COSHH - UVC and Ozone Disinfection

COSHH RISK ASSESSMENT FORM

Ultraviolet-C and Ozone Sterilisation Device

HAUS OF ÄSTHETIK

Location: 4 Portland Square, Water Street, Bakewell, Derbyshire, DE45 1HA, United Kingdom

Date of Assessment: 1st April 2025 Review Date: 1st April 2026 Assessed By: Managing Director

1. Substance/Equipment Information

  • Product Name: 200W Dual-Action UV-C & Ozone Room Steriliser

  • Manufacturer: 

  • Supplier: 

  • COSHH Safety Data Sheet Available? ☑ Yes ☐ No

  • Wavelengths:

    • UV-C: 254 nm (germicidal wavelength for DNA/RNA disruption)

    • Ozone-generating: 185 nm (ozone production spectrum)

  • Technology: Ultraviolet germicidal irradiation (UVGI) and ozone-based air purification

  • Auto Safety Mechanism: Infrared motion detector auto shut-off if human presence is detected during operation

2. Purpose of Use

  • Location of Use: Clinical treatment rooms, waiting area, reception, and toilet facilities.

  • How is it used?

    • Operated nightly or in response to known or suspected contamination risk.

    • Used to sterilise enclosed, unoccupied rooms via UV-C and ozone.

  • Who is Exposed?

    • Practitioners, cleaning staff, and patients if not properly controlled.

  • Frequency of Use: Daily (60-minute cycle at close of business) or as needed.

3. Hazard Identification

  • Hazard Classification:

    • ☑ Irritant (ozone inhalation)

    • ☑ Mutagenic (UV-C exposure)

    • ☑ Harmful if inhaled (ozone in high concentrations)

  • Potential Hazards:

    • Eye or skin injury from direct UV-C exposure

    • Respiratory irritation from ozone accumulation

    • Material degradation (rubber, silicone, plastics) from ozone

    • Electrical fault/fire hazard if misused

  • Symptoms of Exposure:

    • UV-C: Erythema (skin redness), photokeratitis ("welder's flash"), skin burns

    • Ozone: Coughing, throat irritation, dizziness, metallic or chlorine-like smell

4. Risk Control Measures

A. Storage & Handling

  • ☑ Keep device unplugged when not in use

  • ☑ Store in a clean, dry, low-dust environment

  • ☑ Do not tamper with auto shut-off sensors

B. Use Protocol

  • ☑ Device must only be operated in unoccupied rooms

  • ☑ Duration per treatment: 60 minutes for room size 5m x 4m

  • ☑ Use during close of business or after known contamination event

  • ☑ Room must be vented post-treatment:

    • 5–10 minutes (low wind)

    • 30 minutes (good ventilation or sunny weather)

  • ☑ If ozone smell remains (metallic/bleach-like), vent for another 10–20 minutes

  • ☑ Avoid use near rubber or exposed silicone devices

C. Personal Protective Equipment (PPE)

  • ☑ No PPE required during correct usage (device must be operated in unoccupied rooms only)

  • ☑ If venting manually: wear nitrile gloves and a Type IIR mask if residual ozone scent is strong

5. Emergency Procedures

  • UV-C Overexposure:

    • Leave area immediately

    • Flush exposed skin or eyes with cold water

    • Seek medical attention if symptoms persist

  • Ozone Inhalation:

    • Move to fresh air

    • Monitor breathing and seek medical advice if irritation or symptoms persist

6. Maintenance & Record-Keeping

  • ☑ Weekly visual inspection of lamp and sensor functionality

  • ☑ Annual servicing by the manufacturer or approved technician

  • ☑ Log every use of the device:

    • Date/time

    • Duration

    • Operator name

    • Post-treatment ventilation completed

  • ☑ Malfunctions must be reported and logged

7. Risk Assessment Summary

  • Overall Risk Level (After Controls Applied): ☑ Low

  • Are current controls sufficient? ☑ Yes ☐ No

  • Additional Control Measures Required? ☐ Yes ☑ No

8. Monitoring & Training Requirements

  • ☑ All staff must be trained in:

    • Proper operation of the UV/Ozone steriliser

    • COSHH awareness regarding ozone

    • Emergency response procedures

  • ☑ Annual refresher training required

9. Sign-Off

Assessor Name: Owen Dickinson
Role: Managing Director
Signature: ___________________
Date: 1st April 2025