Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:20:p5
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 20 (pt 5/10)
Character Range: 1662489–1666192

study.

7.7.2         Calculation of soil quality guidelines for aged copper contamination based on no observed effect concentration and 10% effect concentration toxicity data

7.7.2.1         Calculation of soil-specific added contaminant limits
The raw toxicity data (Appendix E) for Cu that was generated using freshly spiked and non-leached soils was multiplied by the ALF of 2. That data that was field-based and aged and/or leached laboratory-based data was not multiplied by the ALF. In all other ways the aged ACL(NOEC & EC10) and SQG(NOEC & EC10) values were calculated using the same methods as described in earlier sections. The resulting soil-specific ACL(NOEC & EC10) values for aged Cu contamination are presented in Table 57.

Table 57. Soil-specific ACLs (mg/kg) based on no observed effect concentration (NOEC) and 10% effect concentration (EC10) data for aged copper (Cu) 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 4.5 to 8 and a CEC ranging from 5 to 60 cmolc/kg for various land uses. The lower of the CEC- or the pH-derived ACLs for a particular land use that apply to a soil is the aged ACL(NOEC & EC10) to be used.
Areas of ecological significance land use
Type of ACL                                   CEC (cmolc/kg)
                                              5               10   20   30   40   60
CEC-based ACLs                                15              25   30   30   30   35
                                              pH
                                              4.5             5.5  6    6.5  7.5  8.0
pH-based ACLs                                 8               20   25   40   80   110
Urban residential/public open space land use
Type of ACL                                   CEC
                                              5               10   20   30   40   60
CEC-based ACLs                                50              110  110  120  120  130
                                              pH
                                              4.5             5.5  6    6.5  7.5  8.0
pH-based ACLs                                 30              70   110  150  310  440
Commercial/industrial land use
Type of ACL                                   CEC (cmolc/kg)
                                              5               10   20   30   40   60
CEC-based ACLs                                80              160  180  180  190  200
                                              pH
                                              4.5             5.5  6    6.5  7.5  8.0
pH-based ACLs                                 50              110  160  230  480  680

7.7.2.2         Calculation of ambient background concentration values
For aged contaminated sites (that is, the contamination has been in place for at least 2 years) the  methodology (Schedule B5b) recommends using the 25th percentiles of the ABC data for the 'old suburbs' from Olszowy et al. (1995) (see Table 58).
Table 58. Copper (Cu) ambient background concentrations (ABC) based on the 25th percentiles of Cu concentrations in 'old suburbs' (that is, >2 years old) from various states of Australia (Olszowy et al. 1995).
Suburb type               25th percentile of Cu ABC values (mg/kg)
NSW                       QLD                                       SA  VIC
Old suburb, low traffic   20                                        10  15   10
Old suburb, high traffic  30                                        15  25   10

7.7.2.3         Examples of soil quality guidelines for aged copper contamination in Australian