Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:1:p13
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 1 (pt 13/16)
Character Range: 2084598–2088029

HIL A of 100 mg/kg (where arsenic bioaccessibility is within the range of 70100%).

On the basis of the above the following HILs have been derived for arsenic (refer to Appendix B for equations used to calculate the HILs and Appendix C for calculations):
HIL Scenario            HIL* (mg/kg)                     Percentage Contribution from Exposure Pathways
Ingestion of Soil/Dust  Ingestion of Home-grown Produce  Dermal Absorption of Soil/Dust                  Inhalation (dust)
Residential A           100                              86                                              9                  5   <1
Residential B           500                              81                                              --                 19  <1
Recreational C          300                              90                                              --                 10  <0.1
Commercial D            3000                             72                                              --                 28  <1

-- Pathway not included in derivation of HIL
* Value derived is based on consideration of the range of oral TRVs derived by JECFA (WHO 2011a) and EFSA (2010) and relevance of the key studies and derived ranges to the Australian population. The HILs are based on 70100% bioavailability—a more site specific bioavailability (such as 25%) may be considered where sufficiently justified.

1.6              References
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