1 This prosecution is brought by Inspector Madeline Christensen of the WorkCover Authority of New South Wales against Cymetar No. 2 Pty Ltd, (the defendant) under s8(1) of the Occupational Health and Safety Act 2000 (the Act), by way of an amended Application for Order.
2 It is alleged the defendant on 21 December 2003 contravened s8(1) of the Act in that it failed:
to ensure the health, safety and welfare at work of all of the employees of the Defendant, in particular, Craig Anderson.
3 It is alleged the defendant, in particular:
(a) failed to undertake a proper risk assessment of the ammonia refrigeration system at the site;
(a) failed to ensure that employees, including Craig Anderson, did not undertake any repair work on the ammonia refrigeration system that gave rise to a risk of release of ammonia gas;
(a) failed to provide and maintain proper emergency procedures at the site regarding a possible ammonia gas release from the ammonia refrigeration system and failed to properly instruct and train employees in such procedures;
As a result of these failures, Craig Anderson was exposed to the risk of injury from ammonia gas escaping from the ammonia refrigeration system at the site, and suffered serious injury when such ammonia gas escaped.
4 The defendant pleads guilty to the charge.
5 Mr P.M. Skinner of counsel appeared for the prosecution and Mr M.P. Cahill of counsel appeared for the defendant. The prosecution relied upon an agreed statement of facts, photographs, factual inspection report, the prior conviction record of the company, death certificate, associated medical records and a victim impact statement.
6 The defendant tendered a relevant metal cap. Also relied upon was an affidavit of Mr Brian Andrews, General Manager, P & M Quality Smallgoods Pty Limited, which operates Cymetar No 2 Pty Limited, an abattoir site. A number of relevant documents were attached to Mr Andrews' affidavit including documents in relation to the investigation of the incident; the upgrading of the Cymetar abattoir; relevant equipment and occupational health and safety policies, pre-existing and post, the incident. Also tendered was an affidavit of Mr Bradley John Hunt, Operations Manager of P & M Quality Smallgoods Pty Limited, who opined as to the role of a company identified as Gordon Bros which company had entered into a working relationship with the defendant as outlined below.
7 The Agreed Statement of Facts relevantly reads:
4. At all material times, P & M Quality Smallgoods Pty Limited (ACN 002 781 142)(" P&M ") was a company incorporated in New South Wales with its registered address at Level 2, 580 George Street, Sydney New South Wales. At all material times, P&M owned and operated an abattoir located at Muffett Street, Scone in the State of New South Wales (" the Site "). At all material times, Cymetar was a member of the P&M Quality Smallgoods Group of companies and was a related company to P&M in that it shared common Directors with P&M.
5. At all material times, Cymetar employed Craig Anderson (" Anderson ") to work at the Site. Anderson was employed as a Leading Hand Electrician whose duties included maintaining electrical apparatus and refrigeration equipment at the Site. Anderson had been employed with Cymetar from approximately 17 January 2000.
6. At all material times, Dirluck (No.2) Pty Ltd (ACN 101 812 613) ( "Dirluck" ) was the trustee of a trust known as Homebush Unit Trust (" HUT ") being a trust created on 30 August 1996. At all material times, Dirluck was a member of the P&M Quality Smallgoods Group of companies.
7. At all material times, Dirluck employed Wayne Thompson (" Thompson ") to work at the site as a Maintenance Manager. Thompson had been employed by HUT since approximately 14 January 2000 with his overall duties being to oversee the maintenance of plant and equipment at the Site. Thompson was Anderson's supervisor.
8. P&M purchased the abattoir in January 2000.
9. When P&M purchased the abattoir in January 2000, the refrigeration system had three separate parts using ammonia, freon and glycol, respectively, as the refrigerant. Ammonia was used to refrigerate and freeze small stock. Freon was used to refrigerate and freeze beef and cattle product. Glycol was used to refrigerate the working areas, such as the boning rooms.
10. Cymetar retained a company known as Gordon Brothers Industries Pty Limited (ACN 005 888 175) (" Gordon Brothers ") to service the refrigeration plant, including the provision of quarterly site inspection visits, servicing of the refrigeration plant and a 24-hour callout service in relation to the ammonia refrigeration system.
11. Prior to the incident date, the Defendant had failed to undertake a proper risk assessment of the ammonia refrigeration system at the site.
12. On the incident date, both Thompson and Anderson went to the Site in response to an alarm from the refrigeration system. This was part of their usual duties to respond to such alarms. Anderson arrived before Thompson. Anderson advised Thompson that there was a problem with Compressor 6 and that he had started Compressor 5 as this was a backup for Compressor 6.
13. Prior to the incident date, Thompson and Anderson carried out the day to day operation and monitoring of the refrigeration system. Thompson and Anderson also carried out some maintenance work related to both the ammonia and the glycol systems. But work on the ammonia system was limited to electrical faults regarding matters such as fans not working and other routine maintenance such as bleeding oil from receivers, changing coils and routine monitoring. Thompson and Anderson were not to carry out any maintenance work on the actual "closed" ammonia refrigeration system. For all work involving the actual "closed" ammonia refrigeration system and for all other non-routine matters, a qualified refrigeration technician at Gordon Brothers was to be contacted.
14. On the incident date, Anderson called Gordon Brothers and spoke to a Refrigeration Technician, David Moses (" Moses ") concerning the fault in the system. Moses identified the fault with Compressor 6 as being a " high discharge temperature failure ". Moses advised Anderson to double check the wiring terminations in the control panel (" the PLC ") which was outside of the refrigeration system, and also to check the electrical terminations at the top of the relevant temperature probe. The temperature probe consisted of an external top unit or housing that contained the electrical terminations referred to above, together with a sensor that was attached to the electrical terminations inside the housing and then protruded out of the base of the housing.
15. The temperature probe (" the Probe ") was a device used to monitor the temperature of the ammonia gas in the pipes of the "closed" ammonia refrigeration system at the Site. The Probe screwed into a housing/socket (" the Well ") and could be removed by unscrewing it from the Well. The Well itself was screwed into the pipe containing ammonia in the refrigeration system.
16. The Probe and the Well were designed so that the Probe could be screwed out of the Well, leaving the pipe containing the ammonia sealed. This enabled the Probe to be replaced without having to isolate and then pump the ammonia out of the relevant pipe.
17. After the incident, it was established that the screw portions that enabled the Probe to be screwed into the Well and the Well to be screwed into the pipe were threaded in the same direction. As a consequence, when attempting to unscrew the Probe from the Well, there was a risk that the Well could be unscrewed from the pipe if the nut located at the top of the thread on the Well was not properly restrained.
18. On the incident date, Anderson spoke by telephone with David Moses, a qualified technician employed by Gordon Brothers, about the fault readings he found when he arrived at the Plant.
19. When interviewed after the event, Moses stated that he told Anderson to check the wiring terminations at the PLC [that is the external control panel] and at the Probe. Moses confirmed that he told Anderson to remove the cap from the housing at the top of the Probe and to examine the electrical connections inside the housing.
20. When interviewed after the event, Anderson stated that he could not recall much about the event. Anderson stated that he could remember "… taking the cap [off the Probe] and that's all" . Anderson stated that "… the only thing that would make me think to go there would be I would have been advised by someone to go there, otherwise I wouldn't have gone near it". Anderson also stated that he had not been required to remove a temperature probe from the refrigeration system before.
21. Anderson and Thompson discussed the advice from Moses.
22. Anderson went to check the connections inside the terminal cover of the Probe. Anderson was wearing a T-shirt and shorts and running shoes. He was not wearing any personal protective equipment such as breathing apparatus or an eye mask.
23. During this time, the Probe and the Well were removed from the pipe and ammonia gas escaped.
24. There was no sign or identification on the pipeline to indicate that it contained ammonia. But, when interviewed after the event, Anderson stated that he knew the pipe contained ammonia.
25. Further, because the pipeline had not been isolated at the time and therefore ammonia had not been pumped out of the section of the pipeline into which the Well was screwed, when the Probe and Well were unscrewed from the pipe, ammonia escaped from the system.
26. At the time Anderson was checking the Probe, Thompson, his supervisor, was in the control room and he was not aware of Anderson's location or what he was doing.
27. As a result of the ammonia escape, Anderson was overcome by the fumes and collapsed.
28. Thompson initially tried to rescue Anderson by himself. Thompson was wearing a T-shirt and shorts and running shoes. He was not wearing any personal protective equipment such as breathing apparatus or an eye mask. Thompson was overcome by the effects of ammonia and could not remove Anderson from the contaminated area on his own.
29. Thompson was able to leave the area temporarily, obtain assistance from two other workers at the Site, and then return to assist to remove Anderson from the contaminated area.
30. As a result of their exposure to ammonia, both Anderson and Thompson suffered serious injuries. Anderson's injuries included burns to his face, neck, arms, underarms and damage to his lungs and eyes requiring hospitalisation and loss of memory. Thompson received burns to his throat, lungs and eyes requiring hospitalisation and a tracheotomy. Anderson died on 22 August 2006. The immediate cause of his death included respiratory failure.
31. A subsequent investigation by Gordon Brothers after the incident established that the original cause of the alarm was a faulty fuse in the PLC, and not with the Probe. The PLC was located outside the refrigeration system.
32. When interviewed after the incident, Moses stated that the procedure to be adopted for the removal of the Probe was as follows:
"Isolate the compressor electrically. Disconnect the electrical terminations on the temperature probe. Prevent the thermometer pocket from turning in socket and remove the temperature probe from the thermometer pocket."
Moses also stated that it was not necessary to isolate the ammonia prior to removing the Probe "because the temperature pocket is in place to prevent the escape of the refrigerant". He stated that it was possible to remove the temperature probe and the thermometer pocket together and that to ensure that the thermometer pocket did not come out of the socket, you would use a spanner on the pocket to prevent it from turning.
33. Neither Anderson nor Thompson was trained in this procedure.
34. Thompson and Anderson had only been trained in electronically isolating the refrigeration system from the control room and had never previously performed a pump out procedure of the ammonia refrigeration system.
35. On the incident date, Cymetar did not have in place any system for an emergency response to an ammonia leak from the refrigeration plant.
36. After the accident, the Defendant undertook an investigation into the cause of the accident. Part of that report concluded that the Well was unsafe and should be welded so as not to allow the Well to be accidentally unscrewed from the pipe whilst the Probe was being unscrewed from the Well.
37. After the accident, the Prosecutor issued a number of Improvement Notices to the P&M Quality Smallgoods Group of companies, including the Defendant. Also after the accident, the P&M Quality Smallgoods Group of companies took the following steps:
(a) Placed appropriate signage on the ammonia pipe to indicate its contents;
(b) Undertook a risk assessment in association with Gordon Brothers as to the hazards of storage, handling and use of ammonia at the site;
(c) Undertook to put in place an emergency procedure for an ammonia leak at the site and supervisors went through the procedure with employees;
(d) Produced a procedure for monitoring of Ammonia at the site;
(e) Put in place a system of performing risk assessments before work was performed on the refrigeration system
(f) Included emergency procedures and evacuation procedures in induction for employees;
(g) Prepared an induction for contractors at the site;
(h) Installed emergency evacuation alarms;
(i) Replaced Ammonia detectors;
(j) A HAZOP study report was obtained which identified further work to be undertaken on the refrigeration system to minimize the risk of exposure of injury to persons working on the refrigeration system.
Relevant Principles
8 In considering penalty, I take guidance from the reasoning of the High Court in Markarian v R (2005) 215 ALR 213 and their Honours' view that the task of sentencing must acknowledge the effect of the applicable legislative provisions (in this case s8(1) of the Occupational Health and Safety Act 2000 with ss21A, 22, 23, 34 of the Crimes (Sentencing Procedure) Act 1999). The court, using the "instinctive synthesis" approach, would include an assessment of the objective and individual subjective factors, with the appropriate weight given to each factor, and could (but not should) give a degree of deduction in penalty to some element in the consideration, in such circumstances as where it better serves the interests of transparency, which element should be narrowly confined (for example, the utilitarian value of the plea).