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Table 2 Power generation workers: similar exposure groups, cumulative exposures and job tasks (n = 5284; 94% of the total group). Evaluable data on specific job tasks were available in 70% (n = 3696) of the 5284 workers with usable data

From: Retrospective exposure assessment to airborne asbestos among power industry workers

Exposure group n (%) Ageg Exposedh Fibre- Revisionsk Removalk Sprayingk Gasketsl Packsl Matsl Gaugesl Wiresl
   (years) (years) years i (%) m (%) m (%) m (%) m (%) m (%) m (%) m (%) m
Metalworkera 1600 (30) 54 (12) 21 (11) 79 (195) 75 28 7 65 56 37 46 5
Electricianb 652 (13) 52 (12) 20 (11) 33 (132) 63 11 1 16 7 12 18 67
Plant operatorc 1588 (30) 56 (12) 20 (10) 26 (77) 51 24 4 28 23 27 21 6
Other craftsmand 601 (11) 52 (11) 18 (10) 21 (70) 47 17 2 24 19 22 17 14
Supervisore 210 (4) 57 (10) 19 (10) 27 (99) 43 12 2 14 12 13 11 9
Other occupationf 633 (12) 59 (11) 21 (10) 22 (74) 50 14 4 22 19 19 21 12
Total 5284 (100) 56 (12) 20 (11) 42 (134) 59 21 4 36 30 26 28 15
  1. a including welder, insulator, mechanic
  2. b including communications technician
  3. c including system controller, boiler operator
  4. d for example roofer, pipefitter, car mechanic, mason, gauge mechanic, turner, smelter, fire fighter, driver, painter, warehouseman, forklift operator
  5. e present in the contaminated area, but not executing manual work, for example civil engineer, work planner
  6. f for example security personnel, office staff, receptionist
  7. g age at fixed reference date 1 September 2002, standard deviation in parentheses
  8. h periods of asbestos exposure from self administered data sheets, standard deviation in parentheses
  9. i cumulative asbestos exposure calculated for a standard airborne concentration of 1 × 106 fibres per cubic metre, standard deviation in parentheses
  10. k actively involved in revision of steam turbines, particularly removal of asbestos lagging and spraying of asbestos pulp
  11. l tooling and handling of asbestos containing gaskets, packings and gauges, removal of asbestos mats, maintenance of heat resistant wires
  12. m percent of exposure group with evaluable data executing specific job task