Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:5:p1
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 5 (pt 1/3)
Character Range: 1736959–1740134

5                                    10                                     20   30   40   60
                                     Based on LOEC and EC30 data
Areas of ecological significance     5                                      30   45   60   70    95
Urban residential/public open space  30                                     170  270  350  420   560
Commercial/industrial                55                                     290  460  600  730   960
                                     Based on EC50 data
Areas of ecological significance     10                                     65   100  130  160   210
Urban residential/public open space  55                                     270  440  570  700   910
Commercial/industrial                90                                     460  730  960  1200  1500

9.7.4.2         Calculation of ambient background concentration values
The ABC values used for aged Ni were obtained from Table 80.

9.7.4.3         Examples of soil quality guidelines for fresh nickel contamination in Australian soils based on lowest observed effect concentration and 30% effect concentration data, and based on 50% effect concentration data
Ambient background concentration values for Ni vary with soil type as do the Ni ACL values. Therefore, it is not possible to present a single set of SQG(LOEC & EC30) or SQG(EC50) values. Thus, two examples of Ni SQG(LOEC & EC30) values and two examples for Ni SQG(EC50) values are provided below. These examples would be at the low and high end of the range of SQG values (but not the extreme values) generated for Australian soils.

SQG(LOEC & EC30) Example 1
Site descriptors  urban residential land/public open space use in an old Queensland suburb (that is, aged contamination), with high traffic volume.
Soil descriptors  a sandy acidic soil (pH 5, CEC 10) with 1% iron content.
The resulting ACL(LOEC & EC30), ABC and SQG(LOEC & EC30) values are:
ACL(LOEC & EC30):    170 mg/kg
ABC:     4 mg/kg
SQG(LOEC & EC30):    174 mg/kg, which would be rounded off to 170 mg/kg.

SQG(LOEC & EC30) Example 2
Site descriptors  commercial/industrial land use in an old Victorian suburb, with high traffic volume.
Soil descriptors  an alkaline clay soil (pH 7.5, CEC 40) with 10% iron content.
The resulting ACL(LOEC & EC30), ABC and SQG(LOEC & EC30) values are:
ACL(LOEC & EC30):    730 mg/kg
ABC:    10 mg/kg
SQG(LOEC & EC30):    740 mg/kg

SQG(EC50) Example 1
Site descriptors  urban residential land/public open space use in an old Queensland suburb (that is, aged contamination), with high traffic volume.
Soil descriptors  a sandy acidic soil (pH 5, CEC 10) with 1% iron content.
The resulting ACL(EC50), ABC and SQG(EC50) values are:
ACL(EC50):    270 mg/kg
ABC:     4 mg/kg
SQG(EC50):    274 mg/kg, which would be rounded off to 270 mg/kg.

SQG(EC50) Example 2
Site descriptors  commercial/industrial land use in an old Victorian suburb, with high traffic volume.
Soil descriptors  an alkaline clay soil (pH 7.5, CEC 40) with 10% iron content.
The resulting ACL(EC50), ABC and SQG(EC50) values are:
ACL(EC50):    1200 mg/kg
ABC:    10 mg/kg
SQG(EC50):    1210 mg/kg, which would be