Hazardous Substance Management and Performance
GC has reviewed national and international laws, regulations, and standards related to the termination or control of chemical use, e.g. the List of Hazardous Substances according to the Department of Industrial Works, the Montreal Protocol on Substances that Deplete the Ozone Layer, the Registration, Evaluation, Authorization and Restriction of Chemicals (REACH), and the Restriction of Hazardous Substances (RoHs), etc. The objective of such action is to regulate the use of chemicals throughout the life cycle of product.
GC has also prepared the Product Safety and Toxicity Disclosure, and has communicated relevant information to employees and suppliers, in order to ensure that the chemicals used in the production process comply with related regulations and laws. GC has provided its customers with the instruction on the safe management of its products through the product labelling in accordance with United Nation’s Globally Harmonized System of Classification and Labelling of Chemicals (GHS) standard. This includes product usage, storage transportation, disposal, etc.
Safety Data Sheet (SDS)
GC develops the Safety Data Sheet (SDS) in an alignment with Globally Harmonised System for Classification and labeling of Chemicals (GHS) to communicate safety information of hazardous substances with internal and external stakeholders, including operators, customers, community, supplier, industrial estate and government. GC also incorporates information in regard to medical treatment and long-term follow-up for the individuals who take risks associated with hazardous substance in products, into the SDS. The SDS is publicly available on website (one page format) in both Thai and English versions, as well as launched in a form of mobile application for the contractor.
In addition the company are aware of the environmental impacts from the use of the hazardous substance. In this regard, GC continues to research and develop products to reduce the use of hazardous chemicals or transform into safer chemicals, as we as prioritize and schedule operations to minimize environmental and human health impacts.
Action plan to control the use of hazardous substances throughout the product life cycle
2016-2017
Reviewing the list of prohibited chemicals / restricted chemicals used in the product exceeding 0.1 percent by weight and reviewing the list of prohibited chemicals / restricted chemicals complying with national and international laws and regulations.
2018
Analyzing products that possibly reduce the use of prohibited chemicals / restricted chemicals, or possibly change to safe chemicals.
2019
Rating of prohibited chemicals / restricted chemicals to cancel or control the use.
Planning and setting timeline for the implementation in order to cancel and control prohibited chemicals / restricted chemicals in the product.
2020-2021
Implementing according to plane to cancel or control the use of prohibited chemicals / restricted chemicals in the product.
Risk Assessment of Hazardous Substances in Products
GC conducts a risk assessment of hazardous substances in products throughout “Cradle-to-Gate” boundary, including raw material acquisition, manufacturing process, and transportation. GC performs the Risk Assessment of Hazardous Substances in Products in the value chain, focusing on two aspects, namely Human Health Risk Assessment of Hazardous Substances in Products, and Environmental Risk Assessment of Hazardous Substances in Products. In terms of the product risk assessment, GC refers to the data from relevant toxicological study and eco-toxicological summary performed by internal and external laboratory research, reference disclosed in national and international levels, and practical data recorded in the using terms (i.e. physicochemical properties and work environment conditions).
Human Health Risk Assessment of Hazardous Substances in Products
In the compliance with Notification of the Ministry of Industry Issue No. 4439 (2555) Issued under the Industrial Product Standards Act 1968 Subject: Defining industrial product standards Health risk assessment for chemical workers in industrial plants, GC has developed software and guideline, product risk evaluation criteria, hazard risk assessment diagram for human health and environment.
The human health risk assessment procedures involve in five steps, including 1) Hazard identification, 2) Does-response assessment, 3) Exposure assessment, 4) Risk Characterization, 5) Risk control.
Process of Human Health Risk Assessment of Hazardous Substances in Products
Substances are categorized through the risk evaluation matrix that mainly considers two factors, such as hazard and frequency of exposure. The risk classification is specified in five levels, including level 0: Acceptable Risk, level 1: Low Risk, level 2: Moderate Risk, level 3: High Risk, and level 4: Very High Risk.
Criteria of Human Health Risk Assessment of Hazardous Substances in Products: Hazard Rating
| Level | Hazard | Impact on human health | |
|---|---|---|---|
| 1 | No Hazard | No effect in human health | |
| 2 | Low hazard | Small effect on human health. There are no such conditions, namely medical treatment, sick leave and cause of disability involved. | |
| 3 | Medium Hazard | Slightly effect on human health. There are such conditions, namely medical treatment, sick leave and cause of disability involved. | |
| 4 | High Hazard | Permanently effect on human health. There are consequences as such severe injury, incurable and long-term sickness conditions involved. | |
| 5 | Very High Hazard | Fatality or disability. | |
Criteria of Human Health Risk Assessment of Hazardous Substances in Products: Average Chemical Concentration throughout operation
| Concentration level | Average Chemical Concentration throughout operation |
|---|---|
| 1 | Below 10% of OEL-TWA |
| 2 | Below 50% of OEL-TWA |
| 3 | Below 75% of OEL-TWA |
| 4 | Between 75% - 100% of OEL-TWA |
| 5 | Exceed 100% of OEL-TWA |
Criteria of Human Health Risk Assessment of Hazardous Substances in Products: Frequency of Exposure
| Level | Frequency | Frequency of Exposure | Shift Operation (12 hours.) |
|---|---|---|---|
| 1 | Rarely | Expose once a year | Once a year |
| 2 | Infrequently | Expose 2-3 times a year | Once a month |
| 3 | Frequently | Expose 2-3 times a month | 1-2 hours per shift operation |
| 4 | Likely frequently | Continually Expose 2 – 4 hours per shift operation | 4-6 hours per shift operation |
| 5 | Regularly | Entirely expose throughout shift operation | 12 hours per shift operation |
Additionally, GC has also set controlling measures for the risk identified as per to the criteria matrix below.
| Scoring | Risk Category | Risk level | Measures |
|---|---|---|---|
| 1-3 | Acceptable | 0 | Risk shall be monitored regularly |
| 4-9 | Low | 1 | Risks shall be closely monitored and reassessed regularly |
| 10-16 | Moderate | 2 | Controlling measures shall be provided immediately |
| 17-20 | High | 3 | Controlling measures shall be provided immediately. Long-term controlling plans shall be conducted |
| 21-25 | Very high | 4 | Product shall be terminate immediately |
Human Health Risk Assessment of Hazardous Substances in Products
In 2020, GC conducted Human Health Risk Assessment of Hazardous Substances in Products for total all products (40 groups of products) that may affect employee’ and operators’ health, covering job positions, such as Division Manager, Shift Manager/Day Manager, Field Operator and Contractor. As a result, all products were addressed to low risks.
For those identified risks, GC has set controlling measures in place to ensure that our employees’ health and well-being and have proper understanding about preventive measures for the hazardous substances as follows
- Wearing chemical protection mask
- Wearing safety goggle
- Wearing chemical protection gloves
- Wearing safety shoes
- Monitoring on workers’ health, and harmful areas for each job position
Apart from assessing the Human Health Risk of Hazardous Substances in Products that affect workers’ and users’ health, GC has also conducted the Environmental Risk Assessment of Hazardous Substances in Products in consistent with the criteria and regulations of the International Council of Chemicals Association (ICCA).
Process of environmental Risk Assessment of Hazardous Substances in Products
Environmental Risk Assessment of Hazardous Substances in Products
GC refers to the several sources of information, namely Safety Data Sheet (SDS) that is publicly disclosed for stakeholders, toxicological studies from European Chemicals Agency (ECHA), and GHS Classification Databases according to UN GHS Category, in order to classify the hazards of hazardous substances, covering 100 percent of products (40 products). GC also uses REACH registration as references to screen out product risks. As a result, there were total 29 products under REACH registration, thus, these products were proceeded to prioritize in four priorities for risk assessment according to ICCA guidance. The result showed that 19 products (47.5 percent of total products) were classified in Priority 4 Very Low Hazard/Exposure Potential and ten products (25 percent of total products) were classified in Priority 3: Low Hazard/Exposure Potential. In addition to the result, GC proceeded to use ECETOC TRA, a calculation tool to implement Hazard Characterization by considering several environmental factors, namely Microorganisms in STP, Freshwater aquatic, Freshwater sediment, Marine water, Marine sediment and Terrestrial compartment.
According to Risk Management Category (RMC) of ICCA, identified risks associated with three products were classified in Medium risk for environment. However, GC has controlling and monitoring measures to ensure that quality of entire environmental aspects are in line with standards and potential environmental impacts are controlled properly.
Preventive and Controlling Measures for the Environmental Impacts
GC values importance of preventive measures to avoid such environmental impacts. We designate preventive and controlling procedures throughout the implementation of project starting with designing phase, and thoroughly conduct feasibility of environmental impacts of each project through Environmental Impact Assessment Reporting (EIA). GC also strictly complies with the preventive and controlling measures as well as continually reports monitoring results to relevant government parties on a regular basis. More importantly, GC brings over practices of international standard ISO 14001 and environmental management systems and apply them as a foundation of our implementation process. Other best practices, such as Environmental, Health and Safety Guidelines by International Finance Corporation (IFC) (World Bank Group) and Internet of Things (IoT) are integrated in the measures. Examples of Preventive and controlling measures for the environmental impacts are as follows
| Environmental impacts | Preventive and controlling measures |
|---|---|
| Air Quality |
|
| Water Quality |
|
| Soil Quality |
|