3 At the hearing set down to deal with the plea, the parties were able to tender a detailed Agreed Statement of Facts. As all the essential ingredients of the offence are dealt with in that document it is appropriate that its terms be set out in this judgment. The Agreed Statement of Facts stated as follows:
1. At all material times the Informant was an inspector duly appointed and empowered by section 48 of the Occupational Health and Safety Act 1983 to institute proceedings in this matter.
2. At all material times the Defendant was a self-employed person conducting business as Banana Coast Truck/Trailer Repairs and Towing Service and had a principal place of business at Pacific Highway, Wells Crossing, Grafton in the State of New South Wales.
3. At all material times the Defendant carried on general truck repairs, towing and salvage work from a workshop located at his place of business at Halfway Creek via Grafton.
4. At all material times the Defendant contracted with Michael Redwood to carry out repair work on a truck cabin at his place of business at Pacific Highway, Halfway Creek via Grafton.
5. On 1 February 2000 the Defendant was attempting to test a hydraulic cylinder for leaks of (sic) using a compressor to pump air into the hydraulic cylinder whilst working at the premises. Prior to testing the hydraulic cylinder alternations (sic) had been made to it. When testing the hydraulic cylinder it exploded soon after the air was connected. The end section of the hydraulic cylinder was propelled a distance of approximately fix to six metres. Whilst being propelled the hydraulic cylinder hit Michael Redwood.
6. As a result of the hydraulic cylinder hitting Michael Redwood he suffered a dislocated thumb, a fracture to the tibia and fibula and left ankle and cuts and lacerations to his left leg.
7. On 16 February 2000 Inspector Plowright and Senior Inspector Garry Sandall of the Workcover Authority of NSW attended the Defendant's principal place of business at Pacific Highway, Wells Crossing, Grafton in the State of New South Wales. The Inspectors observed:
(a) At the premises there was a workshop. The workshop was portal frame clad with zincalum sheeting, four open bays with trucks in each in various states of repair and a large shed joining onto the right end. Above the middle bay was a yellow sign with white and black writing which bore the words "Banana Coast Towing";
(b) After entering the premises the Inspectors were shown through an open doorway and into a side bay. A large lathe was situated to their left and was about two metres from the back wall. All of the surrounding walls were lined with shelves which had on them engine parts for trucks. Directly in front was a large table which was piled high with an assortment of truck parts and a large bed mattress. Under the table were crammed motor vehicle parts and other odds and ends;
(c) Over the back of the table was a space of about 2 metres long by one metre to the back and side walls. In this space there was a drill press. There was also a green painted air compressor which stood 1200mm high and 910mm long and 450mm wide. The air compressor was lined up against the wall. The Defendant told the Inspectors that this was the air compressor used to pressurise the hydraulic cylinder which gave rise to the prosecution;
(d) The air compressor and the electric motor to drive it were mounted on top of a cylindrical receiver. This was supported by four angle bar legs welded to the knuckle radius of the dished ends, two at either end with flat bar feet to the side of the angle bar. The receiver was cylindrical in shape and measured 910mm by 450mm in diameter with dished ends inserted and fillet welded into each end;
(e) On the dish and end closest to the drill press were a number of marking which had metal stamped into it;
(f) A plastic sticker was fixed under the stamp referred to in the previous paragraph which read "Ray Chilton, Boiler Pressure Vessel, Accredited Inspection Service Registration No. 183.0.7800 Hazard Level DP 000 Litres 120 Certified Pressure 000Kpa Inspection Date 9/2/2000;
(g) At the other end of the dished end was mounted a pressure gauge with graduated markings 0 to 200 psi. The gauge was filled with a liquid which was used so as to prevent shock (the liquid was presumed to be glycerine which is usually used in such a way);
(h) There were not visible markings to identify the manufacturer or the markings as required by the pressure vessel regulations to Australian Standard AS12101997;
(i) At the back of the workshop a hydraulic cylinder with a dished end attached was sitting in some long grass. The Defendant indicated that this was part of the hydraulic cylinder which had exploded;
(j) There was a name plate attached to the shell of the hydraulic cylinder which was inscribed with a hard metal stamp;
(k) The vessel was domed shaped with two dents 50 mm apart and running across the knuckle radius up to a coupling identified as "G" at one end and open at its other extremity. There was observed material which appeared consistent with weld marks which extended around the circumference of its open extremity;
(l) The vessel appeared to be made from carbon steel material and was cylindrical in shape. Its dimensions were approximately 375mm in length plus 120mm for the dish end with an inside diameter of 600mm and a wall thickness of 3mm;
(m) Three fittings were located at the upper dome section of the vessel which penetrated its walls through two by 10mm welding couplings - one of which was identified as "G" and the other of which was 50mm welded half coupling into its inner area;
(n) The coupling marked "G" had a brass fitting screwed into it which appeared to have been broken off flush level with the outside of the coupling. The other 10mm coupling had a pipe attached to the inside bent 90 degrees to the shell wall and these two couplings were 180 degrees apart and 65mm in from the outer edge;
(o) The shell had 1 by 50mm half coupling 200mm from the welded circumferential on the same centre line as the 50mm coupling in the dome end which was 120mm in from the edge of the dome;
(p) At the time of inspection the flat end plate was unable to be located.
8. At the time that the Inspectors inspected the premises the compressor was unplugged and not in use. The Inspectors issued a Prohibition Notice no. 108499 against the air receiver which had not been certified by a competent person.
9. On 2 February 2000 Inspector Parfitt of the Workcover Authority issued to the Defendant Prohibition Notice no.117281 because the compressor had not been tested and no guard was fitted to the vee belts at the premises. The Prohibition Notice required the Defendant to have the compressor tested and to fit a guard to the vee belt.
10. On 2 February 2000 Inspector Parfitt of the Workcover Authority issued Improvement Notice No. 210449 to the Defendant stating that persons were not to be exposed to the risk of injury to do (sic) falls from heights while accessing and egressing the mezzanine area in the workshop. The Improvement Notice required the Defendant to provide and maintain safe and adequate means of access and egress to and from the mezzanine area in the workshop. The Defendant's attention was drawn to Australian Standard 1657 of 1992.
11. As a result of the investigation Inspector Price concluded that:
(a) the Defendant had carried out alterations to the hydraulic cylinder at the premises by cutting it shorter and welding another piece of metal onto the end of the hydraulic cylinder;
(b) the effect of the modifications and the method used by the Defendant to test for leaks caused the end of the hydraulic cylinder to be propelled the five or six metres across the workshop as soon as or shortly after compressed air was introduced to the hydraulic cylinder;
(c) the Defendant had admitted that the cylinder that he was testing would not be required to work under pressure when it was installed on the truck;
(d) there was no need for the Defendant to use compressed air to rest the cylinder to see if their (sic) were any leaks;
(e) the Defendant had a safer alternative of using water or oil instead of compressed air for testing the cylinder for leaks;
(f) Michel (sic) Redwood was working as sub-contractor and not an employee at the time of the accident.
12. Section 65A of the Factories, Shops and Industries Act 1962 requires that when testing for leaks using air the testing must be carried out so that the method being used was not harmful to persons in the vicinity. In addition the Boiler and Pressure Vessel Regulation made under the provisions of the Factories, Shops and Industries Act 1962 requires at Regulation 18 that every pressure vessel subject to pressure by air must have a suitable safety valve fitted to prevent the vessel being worked at a pressure greater then (sic) the maximum allowable safe working pressure of the pressure vessel.
13. On 1 February 2000 at his premises located at Pacific Highway, Halfway Creek via Grafton in the State of New South Wales the Defendant failed to ensure that persons not in his employment and in particular Michael Redwood were not exposed to a risk to their health or safety arising from the conduct of the Defendant's undertaking while persons were at his place of work in that the Defendant:
(a) carried out pneumatic pressure testing of a hydraulic cylinder in a manner that was inherently unsafe;
(b) carried out alternations (sic) to a hydraulic cylinder which made the hydraulic cylinder inherently unsafe for pneumatic pressure testing;
(c) failed to ensure that the pneumatic pressure testing of the hydraulic cylinder was carried out in a manner which did not expose other persons to a risk to their health and safety.
14. The Defendant has no prior convictions under the Occupational Health and Safety Act 1983 or the associated legislation.
4 The prosecutor also tendered, without objection, ten coloured photographs which depicted the hydraulic tank and the end section of the hydraulic tank which, in effect, was under pressure, blown across the workplace and injured Mr Redwood. The photographs gave some indication of the general work area and the scene of the accident. There was also a coloured photograph showing the extensive injury to Mr Redwood's left leg.