Identity

A chemical sanitation system used for spraying the chassis and wheels of vehicles entering the farm. It is positioned at the primary vehicle entry point of the CAZ.

Overview

Vehicle Disinfection Spray targets the chassis and wheels of transport vehicles to mitigate pathogens carried on tires. The vehicle disinfection station uses a high-pressure wash system to break up and remove organic materials, followed by the application of chemical sanitizers.

Structured Facts

Classification

Chemical Sanitation / Vehicle Sanitation. Structural and operational biosecurity measure.

Purpose

Mitigates pathogens on transport tires. Removes viral and bacterial pathogens in the soil, mud, and manure that adhere to tires, wheel wells, and chassis.

Standard Procedures

To maximize contact and ensure coverage, the spray sequence must start from the bottom up—beginning with the undercarriage, tires, and wheel wells before moving to the upper body of the vehicle. In cases of heavy mud, a manual pre-wash or automated high-pressure rinse is required before the sanitizing spray is applied.

Sanitation & Disinfection

Uses chemical sanitizers such as Virkon S (Potassium Peroxymonosulfate) or Sodium Hypochlorite (Bleach).

Entry & Exit Protocols

Positioned at the primary vehicle entry point of the Controlled Access Zone (CAZ).

Monitoring & Compliance

Auditors must check the operating pressure daily to ensure it remains within the target range of 2500 to 3000 PSI. Nozzles must be inspected weekly for mineral scale buildup or clogs that could disrupt the spray pattern.

Advantages

Helps prevent external pathogens from entering the farm, protecting livestock populations and reducing the risk of costly disease-related losses.

Limitations

The effectiveness of the vehicle spray system depends on physical cleanliness; heavy mud can shield pathogens from the disinfectant. In sub-zero temperatures, water lines are prone to freezing, blocking the disinfectant flow.

Safety & Regulatory Requirements

The wash area must be constructed from reinforced concrete with sloped drainage to capture wash water, preventing environmental contamination and ensuring that the disinfectant is not diluted by standing pool water.

Quantitative Data

• Contact Time: 10 min (Virkon S), 15 to 20 min (Sodium Hypochlorite/Bleach)
• Dilution Ratio: Up to 40% propylene glycol added to water lines in cold climates
• Concentration: 1.0% solution (Virkon S), 0.1% active chlorine (Sodium Hypochlorite/Bleach)
• Frequency: Daily pressure checks, weekly nozzle inspections
• Temperature: Sub-zero temperatures require antifreeze or thermal heat blankets
• Unit:
  • Minimum Effective Channel Length: 15 to 20 m
  • Hydraulic Spray Nozzle Pressure: 2500 to 3000 PSI
  • Disinfection Tank Capacity: 1000 to 2000 L

Relationships

• Diseases: Foot-and-Mouth Disease (FMD), Highly Pathogenic Avian Influenza (HPAI)
• Government Guidelines: Department of Animal Husbandry and Dairying (DAHD), World Organisation for Animal Health (WOAH)