Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:20:p10
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 20 (pt 10/10)
Character Range: 1677640–1679680

land use, with the exception of the aged ACLs based on EC50, fell within the range of international SQGs for Cu. The one exception was the ACL(EC50) value that would permit concentrations nearly twice (that is, 1,800 mg/kg added) that of the collated international limits (1,000 mg/kg). However, in soils with a pH above 6, the pH-based ACL will limit the amount of Cu that is permitted in soil and thus all the ACLs for commercial/industrial land use fell within the range of international SQGs.

The  Cu ACL(NOEC & EC10) values in freshly contaminated urban residential/public open space soils (which should theoretically protect 80% of species) ranged from 20 to 250 mg/kg (added Cu) (Table 53). The most suitable comparison with these values is with the limits recommended by the EC Cu ecological risk assessment which used NOEC and EC10 data and should theoretically protect 95% of species. These values range from 20 to 173 mg/kg added Cu. The limits derived by these two processes are very similar.

Table 61. Soil quality guidelines for copper (Cu) from international jurisdictions.
Name of Cu limit                           Numerical value of the limit (mg/kg)
Dutch target value1                        36 (added Cu)
Dutch intervention level1                  190 (added Cu)
Canadian SQG (residential)2                63 (total Cu)
Canadian SQG (commercial and industrial)2  91 (total Cu)
Eco-SSL plants3                            70 (total Cu)
Eco-SSL soil invertebrates3                80 (total Cu)
Eco-SSL avian3                             28 (total Cu)
Eco-SSL mammalian3                         49 (total Cu)
EU minimal risk values (residential)4      1470 (added and total Cu)
EU warning risk values (residential)4      100500 (added and total Cu)
EU potential risk values (residential)4    1001000 (added and total Cu)
EU Cu ecological risk assessment5          26176 (added Cu)

1 = VROM 2000
2 = CCME 1999e, & 2006 and http://ceqg-rcqe.ccme.ca/
3 =  http://www.epa.gov/ecotox/ecossl/
4 = Carlon 2007
5 = EC 2008a.