Risk Evaluation of Identified Hazards

RISK ASSESSMENT No RA 005-C Page 1 of 2

Work Activity:

Work adjacent to or within evaporative condensers  Thornliebank Industrial Estate Glasgow G46 8JW Site/Location: Tel: 0141 638 7916 Fax: 0141 638 8111 Various site locations

Those at Risk Y/N Comments - enter names or general groups Star Employees: Y Star commissioning, service and maintenance engineers Other workers: N General Public: N Comments:

The only route of entry into the body for legionella is by breathing water aerosol that contains the bacterium. Therefore, the main control measures in this assessment concentrate on eliminating the risk (kill the bacterium using a good water treatment regime in accordance with the ACOP L8, controlling the risk at source by preventing the aerosol (switch off plant, pumps and fans) then in the unlikely event of any remaining risk the final level of protection a barrier or PPE (respirator). The above controls are in accordance with the recommended hierarchy set out in the Management of Health and Safety at Work Regulations 1999 Regulation 4.

Hazards

1. Legionnaires' disease (contracted by breathing aerosol of infected water) 2. Other waterborne organisms such as algae, amoebae and other bacteria 3. Falls greater than 2m 4. Entanglement within rotating fans or pulleys 5. Slips on wet or algae/moss covered surfaces

Control Measures (existing or planned) Control Details PPE: 1. Safety boots 2. Overalls, 3. Full face or half mask respirator fitted with a P3 filter cartridge all to EN136 (Note: a combination filter K2 P3 (K2 ammonia, P3 particulates/aerosols) will provide protection against both ammonia gas and aerosols containing bacteria) Equipment: 1. Ladders may be required for access to the upper parts of the condenser 2. Rope to tie off the ladder 3. Lock-off device for the electrical supply Information, 1. Ensure that the condenser has a regular documented water treatment regime in place. If it Instruction, and does not, do not approach the condenser. Report the situation to your supervisor. Training 2. Turn off plant, fan/s and pump/s (isolate and lock off) before close inspection of the internal condition of the condenser. 3. Wear the specified respirator when checking the water distribution of a running condenser 4. Wash your hands before eating, drinking or smoking. Supervision: Branch managers must 1. Ensure that a site-specific assessment is carried out where this assessment does not cover all of the hazards on an individual site. Environment; 1. Take care, when working in the vicinity of a condenser as the floor and surfaces may be wet or covered in algae/moss making them slippery. Procedures, N/A documents etc Communications: 1. Before turning off plant ensure that the owner is aware. 2. Remember that condensers can be positioned in remote parts of the site ensure that someone knows where you are working and when to expect you back. Emergency No special requirements action/procedures Access: 1. For prolonged or regular access to the top surface of a condenser edge protection or an access platform must be provided. Where this is not available a work at height risk assessment must be undertaken to determine if personal fall prevention equipment can be safely utilised. RISK ASSESSMENT No RA 005-C Page 2 of 2

2. Where a fixed safety ladder or staircase does not exist use a footed and or tied ladder for access to the upper parts of the condenser (refer to RA002).

Risk Evaluation of Identified Hazards Likelihood Highly unlikely = 1 Unlikely = 2 Likely = 3 Severity Slightly harmful = 1 Harmful = 2 Extremely harmful = 3 (Likelihood x Severity = Risk level) 1 = Trivial, 2 = Tolerable, 3-4 = Moderate, 6 = Substantial, 9 = Intolerable Identified Hazards (base scores on existing or planned control measures) Triv' Tol' Mod' Sub' Int'

1. Legionnaires' disease 1x3 3 2. Other waterborne organisms such as algae, amoebae, other bacteria 1x2 2 3. Falls greater than 2m 1x3 3 4. Entanglement within rotating fans or pulleys 1x2 2 5. Slips on wet or algae/moss covered surfaces 1x2 2

Note: Moderate scores; Thought should be given to reducing risk, but the cost and time requirements of prevention should be carefully considered and limited. Substantial: Work should not be started until the risk has been reduced, for work in progress, urgent action is required. Considerable resources may have to be allocated. Intolerable: If unlimited resources cannot reduce risk, work will be prohibited.

Is risk adequately controlled using the above control measures Y/N YES If "NO" State further action required State further action required:

Note : This risk assessment is only valid when all control measures are in place before the work or activity commences and will be reviewed 04/04/2016 or earlier if the nature of the work changes or there is a dangerous occurrence.

Assessor: (Print) C Haslam (Sign) Date 04/04/2011