2.4 Personal Protective Equipment Selection & Care

2.4 Personal Protective Equipment Selection & Care

Personal Protective Equipment (PPE) serves as the primary barrier between a pesticide applicator and the chemical hazards they face. The selection, proper use, and maintenance of PPE are not just best practices—they are legal requirements dictated by the pesticide label. Wearing inadequate PPE can lead to severe poisoning, while using unapproved materials can sometimes be worse than wearing no protection at all.

Minimum PPE vs. Label-Specified PPE

The pesticide label explicitly lists the minimum PPE required for handling, mixing, loading, and applying the product. Applicators must remember that the label dictates the minimum legal requirement. You are always permitted, and often encouraged, to wear more protection than the label requires, but you can never legally wear less.

For example, if the label requires a long-sleeved shirt, long pants, shoes, and socks, you are legally permitted to wear a full chemical-resistant suit instead. However, if the label mandates chemical-resistant gloves, you cannot substitute them with cotton or leather gloves under any circumstances.

The required PPE may differ depending on the task. Mixing and loading typically present the highest risk of acute exposure because the applicator is handling the concentrated pesticide. Therefore, the label may require a chemical-resistant apron, face shield, and specific gloves for mixing and loading, but only standard PPE for the actual application of the diluted mixture.

Chemical-Resistant Materials

When a label specifies "chemical-resistant" PPE, it means the material must prevent any measurable amount of the pesticide from moving through it during the period of use.

Acceptable Materials: Most chemical-resistant garments are made from specialized plastics or rubbers. Common effective materials include:

• Butyl rubber
• Nitrile rubber
• Neoprene
• Barrier laminate (often used for highly toxic solvents)
• Polyvinyl chloride (PVC)

Unacceptable Materials: Materials that absorb liquids are strictly prohibited when chemical resistance is required. This includes cotton, leather, and canvas. Leather gloves or canvas boots act like sponges, soaking up the pesticide and holding it directly against the skin, continuously exposing the applicator long after the initial contact. Unless a label specifically directs otherwise (which is exceedingly rare), never wear leather gloves or leather boots when applying liquid pesticides.

Glove Selection Categories (A-H)

The EPA uses a standardized Glove Selection Chart to help applicators choose the correct glove material. Pesticide labels often specify a chemical resistance category (A through H) based on the specific solvents used in the formulation.

For example, a label might state: "Wear chemical-resistant gloves made of any waterproof material (Category A)." This indicates a relatively mild formulation where standard nitrile, neoprene, or PVC gloves are adequate.

Conversely, a label might state: "Wear chemical-resistant gloves such as barrier laminate or butyl rubber (Category F)." Category F indicates a highly aggressive solvent base that will quickly degrade or permeate lesser materials like standard latex or PVC. In these cases, only high-end chemical-resistant materials like barrier laminate or heavy-duty butyl rubber provide adequate protection.

Applicators must consult the EPA Chemical Resistance Category Selection Chart and match the label's required category to the correct glove material and thickness (usually a minimum of 14 mils).

Eye Protection

Protecting the eyes is critical, especially when mixing and loading concentrates or applying sprays overhead. The label will specify the type of eye protection required:

• Safety Glasses: Acceptable only if they have front, brow, and temple protection. Standard prescription eyeglasses or sunglasses are never an acceptable substitute for safety glasses.
• Chemical Splash Goggles: Required when there is a risk of splashing or when dealing with liquids that cause severe eye irritation. Goggles provide a tight seal around the eyes.
• Face Shield: Often required during mixing and loading, a face shield protects the entire face from splashes. However, a face shield alone does not fully protect the eyes from vapors or fine mists. In high-risk situations, safety goggles are often worn underneath a face shield.

Respirator Types and Requirements

When inhalation risks are significant, the label will require a respirator. Choosing the correct respirator and maintaining it is a complex but essential task.

Particulate Filters vs. Chemical Cartridges

• Particulate Filters: These trap dusts, mists, and solid particles. The National Institute for Occupational Safety and Health (NIOSH) classifies them into three series based on oil degradation:

  • N-Series (Not oil-resistant): Use only where no oil is present in the air.
  • R-Series (Oil-resistant): Can be used for up to 8 hours when oil is present.
  • P-Series (Oil-proof): Can be used for extended periods even when oil is present. The efficiency is rated as 95, 99, or 100 (e.g., an N95 or a P100 filter).

• Chemical Cartridges: These contain activated carbon or other sorbents to absorb toxic gases and vapors. A common requirement for pesticide applicators is an Organic Vapor (OV) cartridge (typically color-coded black). Cartridges have a limited lifespan and must be replaced according to the manufacturer's instructions or whenever the applicator detects a smell or taste, whichever comes first.

Fit Testing and Medical Clearance

Under OSHA and EPA Worker Protection Standard (WPS) rules, an employer cannot simply hand a respirator to an employee. Before an applicator can legally wear a tight-fitting respirator, two steps must occur:

1. Medical Evaluation: A physician must certify that the applicator is physically healthy enough to withstand the restricted breathing caused by the respirator.
2. Fit Testing: The respirator must be rigorously tested on the specific individual to ensure a perfect, airtight seal around the face. Facial hair (beards, heavy stubble) is strictly prohibited where the respirator seals to the face, as it compromises the fit and allows toxic vapors to bypass the filters.

PPE Laundering and Decontamination

PPE must be meticulously cleaned and maintained to prevent cumulative exposure.

Laundering Reusable Clothing:

• Always wash pesticide-contaminated clothing separately from the family laundry to prevent cross-contamination.
• Pre-rinse the clothing outdoors or in a utility tub.
• Wash in small loads using hot water and the highest water level setting.
• Use a heavy-duty liquid detergent.
• Run the washing machine through at least one additional empty cycle with detergent and hot water to clean the machine before washing regular clothes.
• Line dry the clothing if possible; sunlight helps break down many pesticide residues. If using a dryer, avoid high heat to prevent permanent setting of residues.

Heavily Contaminated Clothing: If clothing becomes heavily saturated with an undiluted, highly toxic pesticide (Category I or II), do not attempt to wash it. It must be placed in a plastic bag and safely discarded as household hazardous waste. The risk of laundering heavily contaminated gear is too high.

Cleaning PPE: Reusable gloves, boots, and goggles should be washed with soap and water before taking them off, and then thoroughly washed again inside and out after removal.