❓ A parliamentary question regarding HCN levels and safety issues at the Kalgoorlie Consolidated Gold Mines (KCGM) CIL plant in 1990, including the company's response and the Department's oversight. The Minister confirms the issues and outlines the actions taken at the time.
AnsweredQoN 555Legislative Council
QuestionView source ↗
I refer to a letter I understand is dated December 5 1990 signed by A W Extract, District Mining Engineer addressed to the Registered Manager - Metallurgy, Kalgoorlie Consolidated Gold Mines titled ‘HCN LEVELS ON CIL PLANT- GIDGI ROASTER’ and copy of a record book entry dated December 3 1990 signed by Special Inspector of Mines -
(1) Was the above referred to letter sent to the company?
(2) If not, why not?
(3) Is it correct that part of the letter states ‘A recent inspection of the above operation on the December 3 1990 discovered levels of HCN significantly above the TLV of 10ppm. The readings were taken by one of your portable, hand held monitors as we were walking over the top of tanks 1B and 1C. The levels indicated a reading in excess of 20ppm while over tank 1C and although we were informed of the high reading by your plant operator prior to our inspection the levels recorded appear to occur regularly in tanks 1A, 1B and 1C …’?
(4) If not, will the Minister table a copy of the entire letter?
(5) If yes to (3), can the Minister state what short and long term measures were implemented to maintain the HCN level in the CIL plant to the maximum TLV of 10ppm?
(6) Is it correct that the record book entry referred to above in part states ‘I have today carried out an inspection of your roaster, CIL plant and workshop. The following defects were observed -
(a) Roaster #1 burner port has a leak and noxious fumes are being released;
(b) Tank 1B and 1C of the CIL plant had HCN levels in excess of the maximum TLV of 10ppm. Tank 1C recorded a HCN level in excess of 20ppm;
(c) A Bennetts - Day Crew Operator - was observed not wearing safety glasses while preparing samples at the sample preparation area of the CIL plant; and
(d) Clean up of concentrate spillage was being conducted during this inspection. Housekeeping levels around the site are generally good’?
(7) If not, will the Minister table a copy of the record book entry?
(8) If yes to (6), were all the defects rectified to ensure that they did not occur again to create an unsafe working environment for any of the workers?
(1) Was the above referred to letter sent to the company?
(2) If not, why not?
(3) Is it correct that part of the letter states ‘A recent inspection of the above operation on the December 3 1990 discovered levels of HCN significantly above the TLV of 10ppm. The readings were taken by one of your portable, hand held monitors as we were walking over the top of tanks 1B and 1C. The levels indicated a reading in excess of 20ppm while over tank 1C and although we were informed of the high reading by your plant operator prior to our inspection the levels recorded appear to occur regularly in tanks 1A, 1B and 1C …’?
(4) If not, will the Minister table a copy of the entire letter?
(5) If yes to (3), can the Minister state what short and long term measures were implemented to maintain the HCN level in the CIL plant to the maximum TLV of 10ppm?
(6) Is it correct that the record book entry referred to above in part states ‘I have today carried out an inspection of your roaster, CIL plant and workshop. The following defects were observed -
(a) Roaster #1 burner port has a leak and noxious fumes are being released;
(b) Tank 1B and 1C of the CIL plant had HCN levels in excess of the maximum TLV of 10ppm. Tank 1C recorded a HCN level in excess of 20ppm;
(c) A Bennetts - Day Crew Operator - was observed not wearing safety glasses while preparing samples at the sample preparation area of the CIL plant; and
(d) Clean up of concentrate spillage was being conducted during this inspection. Housekeeping levels around the site are generally good’?
(7) If not, will the Minister table a copy of the record book entry?
(8) If yes to (6), were all the defects rectified to ensure that they did not occur again to create an unsafe working environment for any of the workers?
AnswerView source ↗
Answered
16 May 2002
Responded by
Parliamentary Secretary representing the Minister for State Development
Response time
37 days
(b) Tank 1B and 1C of the CIL plant had HCN levels in excess of the maximum TLV of 10ppm. Tank 1C recorded a HCN level in excess of 20ppm; (c) A Bennetts - Day Crew Operator - was observed not wearing safety glasses while preparing samples at the sample preparation area of the CIL plant; and (d) Clean up of concentrate spillage was being conducted during this inspection. Housekeeping levels around the site are generally good’?
(c) A Bennetts - Day Crew Operator - was observed not wearing safety glasses while preparing samples at the sample preparation area of the CIL plant; and (d) Clean up of concentrate spillage was being conducted during this inspection. Housekeeping levels around the site are generally good’?
(d) Clean up of concentrate spillage was being conducted during this inspection. Housekeeping levels around the site are generally good’?
(1) Yes. (2) Not applicable. (3) Yes. (4) Not applicable. (5) KCGM acknowledged receipt of the letter dated 5th December 1990 in a response dated 27 December 1990. Short term measures implemented by the company included the mandatory use of full face respirators, warning signs being displayed to inform employees of the safety requirements and the access gate to the CIL area remaining closed to prevent unauthorised access. The long term measures proposed included a process circuit change to address the factors which were viewed as being responsible for the high HCN levels being experienced at the time. (6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(2) Not applicable. (3) Yes. (4) Not applicable. (5) KCGM acknowledged receipt of the letter dated 5th December 1990 in a response dated 27 December 1990. Short term measures implemented by the company included the mandatory use of full face respirators, warning signs being displayed to inform employees of the safety requirements and the access gate to the CIL area remaining closed to prevent unauthorised access. The long term measures proposed included a process circuit change to address the factors which were viewed as being responsible for the high HCN levels being experienced at the time. (6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(3) Yes. (4) Not applicable. (5) KCGM acknowledged receipt of the letter dated 5th December 1990 in a response dated 27 December 1990. Short term measures implemented by the company included the mandatory use of full face respirators, warning signs being displayed to inform employees of the safety requirements and the access gate to the CIL area remaining closed to prevent unauthorised access. The long term measures proposed included a process circuit change to address the factors which were viewed as being responsible for the high HCN levels being experienced at the time. (6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(4) Not applicable. (5) KCGM acknowledged receipt of the letter dated 5th December 1990 in a response dated 27 December 1990. Short term measures implemented by the company included the mandatory use of full face respirators, warning signs being displayed to inform employees of the safety requirements and the access gate to the CIL area remaining closed to prevent unauthorised access. The long term measures proposed included a process circuit change to address the factors which were viewed as being responsible for the high HCN levels being experienced at the time. (6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(5) KCGM acknowledged receipt of the letter dated 5th December 1990 in a response dated 27 December 1990. Short term measures implemented by the company included the mandatory use of full face respirators, warning signs being displayed to inform employees of the safety requirements and the access gate to the CIL area remaining closed to prevent unauthorised access. The long term measures proposed included a process circuit change to address the factors which were viewed as being responsible for the high HCN levels being experienced at the time. (6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(c) A Bennetts - Day Crew Operator - was observed not wearing safety glasses while preparing samples at the sample preparation area of the CIL plant; and (d) Clean up of concentrate spillage was being conducted during this inspection. Housekeeping levels around the site are generally good’?
(d) Clean up of concentrate spillage was being conducted during this inspection. Housekeeping levels around the site are generally good’?
(1) Yes. (2) Not applicable. (3) Yes. (4) Not applicable. (5) KCGM acknowledged receipt of the letter dated 5th December 1990 in a response dated 27 December 1990. Short term measures implemented by the company included the mandatory use of full face respirators, warning signs being displayed to inform employees of the safety requirements and the access gate to the CIL area remaining closed to prevent unauthorised access. The long term measures proposed included a process circuit change to address the factors which were viewed as being responsible for the high HCN levels being experienced at the time. (6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(2) Not applicable. (3) Yes. (4) Not applicable. (5) KCGM acknowledged receipt of the letter dated 5th December 1990 in a response dated 27 December 1990. Short term measures implemented by the company included the mandatory use of full face respirators, warning signs being displayed to inform employees of the safety requirements and the access gate to the CIL area remaining closed to prevent unauthorised access. The long term measures proposed included a process circuit change to address the factors which were viewed as being responsible for the high HCN levels being experienced at the time. (6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(3) Yes. (4) Not applicable. (5) KCGM acknowledged receipt of the letter dated 5th December 1990 in a response dated 27 December 1990. Short term measures implemented by the company included the mandatory use of full face respirators, warning signs being displayed to inform employees of the safety requirements and the access gate to the CIL area remaining closed to prevent unauthorised access. The long term measures proposed included a process circuit change to address the factors which were viewed as being responsible for the high HCN levels being experienced at the time. (6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(4) Not applicable. (5) KCGM acknowledged receipt of the letter dated 5th December 1990 in a response dated 27 December 1990. Short term measures implemented by the company included the mandatory use of full face respirators, warning signs being displayed to inform employees of the safety requirements and the access gate to the CIL area remaining closed to prevent unauthorised access. The long term measures proposed included a process circuit change to address the factors which were viewed as being responsible for the high HCN levels being experienced at the time. (6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(5) KCGM acknowledged receipt of the letter dated 5th December 1990 in a response dated 27 December 1990. Short term measures implemented by the company included the mandatory use of full face respirators, warning signs being displayed to inform employees of the safety requirements and the access gate to the CIL area remaining closed to prevent unauthorised access. The long term measures proposed included a process circuit change to address the factors which were viewed as being responsible for the high HCN levels being experienced at the time. (6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(6) Yes. (7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(7) Not applicable. (8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
(8) The defects identified were recorded by the Inspector in the mine record book at the mine for action by the manager of the mine. Under the terms of the (now repealed) Mines Regulation Act 1946 which was in force at the relevant time, the manager was responsible (ref. Section 30 of the Act) for enforcing the observance of all the provisions of the Act and all of the Regulations applicable to the mine under his charge. The manager was required to rectify any defects noted by the Inspector or otherwise appeal against the determination made by the Inspector. The Department of Mineral & Petroleum Resources does not have any record of correspondence from KCGM indicating that the specific individual matters recorded in the record book on this occasion were rectified other than the letter of 27 December 1990 referred to above. However, there is no record of any appeal with respect to compliance made with regard to the defects raised. The mines safety inspectorate of the then Department of Mines (predecessor to the former Department of Minerals and Energy and the present Department of Mineral and Petroleum Resources) regularly made visits to mines on an ongoing basis for the purpose of ensuring compliance with then current regulatory requirements.
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