Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:13:p22
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 13 (pt 22/32)
Character Range: 1941170–1944117

open space land use). Therefore, in order to provide the desired level of protection, the lowest ACL at each soil property value must be adopted as the final ACL.

For Cu there were six normalisation relationships based on CEC. These were for H. vulgare, L. escultentum, E. fetida, F. candida, F. fimetaria and PNR. Of these, PNR always generated the lowest ACL when the CEC was less than 10 cmolc/kg. At all higher CEC values the H. vulgare normalisation relationship always resulted in the lowest ACL. Therefore, one set of soil-specific ACLs was generated by for H. vulgare and another for PNR with the lowest of the two at each CEC being adopted as the CEC-based ACL values for Cu.

In addition, there was one normalisation relationship based on a combination of soil pH and organic carbon content (OC)—for T. aestivum. There were also two normalisation relationships for SIN and MRM that were based on soil pH and one for SIR based on OC. The MRM normalisation relationship was not used as it had a negative relationship with toxicity, which was inconsistent with all the other normalisation relationships for Cu and all other elements. The SIN normalisation relationship always generated ACL values lower than those generated by the T. aestivum relationship at soil pH values up to 5.5. At higher soil pH values the situation was reversed. In addition, the ACLs generated by the SIR relationship (based on OC) were lower than all the ACLs generated by the T. aestivum relationship except when the OC was set at 1 in the T. aestivum relationship. Therefore one set of soil-specific ACLs was generated for T. aestivum and another for SIN with the lowest of the two at each pH being adopted as the CEC-pH-based ACL values for Cu.

The pH and CEC-based ACLs for Cu were presented in tables in this Schedule. The actual ACL values that apply for Cu are the lowest of either the pH-based ACLs or the CEC-based ACLs, depending on the properties of the soil in question.

13.7          Appendix G. Raw toxicity data for lead
Table G1: The raw toxicity data for lead and the ageing/leaching factors that were used in the derivation of the soil quality guidelines derived in this project, and the source of the toxicity data.
Species                        End point           NOEC or EC10 (added)  LOEC and EC30 (added)  EC50 (added)  ALF  References
Avena sativa                   root yield          100                   500                    300           4.2  Khan & Frankland 1984

Hordeum vulgare                shoot yield         50                    250                    1270          4.2  Aery & Jagetiya 1997

Lactuca sativa                 shoot yield         432                   648                    2553          4.2  Stevens et al. 2003
Lactuca sativa                 shoot yield         1172                  1758                   107           4.2  Stevens et al. 2003
Lactuca sativa                 shoot yield         457