:

┌────────────────────────────────────────────────────────────────────────┐
│                EMPLOYER EMERGENCY MEDICAL ASSISTANCE DUTY              │
│                                                                        │
│  1. PROMPT EMERGENCY TRANSPORTATION:                                   │
│     The agricultural employer MUST immediately provide prompt          │
│     transportation for the affected employee to an appropriate         │
│     emergency medical care facility (hospital, clinic, or ER).         │
│                                                                        │
│  2. MANDATORY INFORMATION DISCLOSURE TO MEDICAL PERSONNEL:             │
│     The employer must provide treating physicians / paramedics with:   │
│     • Safety Data Sheet (SDS) and EPA Product Label;                   │
│     • Product Trade Name, EPA Registration Number, & Active Ingredient;│
│     • Specific circumstances of the application and exposure incident; │
│     • First aid instructions, antidotes, and toxicological data.       │
└────────────────────────────────────────────────────────────────────────┘

Oregon-Specific Agricultural Safety Enhancements (Oregon OSHA Division 4)

Oregon OSHA enforces the WPS as adopted at OAR 437-004-6000, and has adopted additional Oregon-only rules that exceed the federal requirements:

• Outdoor production application restrictions (OAR 437-004-6405): where the label does not require the handler to use respiratory protection and the application is by air blast, is aerial, or uses a spray quality smaller than medium, workers and labor housing occupants must either remain inside an enclosed agricultural structure or evacuate the AEZ, which extends 100 feet from the application equipment and lasts until 15 minutes after the equipment passes. People not on paid status, and labor housing occupants, must be permitted to evacuate.
• Related Oregon-only rules: OAR 437-004-6406 (pesticide spray drift and innovative methods), OAR 437-004-6508 (respiratory protection) and OAR 437-004-6509 (emergency eye-washes and eye flushing supplies).
• Field Sanitation Rules: Dedicated flush or chemical toilet facilities and separate handwashing stations must be provided within 1/4 mile of all field workers.
• Cholinesterase Monitoring Best Practices: Oregon OSHA recommends baseline and periodic red blood cell (RBC) and serum cholinesterase biomonitoring for handlers regularly applying toxicity Category I and II organophosphates and carbamates to detect chronic subclinical depression before acute cholinergic toxicity occurs.
• Interagency Complaint Investigations: When drift, off-target exposure, or worker poisonings occur, Oregon OSHA and the Oregon Department of Agriculture (ODA) execute joint forensic investigations, sampling residues, auditing 3-year spray logs, and issuing coordinated administrative civil penalties under ORS Chapter 634 and ORS Chapter 654.

3. Where the Supplies Must Actually Be

Distance is not the only placement rule. For handlers, decontamination supplies must be available at the mixing and loading site and, separately, on or near the application equipment — because those are the two points at which a handler is most likely to be splashed, and neither is helpful if the water is a quarter of a mile away at the shop.

Two further conditions the WPS imposes on the water itself: it must be of a quality and temperature that is safe for washing and for flushing eyes, and it must not itself be contaminated. Water drawn from a tank that also serves as a spray-rig fill point does not qualify.

Where the label requires protective eyewear, the handler must have eye-flush water immediately available — at least one pint carried on the person or on the equipment — so that flushing can begin within seconds rather than after a walk back to the decontamination site.

4. Employer-Provided PPE and Its Care

Under the WPS the employer, not the handler, is responsible for the personal protective equipment the label requires:

• Provide it, in clean and operating condition, and inspect it before each day of use;
• Ensure it is worn and used correctly;
• Clean and maintain it, and store it separately from personal clothing and away from pesticides;
• Take steps to prevent heat illness while PPE is worn, which in a Willamette Valley July is a real and recurring duty;
• Provide a place to wash up and change at the end of the exposure period, and not allow contaminated PPE to be taken home.

Handlers must also be given, and be able to use, a clean change of clothing kept in a sealed container at the decontamination site — the point being that a handler who has been drenched can strip contaminated coveralls immediately rather than wearing them home.

5. Timing: When Decontamination Has to Happen

The rule the exam tests is that decontamination is not an end-of-shift activity. Handlers must wash before eating, drinking, using tobacco or using the toilet, and immediately after any splash, spill or glove failure. At the end of the exposure period the handler washes thoroughly and changes clothing. The reason is dermal: pesticide left on the skin continues to be absorbed for as long as it stays there, so the time between contact and washing is itself part of the dose.