Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:4:p4
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 4 (pt 4/4)
Character Range: 2812267–2817122

derived from route extrapolation from an oral value (as undertaken by RIVM). In relation to the available oral TRVs, the most recent evaluation conducted by US EPA is considered the most appropriate. From this oral TRV, an inhalation TRV of 0.007 mg/m3 can be derived (for a 70 kg adult where 20 m3 of air is inhaled each day).

    4.5.3         Recommendation
In relation to cis-1,2-DCE, only soil vapour Interim HILs have been derived. Hence only the inhalation pathway has been quantified in the development of these HILs. On the basis of the discussion above, the following inhalation toxicity reference values (TRVs) have been adopted for cis-1,2-DCE:

4.6              Calculated Interim HILs
On the basis of the above, the following interim soil vapour HILs have been derived for DCE (refer to Appendix B for equations used to calculate the HILs and Appendix C for calculations):
HIL Scenario                                                                                                                                                                                                                                                                                                                                                                               Interim Soil Vapour HIL# (mg/m3)
Residential A                                                                                                                                                                                                                                                                                                                                                                              0.08
Residential B                                                                                                                                                                                                                                                                                                                                                                              0.08
Recreational C                                                                                                                                                                                                                                                                                                                                                                             2
Commercial D                                                                                                                                                                                                                                                                                                                                                                               0.3
# Interim soil gas HILs are conservative soil gas concentrations that can be adopted for the purpose of screening sites where further investigation is required on a site-specific basis. They are based on the potential for vapour intrusion indoors using an indoor air-to-soil gas attenuation factor of 0.1 for HILs A, B and D and an outdoor attenuation factor of 0.05 for HIL C.

4.7              References
ATSDR 1996, Toxicological Profile for 1,2-Dichloroethene, available on website at: http://www.atsdr.cdc.gov/ToxProfiles/tp.asp?id=464&tid=82.
NEPC 1999, Schedule B (7a), Guideline on Health-Based Investigation Levels, National Environment Protection (Assessment of Site Contamination) Measure, National Environment Protection Council, Australia.
NHMRC 2011, National water quality management strategy, Australian drinking water guidelines, National Health and Medical Research Council, Australia.
RIVM 2001, Re-evaluation of human-toxicological Maximum Permissible Risk levels, National Institute of Public Health and the Environment, Bilthoven, Netherlands, available from: http://www.rivm.nl/bibliotheek/rapporten/711701025.html.
US EPA (IRIS 2012), data and information available from the Integrated Risk Information System, an online database, available from http://www.epa.gov/iris/.
US EPA 1995, Technical Guidance Manual, Assessing Dermal Exposure from Soil, US EPA Region 3, December 1995, available from: http://www.epa.gov/reg3hwmd/risk/human/info/solabsg2.htm.
US EPA 2010, Toxicological Review of cis-1,2-Dichloroethylene and trans-1,2-Dichloroethylene, in support of Summary Information on the Integrated Risk Information System (IRIS), September 2010, EPA/635/R-09/006F.
WA DEP 2000, Volatile Organic Compounds Monitoring in Perth, Baseline Air Toxics Project, Western Australian Department of Environmental Protection.
WHO 2011, Guidelines for drinking-water quality, 4th edn, World Health Organization, Geneva, available from http://www.who.int/water_sanitation_health/dwq/chemicals/en/index.html.