Methodology
1. Selection of chemical substances 
2. Development of a TDS food list 
3. Food sampling 
4. Sample preparation 
5. Laboratory analysis 
6. Dietary exposure assessment 
7. Publication of results Dietary exposure assessment
Estimate dietary exposure of the population 
- Estimate the dietary exposure by combining food consumption data and chemical substance concentration data.
- Estimate the dietary exposure for average and high consumers of the Hong Kong adults aged 18 or above and younger population aged 6-17.
Assess the associated health risks
- Compare the resulting dietary exposure estimates of the chemical substances against their respective health-based guidance values (HBGVs) or other toxicological reference values as appropriate.