6.3 Worker Protection Standard (WPS) Compliance, Notification & Decontamination

Worker Protection Standard (WPS) Compliance, Notification & Decontamination

Core Principle: The Worker Protection Standard (WPS), codified at 40 CFR Part 170, is a comprehensive federal regulation administered by the EPA designed to reduce the risk of pesticide poisonings, chemical burns, and occupational illnesses among agricultural workers and pesticide handlers. WPS imposes strict legal duties on agricultural employers, commercial pesticide handler employers (CPHE), and agricultural facility managers across farms, forests, nurseries, and enclosed greenhouses.

In Arizona, agricultural production is concentrated in high-intensity cropping systems—such as Yuma County winter vegetables, Maricopa and Pinal county cotton, alfalfa, and grain, and commercial citrus groves—where hand-labor harvesting and mechanized chemical applications occur in close geographic proximity. Full compliance with WPS training, central notification hubs, Application Exclusion Zones (AEZ), and field decontamination protocols is vital for operational safety and legal compliance.

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WPS Scope: Covered Employers and Employee Classifications

WPS applies to any establishment involved in the commercial production of agricultural plants. The regulation defines two distinct classes of covered employees based on their operational duties:

                               WPS COVERED PERSONNEL
                                         │
        ┌────────────────────────────────┴────────────────────────────────┐
        ▼                                                                 ▼
AGRICULTURAL WORKERS                                        PESTICIDE HANDLERS
• Hand weeding, thinning, pruning, & harvesting             • Mixing, loading, transferring, or applying
• Irrigating crops & moving hand-move pipe lines            • Cleaning, adjusting, or repairing application rigs
• Operating tractors in non-treated fields                  • Handling unrinsed containers or mix tanks
• Must receive Worker WPS Training                          • Early-entry into treated areas during REI
• Minimum 1 gal clean water at decontam station             • Must receive Handler WPS Training + Respirator fit
• Prohibited from entering fields under active REI          • Minimum 3 gal clean water + eye-flush station

1. Agricultural Workers

Individuals employed for compensation who perform hand labor tasks in fields, forests, nurseries, or greenhouses treated with pesticides or under an active Restricted-Entry Interval (REI). Tasks include hand harvesting, weeding, pruning, tying, thinning, and manual irrigation management.

2. Pesticide Handlers

Individuals employed for compensation who directly interact with pesticide chemicals and application equipment. Handler tasks include:

• Mixing, loading, transferring, or applying pesticides.
• Cleaning, adjusting, repairing, or servicing pesticide application equipment, hoses, nozzles, and tanks.
• Handling open pesticide containers or disposing of empty pesticide packaging.
• Entering a treated area during an active REI to perform crop monitoring or specialized early-entry activities.
• Flagging for aerial spray planes or operating chemigation injection systems.

Early-Entry Workers: Workers permitted under narrow exceptions to enter a treated area during an active REI (e.g., to perform critical irrigation repairs or emergency frost protection) must receive complete handler-level PPE, full hazard notification, specialized training, and decontamination supplies.

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Mandatory Annual WPS Safety Training

Under EPA WPS standards, employers must ensure all agricultural workers and pesticide handlers complete EPA-approved safety training before performing tasks in treated areas:

                             WPS TRAINING REQUIREMENTS
                                         │
     ┌───────────────────────────────────┼───────────────────────────────────┐
     ▼                                   ▼                                   ▼
TRAINING FREQUENCY                  QUALIFIED TRAINERS                  RECORDKEEPING (2 YEARS)
• Mandatory ANNUALLY (every 12 mos) • Certified Applicators             • Worker/Handler full name & signature
• NO grace period permitted         • EPA-approved Train-the-Trainers   • Training date & EPA approval number
• Delivered in understandable lang  • Designated state-certified agency • Trainer name & employer business name

• No Grace Period: Training must be completed before a worker enters a treated area where an REI has been in effect within the last 30 days, or before a handler performs any handling task.
• Approved Curriculum: Training must use EPA-approved materials (such as official WPS videos or manuals) presented orally or visually in a language the employee understands.
• Trainer Credentials: Instructors must be currently certified as applicators of restricted use pesticides, complete an EPA-approved "Train-the-Trainer" course, or be designated by state regulatory authorities.
• 2-Year Record Retention: Employers must maintain complete training records for at least two (2) years from the training date. Records must record: the employee's printed name and signature, date of training, EPA approval number of the training materials, trainer's name and qualification credential, and the agricultural employer's business name.

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Central Information Display Hub

Agricultural employers must establish a Central Information Display at a prominent, easily accessible location on the agricultural establishment (e.g., main shop, labor dispatch area, or central packing shed) where workers and handlers can inspect documents 24 hours a day without asking permission.

                       CENTRAL INFORMATION DISPLAY HUB
                                      │
     ┌────────────────────────────────┼────────────────────────────────┐
     ▼                                ▼                                ▼
EPA WPS SAFETY POSTER               EMERGENCY MEDICAL INFO           PESTICIDE APPLICATION LOG
• Official EPA-approved poster      • Nearest medical facility name  • Product brand name & EPA Reg No
• Displays 2015 safety revisions    • Physical street address        • Active ingredient(s) & REI duration
• Emergency washing guidance        • Direct telephone number        • Specific crop & treated location
• Anti-retaliation protections      • 911 / EMS dispatch protocols   • Start & End application date/time

Application Log Display Timelines

• Posting Window: Pesticide application details must be posted before the application begins (or no later than 24 hours after application completion).
• Display Duration: The application log and corresponding Safety Data Sheets (SDS) must remain posted continuously throughout the entire REI and for at least thirty (30) days after the REI expires.
• Archival Mandate: Once removed from the central board, employers must retain the pesticide application records and SDS on file for two (2) years and make them immediately accessible to workers, handlers, or treating medical personnel upon request.

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Field Notification Rules: Warning Signs vs. Oral Warnings

To prevent accidental entry into treated areas during chemical applications and REIs, employers must provide clear advance notification:

                         WPS NOTIFICATION PROTOCOLS
                                     │
     ┌───────────────────────────────┴───────────────────────────────┐
     ▼                                                               ▼
POSTED FIELD WARNING SIGNS                                  ORAL NOTIFICATION WARNINGS
• Required if label specifies "Post Warning Signs"           • Required if label specifies "Oral Warning"
• Mandatory for greenhouses if REI > 4 hours                • Given in an understandable language/manner
• Mandatory for outdoor fields if REI > 48 hours            • Details location, treated crop, REI timeframe,
• Standard skull-and-crossbones symbol                        & explicit instructions not to enter
• Posted at all normal field entry points                   • Delivered before chemical application commences

Standard WPS Field Warning Sign Specifications

• Design: Standard EPA-compliant sign featuring a stylized skull-and-crossbones symbol with the mandatory wording: "DANGER - PESTICIDES - KEEP OUT / PELIGRO - PESTICIDAS - NO ENTRE" in English and Spanish (or other relevant languages).
• Placement: Posted at all normal points of worker entry, field borders adjacent to labor paths, and corners of treated plots.
• Timing: Signs must be posted no more than 24 hours before the application begins, remain posted throughout the entire REI, and be removed or covered within three (3) days after the REI expires.

Double Notification Mandate

Certain highly toxic pesticides—particularly Category I organophosphates, carbamates, and fumigants—contain explicit label language stating: "Notify workers of the application by warning them orally and by posting warning signs at entrances to treated areas." When this label statement appears, the employer is legally mandated to provide BOTH posted field signs and direct oral warnings (Double Notification).

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Application Exclusion Zones (AEZ)

The Application Exclusion Zone (AEZ) is an active safety buffer zone surrounding outdoor mobile pesticide application equipment during application to protect workers and bystanders from direct spray contact and drift.

                      APPLICATION EXCLUSION ZONE (AEZ)
                                      │
     ┌────────────────────────────────┴────────────────────────────────┐
     ▼                                                                 ▼
100-FOOT AEZ BUFFER                                          25-FOOT AEZ BUFFER
• Aerial spraying (airplane, helicopter)                     • Ground boom applications (nozzles <= 12 in above canopy)
• Air-blast sprayers (orchards, citrus, vineyards)           • Medium or coarser droplet sprays (VMD >= 294 microns)
• Fumigant soil injections & space treatments                • Low-drift directed foliar ground equipment
• Fine/ultra-fine spray mists (VMD < 294 microns)            • Surrounds moving rig during active spraying

Handler's Mandatory Suspension Duty

Under WPS AEZ rules, the pesticide applicator/handler has an affirmative legal duty: The applicator MUST immediately suspend the pesticide application if any person (other than trained, equipped handlers) enters the Application Exclusion Zone. Spraying cannot resume until all individuals have vacated the exclusion zone.

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Decontamination Supplies & Emergency Medical Transportation

Agricultural employers must supply fully equipped decontamination stations to ensure rapid removal of pesticide residues from skin and eyes:

Station Location Rules: Decontamination supplies must never be placed inside a pesticide-treated area or an area under an active REI. Supplies must be positioned together in a clean, accessible location outside the hazard boundary.

Emergency Eye Flushing Requirements

When handlers work with Category I or II pesticides where the label requires protective eyewear, the employer must provide an emergency eyewash dispenser capable of providing at least 0.4 gallons per minute for 15 minutes (or continuous plumbed/gravity-fed clean water) at the mixing/loading site. Furthermore, each handler must carry at least one pint of emergency eye flush water immediately available on their person or on the application rig.

Mandatory Emergency Medical Transportation

If an agricultural worker or handler is poisoned or injured by pesticide exposure during employment, the employer has a strict legal obligation to:

1. Provide Prompt Transportation: Immediately transport the affected person to an emergency medical facility or hospital.
2. Provide Exposure Information to Physicians: Deliver the following vital documents to the treating medical personnel:
   • The product Safety Data Sheet (SDS).
   • The exact Product Brand Name, EPA Registration Number, and Active Ingredient(s).
   • The specific circumstances of the application and details of how exposure occurred.