Health theme of the month
Post on 04-Jun-2015
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LEGIONELLA – AN OFFSHORE UXB?
Ron Gardner & Darrin Hawkes
WHAT I WON’T TALK ABOUT!
DETAILS OF WHAT YOU NEED TO DO FOR THE ASSESSMENT AND CONTROL OF LEGIONELLA RISKS
THERE IS PLENTY OF GUIDANCE OUT THERE
HSE GUIDANCE
HSE ACOP AND GUIDANCE L8 (THE LCI PRECIS OF L8 IS USEFUL)
HSE AUDIT CHECKLIST AND VIDEO
OIL & GAS UK ENVIRONMENTAL HEALTH GUIDELINES
ENERGY INSTITUTE GUIDANCE ON LEGIONELLA
INDUSTRY GUIDANCE
NIPH POTABLE WATER GUIDELINES FOR OFFSHORE
GUIDANCE FOR OTHER SECTORS SUCH AS HOTELIERS
OTHER GUIDANCE
WHAT I DO WANT TO TALK ABOUT
WHERE HAWKES ASSOCIATES HAVE SEEN FLAWS IN THE MANAGEMENT OF POTABLE WATER OFFSHORE
WHAT TO DO ABOUT THEM
01 ASSESSMENT
PROBLEM
No or poor assessmentsRecommendations not carried through
SOLUTION
Obvious!
02 THE RESPONSIBLE PERSON
PROBLEM
No one appointedResponsible person has no authority
SOLUTION
Appoint one!Define their authority as well as their responsibilityMake sure they are competent (also ask them)
03 AGING INFRASTRUCTURE
PROBLEM
Old systems; often poorly maintainedNew players
SOLUTIONS
Good maintenanceKeep the P&IDs up-to-dateRemoval of dead legs or flush weekly
04 DOSING AND DISINFECTION
PROBLEM
Erratic manual dosingUV treatmentCleaning and disinfection only in an emergency
SOLUTION
Consider automatic dosing (ClO2 controls biofilm well)
Is UV enough?Clean & disinfect on a regular basis
05 SAMPLING – WHAT AND WHY?
PROBLEM
SamplingLegionella What does a one off mean?Biofilm sampling Instant tests
SOLUTIONS
Should be meaningful and interpretableControl supported by measurement – not vice versa
06 LEGIONELLA AND POTABLE WATER
PROBLEM
Often treated as if independent
SOLUTION
Holistic approach
07 USING INFORMATION
PROBLEM
Ignoring what simple available information can tell you:
Sampling results used as traffic light systemOccasional changes in taste are ignored
SOLUTION
Trend results from water analysisRemember biofilm affects taste - investigate
08 WHEN IT GOES WRONG
PROBLEM
Everyone rushes to superchlorinateOn its own its not the solution
SOLUTION
Follow L8Heating and cleaning firstCheck/remove deadlegs
FINAL COMMENT
CONTROL, CONTROL and CONTROL!
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