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 1/2)
Character Range: 1726016–1729117

5                                    10                                     20   30   40   60
                                     Based on LOEC and EC30 data
Areas of ecological significance     1                                      7    10   15   15   25
Residential urban/public open space  10                                     50   85   110  130  170
Commercial/industrial                20                                     100  170  220  260  350
                                     Based on EC50 data
Areas of ecological significance     5                                      25   40   55   65   90
Residential urban/public open space  30                                     160  250  330  400  520
Commercial/industrial                55                                     280  450  590  710  940

9.6.2.2         Calculation of ambient background concentration values
The ABC values for Ni were calculated using the method previously set out, and the values presented in Table 76.

9.6.2.3         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% data
To calculate the Ni SQG(LOEC & EC30) and the SQG(EC50) values, the ABC value is added to the corresponding ACL values. ABC values and Ni ACL values vary with soil type. 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) and two examples for Ni SQG(EC50) 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 a new suburb (that is, fresh contamination).
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):    50 mg/kg
ABC:     7 mg/kg
SQG(LOEC & EC30):    57 mg/kg, which would be rounded off to 55 mg/kg.

SQG(LOEC & EC30) Example 2
Site descriptors  commercial/industrial land use in a new suburb.
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):    260 mg/kg
ABC:    35 mg/kg
SQG(LOEC & EC30):    295 mg/kg, which would be rounded off to 290 mg/kg.

SQG(EC50) Example 1
Site descriptors  urban residential land/public open space use in a new suburb (that is, fresh contamination).
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):    160 mg/kg
ABC:     7 mg/kg
SQG(EC50):    167 mg/kg, which would be rounded off to 170 mg/kg

SQG(EC50) Example 2
Site descriptors  commercial/industrial land use in a new suburb.
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):    710 mg/kg
ABC:    35