Safety Alert: WORKING WITH HERBICIDES SUCH AS GLYHOSATE
LSA Safety Alert 08-2016: WORKING WITH HERBICIDES SUCH AS GLYHOSATE – Worksafe Victoria has responded to recent WHO reports around herbicides such as glyphosate, and how to minimise risks to employees and others when using this chemical. For more info see fact sheet http://bit.ly/1VM4BkB
Information for employers about minimising risks to employees and others when using herbicides such as glyphosate.
Glyphosate has the highest worldwide production volume of all herbicides and is widely used in agriculture and domestically. Glyphosate products (eg ‘Roundup’) are registered by the Australian Pesticides and Veterinary Medicines Authority (APVMA) and have been used in Australia for more than 40 years.
In March 2015, the International Agency for Research on Cancer (IARC) announced that it had reclassified the herbicide glyphosate, from ‘possibly carcinogenic to humans’ (Group 2B) to ‘probably carcinogenic to humans'(Group 2A). In contrast, a subsequent assessment by the European Food Safety Agency concluded that glyphosate is unlikely to pose a carcinogenic hazard to humans and that the evidence does not support classification with regard to its carcinogenic potential.
While the levels of risk to human health posed by glyphosate remains a matter of debate among international health and regulatory bodies, WorkSafe believes it is appropriate to provide information to Victorian employers about the current issue regarding the classification of glyphosate and to remind employers of their occupational health and safety duties relating to the use of this chemical.
Duties of manufacturers and importing suppliers
Under Part 4.1 of the Victorian Occupational Health and Safety Regulations 2007 (OHS Regulations), a manufacturer or importing supplier of a hazardous substance, such as glyphosate, must prepare a material safety data sheet (MSDS) that contains information in accordance with regulation 4.1.6. The MSDS must contain accurate and current information and be reviewed at least every five years.
A manufacturer or importing supplier of a hazardous substance must also label containers in accordance with regulation 4.1.9 and accurately reflect the current classification and state of knowledge about any identified hazards associated with the substance. In Australia, the registration and labelling of agricultural chemicals (such as glyphosate) is also regulated by the APVMA. Following the IARC reclassification, the APVMA has advised that the current labels for glyphosate products provide adequate protection for users; however it is currently considering whether any further regulatory action is necessary.
Duties of employers
Employers are required to ensure they have the up-to-date MSDS for any glyphosate containing products, and if necessary, obtain an updated MSDS from their supplier as soon as possible.
Employers must also control any risk to health associated with the use of glyphosate in accordance with a hierarchy of control measures (regulation 4.1.24). Specifically, employers must consider whether any risk can be eliminated, so far as is reasonably practicable. If this is not reasonably practicable, employers must reduce the risk by substitution, isolation of employees from the source of exposure, by using engineering controls or a combination of these. This includes considering whether:
- the use of the glyphosate can be eliminated by use of alternative weed control methods (such as mechanical slashing) that present lower risks
- an alternative less hazardous registered herbicide may be substituted for glyphosate
- a registered ready-to-use diluted form of the herbicide is available, or
- the herbicide may be applied by a means which will not generate an aerosol (such as a weed wand, coarse spray or low-to-ground spray technique).
Spraying should also be avoided during very windy conditions to minimise the possibility of exposure to spray drift.
In addition, appropriate personal protective equipment (to prevent inhalation of spray and skin contact) must be provided by employers and worn during mixing and spraying.
The OHS Regulations sets out how employers must ensure that any measures implemented to control risks in relation to glyphosate containing products in the workplace are reviewed and, if necessary, revised (regulation 4.1.25).
Section 21(2)(e) of the Occupational Health and Safety Act 2004 (OHS Act) requires employers to provide employees with such information, instruction, training or supervision necessary to perform their work in a way that is safe and without risk to health. This includes instruction and training to minimise the risk of accidental exposure to glyphosate, particularly when concentrates are being handled, and instructions to follow all handling procedures detailed on the APVMA approved label on the container.
The OHS Act also requires that employers (section 23) and self-employed persons (section 24) must, so far as is reasonably practicable, ensure that persons other than employees are not exposed to risks to their health and safety as a result of their activities. As such, employers and self-employed persons must ensure that they implement control measures to minimise the risks to the general public if hazardous substances such as glyphosate are used in public areas.
APVMA (2015) Glyphosate. Available from http://apvma.gov.au/node/13891
WorkSafe Victoria (2015) – Checklist for spraying pesticides – Risk assessment tool for employers
Occupational Health and Safety Act 2004.
Occupational Health and Safety Regulations 2007