Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:5:p2
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 5 (pt 2/2)
Character Range: 1563184–1565369

method described in this Schedule with the exception that aged or age-corrected Zn toxicity data was used (Tables 21–23). Table 25 presents the ACL(LOEC & EC30) and ACL(EC50) values for the Australian reference soil (Table 6) for areas of ecological significance, urban residential/public open space, and commercial/industrial land uses.

The soil-specific ACL(LOEC and EC30) and ACL(EC50) values for aged Zn contamination and the various land uses are presented in Tables 26 and 27 respectively. As with the ACL(NOEC & EC10) values for aged Zn contamination, the ACL(LOEC & EC30) and ACL(EC50) values must have the soil-specific ABC added. Therefore, the SQG(LOEC & EC30) and SQG(EC50) values will be larger than the corresponding ACL values presented in Tables 26 and 27, respectively. Examples of the SQG(LOEC & EC30) and SQG(EC50) values are provided below.

Table 25. Zinc (Zn) ACLs for the Australian reference soil (pH = 6, CEC = 10 cmolc/kg) based on lowest observed effect concentration and 30% effect concentration toxicity data, and based on 50% effect concentration toxicity data.
Land use                             ACL(LOEC & EC30) values (mg/kg added Zn)  ACL(EC50) values
                                                                               (mg/kg added Zn)
Areas of ecological significance     90                                        140
Urban residential/public open space  400                                       700
Commercial/industrial                630                                       1100

Table 26. Soil-specific added contaminant limits based on lowest observed effect concentration and 30% effect concentration toxicity data (ACL(LOEC & EC30), mg/kg) for aged zinc (Zn) contamination that should theoretically provide the appropriate level of protection (i.e. 99, 80 or 60% of species) to soil processes, soil invertebrate species and plant species in soils with a pH ranging from 4.0 to 7.5 and CEC values ranging from 5 to 60 cmolc/kg. These are the recommended ACL(LOEC & EC30) values for Zn in aged contaminated soils with each land use.
Areas of ecological significance
pH                                            CEC (cmolc/kg)