Standard Operating Procedure (SOP)

Here’s a detailed Standard Operating Procedure (SOP) for the Operating Procedure of a Fogster-ULV Fogger Machine, typically used for disinfection in pharmaceutical, food, healthcare, or cleanroom environments.

1.0 Objective

To lay down the procedure for the proper and safe operation of the Fogster-ULV (Ultra Low Volume) Fogger Machine used for area disinfection and decontamination.

2.0 Scope

This SOP applies to the operation of the ULV Fogger Machine used in production, warehouse, and cleanroom areas at [Company Name].

3.0 Responsibility

4.0 Definitions

• ULV Fogging: Disinfection method that uses a machine to generate ultra-fine droplets (less than 50 microns) of disinfectant to sanitize air and surfaces.

• Disinfectant: Approved chemical used for fogging, e.g., Hydrogen Peroxide + Silver Nitrate, QAC, etc.

5.0 Materials and Equipment Required

• ULV Fogger Machine (Fogster or equivalent)

• Approved disinfectant solution

• Measuring cylinder or beaker

• Distilled or purified water (if dilution required)

• PPE: gloves, goggles, face mask/respirator, coverall

• “Area Under Fumigation” signage

• Timer or stopwatch

• Cleaning logbook

6.0 Procedure

6.1 Pre-Operation Checks

1. Ensure the fogger is clean and in good working condition.

2. Verify that the disinfectant to be used is approved and within validity.

3. Ensure the area is cleared of personnel, exposed materials, and equipment not suitable for fogging.

4. Display “Area Under Fumigation” signage outside the entry door.

5. Close all windows, doors, and air handling units (if applicable).

6.2 Fogger Preparation

1. Prepare the disinfectant solution as per SOP or manufacturer’s dilution guidelines.

2. Pour the required volume of disinfectant into the fogger tank using a measuring container.

3. Set the fogger nozzle direction (typically upward and away from walls).

4. Plug in the machine and place it centrally or in a suitable location based on area layout.

6.3 Fogging Operation

1. Switch ON the fogger machine.

2. Adjust the flow rate as per area size and disinfectant specification (typically 5–15 ml/min).

3. Exit the area immediately and close the door securely.

4. Allow the fogger to run for the calculated duration (based on m³ coverage rate).

5. Post fogging, allow the contact/dwell time (usually 30–60 minutes).

6. Re-enter the area with proper PPE if needed to switch off the unit or open ventilation.

7. Resume HVAC system or air changes as per protocol.

7.0 Post-Operation

1. Clean the fogger tank and nozzle with purified water.

2. Dry and store the machine in a designated clean storage area.

3. Record the activity in the Fogging Logbook.

4. Remove the “Fumigation in Progress” signage and update status.

8.0 Safety Precautions

• Always wear PPE during preparation and handling of disinfectants.

• Do not point the fogger nozzle directly at electrical panels or sensitive equipment.

• Do not stay in the room while fogging is in progress.

• Ensure good ventilation after fogging.

9.0 Documentation

Log the following in the Fogging Record Sheet:

• Date & time of fogging

• Area name and volume (in m³)

• Disinfectant used & concentration

• Contact time

• Operator name and signature

• Supervisor verification

10.0 Abbreviations

• SOP: Standard Operating Procedure

• ULV: Ultra Low Volume

• PPE: Personal Protective Equipment

• QA: Quality Assurance

• EHS: Environment, Health & Safety

11.0 Annexures

• Annexure 1: Fogging Activity Log Sheet

• Annexure 2: ULV Fogger Machine Checklist

• Annexure 3: Dilution Chart for Disinfectants (if applicable)

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