1 On 4 December 2002, Mr Graeme Richardson, an apprentice plumber was assisting Mr Matthew Campbell, a qualified plumber employed by Eveready Plumbing and Maintenance Pty Limited ("the defendant") to repair a leaking water pipe at a residential town house complex at 16 Hillcrest Drive, Quakers Hill, New South Wales. Mr Richardson was under the defendant's direction and supervision but was not employed by the defendant.
2 The leaking water pipe was located in an excavation which had been dug into the driveway of the premises. While Mr Richardson was using oxyacetylene equipment in the excavation there was an explosion comprising an eruption of air and dust followed by a fireball emanating from the excavation.
3 Mr Richardson sustained burns to his face, back, right elbow and legs.
4 The defendant, who has pleaded guilty, was prosecuted by Inspector Clampett under s 8(2) of the Occupational Health & Safety Act 2000 ("the Act").
5 This judgment deals with the penalty that should be imposed upon the defendant.
6 In an amended application for order, the prosecutor alleged:
On 4 December, 2002 the defendant, being an employer, failed to ensure the health or safety of persons other than the defendant's employees and, in particular, Graeme Richardson, were not exposed to risks arising from the conduct of the defendant's undertaking while they were at the defendant's place of work contrary to Section 8(2) of the Occupational Health & Safety Act, 2000.
Particulars
(a) On 4 December 2002 the defendant directed Matthew Campbell and Graeme Richardson to repair a leaking water pipe at 16 Hillcrest Drive, Quakers Hill, NSW ("the premises"). Matthew Campbell was a plumber employed by the defendant. Richardson was an apprentice plumber under the defendant's direction and supervision but was not employed by the defendant.
(b) The repair to the leaking water pipe was in an excavation, which had been dug into the driveway of the premises ("the excavation"). The excavation was approximately 0.8 by 0.8 metres wide at the surface. The depth of the excavation was around 1.2 metres and variable. Beneath the surface, the excavation was up to 1.5 metres in width.
(c) Live services including electricity, communications and, in particular, gas, were exposed within the excavation within the vicinity of the leaking water pipe. These services were not isolated before commencing work to repair the leaking water pipe.
(d) Under Matthew Campbell's supervision, Graeme Richardson entered the excavation and used oxyacetylene equipment to cut and solder the water pipe.
(e) While Richardson was using oxyacetylene equipment in the excavation, there was an explosion comprising an eruption of air and dust followed by a fireball emanating from the excavation.
(f) As a result of the explosion, Graeme Richardson sustained burns to his face, back, right elbow and legs.
(g) In these circumstances the defendant:
(i) failed to properly assess the risks of using oxyacetylene equipment to cut and solder the water pipe in the excavation;
(ii) failed to ensure that exposed services in the excavation including communications, electricity and, in particular, gas were properly isolated before oxyacetylene equipment was used.
7 An agreed statement of facts was tendered which provided the following information:
7. On 4 December 2002 Richardson was working under the direct supervision of Campbell.
8. On 4 December 2002 Richardson and Campbell were directed by the defendant to undertake a plumbing job at 16 Hillcrest Avenue, Quakers Hill, New South Wales ("the premises"), a residential townhouse complex. The job required them to repair a water pipe in a driveway excavation.
9. The repair to the leaking water pipe was in an excavation, which had been dug into the driveway of the premises (the excavation) by another employee of the defendant prior to Richardson and Campbell attending the premises. The excavation was approximately 0.8 by 0.8 metres wide at the surface. The depth of the excavation was around 1.2 metres and variable. Beneath the surface, the excavation was up to 1.5 metres in width.
10. Live services including electricity, communications and, in particular, gas, were exposed within the excavation in the vicinity of the leaking water pipe.
11. At approximately 8.30 am on 4 December 2002 Campbell and Richardson attended the premises. They located the excavation which was covered and barricaded in the driveway of the premises.
12. They removed the barricades and covers and assessed the job. They discussed the possible risks involved with the job. They noted that there were electrical, gas, water and Telstra services in the excavation. They considered that they could cut and weld the water pipe without cutting the other services located in the excavation.
13. Following his and Richardson's assessment of the site, Campbell completed a risk assessment form. He did not identify the live services in the excavation as a potential risk to health and safety, or the need to isolate the other services within the excavation whilst the repair work to the water pipe was being undertaken. The risk assessment form completed by Campbell was a generic document which was not site specific. The document did include a section titled "will you need to lock/tag out today? (isolate energy sources)" however this section was not completed by Campbell. The document also contained general reference to fire protection and electrical isolation.
14. Whilst Campbell was completing the risk assessment, Richardson prepared the job site. He further excavated around the part of the water pipe to be repaired to allow better access.
15. Campbell and Richardson advised the residents of the premises that the water would be turned off whilst they fixed the pipe. They turned the water off prior to commencing the repairs however did not isolate the other services before commencing work to repair the leaking water pipe.
16. Under his supervision, Campbell, allowed Richardson to conduct the repairs to the water pipe exposed in the excavation, which involved carrying out oxyacetylene welding.
17. Richardson entered the excavation and cut out the damaged section of the water pipe. Campbell prepared a replacement section for the water pipe and then gave it to Richardson to install.
18. Richardson then commenced using oxyacetylene equipment to silver solder the replacement section of the water pipe into place. Richardson completed silver soldering a section of the water pipe. He turned off the oxyacetylene equipment, and he then used a mirror to check the integrity of the underside of the silver soldered joint. He determined that he needed to place more silver solder on the underside of the pipe. Richardson then reignited the oxyacetylene equipment. He then proceeded to recommence silver soldering the pipe, at this point there was an explosion comprising an eruption of air and dust followed by a fireball emanating from the excavation.
19. Richardson suffered burns to his face, back, right elbow and legs as a result of the explosion. Following the incident Richardson was assisted by Campbell out of the excavation and placed in a toddlers pool in front of the premises whilst Campbell sought assistance.
20. It was noticed by Campbell following the incident that there was a flame coming from the gas line. Campbell then isolated the gas line and the flame ceased.
21. Richardson stated "at all times the flame (from the oxyacetylene equipment) was pointing away from the gas pipe" and that he considered "there was enough distance between the pipes so that his work would not affect the gas pipe".
22. WorkCover were notified of the incident shortly after it occurred. Inspector Adam Clampett attended the site on the day of the incident and issued Prohibition Notice no. 146978 and Improvement Notice no. 255233 upon the defendant. The Notices required the defendant to assess risks associated with working in excavations around existing services and to implement and maintain control measures by isolating services when undertaking further work. The Notices also required the control measures to be incorporated into a revised safe work method statement.
23. Richardson had six weeks off work as a result of his injuries and then returned to work on full duties.
24. Prior to the incident the defendant provided staff with an Occupational Health and Safety Handbook which documented generic work procedures to be followed by employees. Whilst the document included procedures for working in excavations and with welding equipment, it did not provide details of safe work methods or procedures relating to safe work and isolation when working in excavations around essential services such as gas and electricity.
25. The defendant's procedures and work method statements for working in excavations in place at the time of the incident, did not identify the risks of working in the vicinity of live services, including the risk of electrocution or shock from electricity, the risk of explosion or asphyxiation from gas or the risk of flooding from water. Nor did the risk assessment carried out by Campbell identify the potential risks.
26. Prior to the incident Campbell had received confined space training.
27. Following the incident the defendant revised it (sic) safe work method statement for working in excavations that contain domestic services, to include a requirement to isolate services. The defendant issued a notice to employees and subcontractors in relation to assessing risks when working in excavations around existing services. The notice included a requirement that all services that exist in the excavation area must be isolated.
28. Following the incident the defendant also revised the manner in which it treated work in excavations. All excavations in which the persons head at any stage will be below the surrounding surface are now treated as confined spaces and only persons appropriately trained in confined spaces are allowed to undertake this work. This work is also only to be undertaken after direct consultation with management of the defendant.
29. The defendant has no prior convictions.
30. The defendant has at all times co-operated fully with the WorkCover Authority.
8 The following documents were exhibited to the agreed statement of facts: