JOB HAZARD ANALYSIS Construction of Open Concrete Formed Channel
| TASK: Construction of Open Concrete Formed Channel (Types 2a and 2b) | Date: August 23, 2006 | |||||
| No | ACTIVITY | HAZARD | RISK | CONTROL MEASURES TO MINIMISE / ELIMINATE RISK | RESPONSIBLE PERSON | |
| 1 | Service location survey | Manual handling operations (MHO’s) | Work related upper limb disorders. Musculoskeletal injuries. Cuts, abrasions. Foot / toe injuries | Maximum use of equipment to reduce need for MHO’s MHO Training prior to any work being carried out, this training is to be documented Wearing of gloves Wearing of safety shoes | ||
| Extreme heat | Dehydration, heat exhaustion. Heat stroke | Ready supply of cold water and Oral rehydration products ie Salt & Dextrose tablets. No work to be conducted under the sun between 12:00 & 15:00 (July & August only) | ||||
| Venomous Snakes / insects | Potentially lethal bites | Work areas to be checked visually prior to any works being undertaken. Operatives will be shown what constitutes a potentially lethal insect / snake. | ||||
| 2 | Marking out of excavation | Use of hand tools | Cuts, abrasions, broken bones, eye injuries | Supervisor to inspect hand tools prior to commencement of works to ensure tools are in good condition. Site minimum PPE to be worn at all times | ||
| Marker paint | COSHH related injuries | Paint to be COSHH assessed prior to use and COSHH assessment finding to be implemented prior to use of any such paint. | ||||
| 3 | Excavation | People working in excavation | Engulfment, entrapment. Asphyxia, death | Excavation works will be constantly monitored by an authorized and competent person throughout the works. Entry to the excavation will only be allowed after the competent person present has signed an inspection record form stating that the excavation is safe for the entry of operatives. The competent person will inspect the excavation daily prior to any works within the excavation. Effective rescue procedures will be rehearsed at least monthly or more frequently if the churn of staff so dictates. Tool box talk will be given prior to any works being done.( See attached TBT on excavation) All excavations will be conducted under a permit to break ground. Adequate ventilation will be present or arranged. Detection equipment will be present before entry to check on levels of oxygen and presence of toxic or explosive substances. The area will be tested before entry and continually during the presence of persons in the excavation. In a case of the detection equipment sounding an alarm all personal are to leave the excavation. No person is to be more than 25meters from an escape route. | ||
| Manual Handling | Work related upper limb disorders. Musculoskeletal injuries. Cuts, abrasions | Maximum use of equipment to reduce need for MHO’s MHO Training prior to any work being carried out, this training is to be documented Wearing of gloves Wearing of safety shoes | ||||
| People falling into excavation | Engulfment, entrapment. Asphyxia, death | The excavation will be protected on all sides by a fixed barrier which will be highly visible and will be illuminated in the hours of darkness. Warning boards will be erected on all sides of the excavation. Effective rescue procedures will be rehearsed at least monthly or more frequently if the churn of staff so dictates. | ||||
| Dust | Poor visibility, respiratory Injuries Dust explosion | The area will be wetted prior to the works and thereafter at a frequency sufficient to suppress windblown dust In the event that the dust suppression proves ineffective operatives will be issued suitable RPE. However in the event that dust causes restricted vision, operatives will be removed from the excavation until such time as adequate visibility is restored. | |||
| Shovel of excavator or load dropping inadvertently | Injuries to persons in area | No person will work within the traversing arc of an excavator | |||
| Material falling from excavator shovel | Injuries to persons in area | No person will work within the traversing arc of an excavator | |||
| Extreme heat | Dehydration, heat exhaustion. Heat stroke | Ready supply of cold water and Oral rehydration products ie Salt & Dextrose tablets. No work to be conducted under the sun between 12:00 & 15:00 (July & August only). In the event that natural airflow is restricted, industrial air movers will be employed. No worker shall work within the excavation for longer than 40 minutes without a ten minute break in a shaded area which will be provided for this purpose. | |||
| Collapse of excavation | Engulfment, entrapment. Asphyxia, death | Excavation works will be constantly monitored by an authorized and competent person throughout the works. Entry to the excavation will only be allowed after the competent person present has signed an inspection record form stating that the excavation is safe for the entry of operatives. The competent person will inspect the excavation daily prior to any works within the excavation. Access & egress points will be maintained throughout the works. No person to work more than 25 meters from an escape route. Evacuation exercises will be rehearsed at least monthly or more frequently if the churn of staff so dictates. | |||
| Contact with underground services | Explosion or asphyxia. Loss of airport services | A full and comprehensive services survey will be conducted prior to the works commencing. All (services relevant) information will be obtained from the client prior to works commencing. Work near to known buried services will be conducted by hand. Staff will be briefed on how to recognise the possible buried services that may be encountered. | |||
| Contaminated land / soil | COSHH Related injuries | Staff will be briefed on the potential contaminants their nature, the hazards and how to recognise them. A process will be implemented that causes operatives who suspect by sight or smell any such contaminants to be present to report any such suspicion to the competent person present. The competent person on being informed of any contaminate will assume the substance to be hazardous and reassign the workers to a place of safety until the suspected substances have been examined by a competent person specialising in Toxic or harmful substances. | |||
| Equipment falling into excavation | Injuries to operatives in the excavation | A physical barrier will be erected 2 metres from the excavation edge. No vehicles will be allowed closer than 2 metres from the excavation edge. Equipment and stores will not be stockpiled any closer than two metres from the edge of the excavation edge. |
| Blood born pathogens (BBPs’) | BBP Related injuries | Staff will be briefed on the potential contaminants their nature, the hazards and how to recognise them. A procedure will be implemented that causes operatives who suspect by sight or smell any such contaminants to be present to report any such suspicion to the competent person present. The competent person on being informed of any contaminate will assume the substance to be hazardous and reassign the workers to a place of safety until the suspected substances have been examined by a competent person specialising in Toxic or harmful substances. | |||
| Vehicles falling into excavation | Plant related injuries. | A physical barrier will be erected 2 metres from the excavation edge. No vehicles will be allowed closer than 2 metres from the excavation edge. | |||
| Vehicle overturning | Entrapment, Crush injuries | Seat belts will be worn. Areas of extreme un-evenness will be graded as and when necessary. | |||
| Noise | Deafness, CEMP violation | Noise monitoring will be conducted to measure noise as required by the CEMP. Proactive measures will be taken to reduce noise SFAIRP. Hearing protection will be available on request to all exposed staff should the TWA Noise level reach 80dBa. Hearing protection will be mandatory if the TWA background noise reaches 85dBa. | |||
| Unplanned vehicle movements | Plant on plant incidents. Pedestrian injuries | A strict Plant / Vehicle and operative / pedestrian separation regime will be enforced. | |||
| Flooding | Drowning | Excavation works will be constantly monitored by an authorized and competent person throughout the works. Entry to the excavation will only be allowed after the competent person present has signed an inspection record form stating that the excavation is safe for the entry of operatives. The competent person will inspect the excavation daily prior to any works within the excavation. At least two access & egress points will be maintained throughout the works. Evacuation exercises will be rehearsed at least monthly or more frequently if the churn of staff so dictates. | |||
| Gas (H2S, Methane etc) | Explosion or asphyxia | Toxic, flammable gas / Oxygen / CO2 tests to be conducted prior to any trench entry using an approved, certified & calibrated gas monitoring device. Monitor to remain in position when excavation is occupied. | |||
| Lack of oxygen | Asphyxiation | Continuous monitoring, forced Air movement if necessary | |||
| 4 | Concrete pouring | Contact with concrete | Entrapment, suffocation, Chemical burns | Constant supervision. During pouring of concrete mixture, workers to be tethered to a rescue line, while wearing a full body harness. Rescue line to be adequately manned to enable an instantaneous removal from the excavation. Butyl rubber boots and gloves to be worn. COSHH Training to be delivered prior to any concrete pour | |
| 5 | Finishing of concrete bed | Use of electrical hand tools | Burst discs. Disc fragment impact injuries | Discs only to be fitted by competent staff, disc speeds not to be exceeded. Fill site PPE to be worn. In addition to suitable RPE. PEE to be fitted with a dead-mans handle / switch. | |
| 6 | Laying of Polythene sheet | Manual Handling | Work related upper limb disorders. Musculoskeletal injuries. Cuts etc | Maximum use of equipment to reduce need for MHO’s MHO Training prior to any work being carried out, this training is to be documented Wearing of gloves Wearing of safety shoes | |
| 7 | Marking of concrete bed | Use of hand tools | Cuts, abrasions, broken bones, eye injuries | Supervisor to inspect hand tools prior to commencement of works to ensure tools are in good condition. Site minimum PPE to be worn at all times. Preferably the marking out should be done by chalked line (Pinged) |
| Prepared by:- | Authorised by:- Signature | |
| D L Woods ESH Manager AAJ-JV Date: August 23, 2006 | Date |
| TASK:__________________________________________________________________ | Date: ___________________ | ||
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All Employees are to sign below in recognition and understanding of this JHA content
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Md Abu Zaed Khan
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