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 5/7)
Character Range: 1701854–1704730

values
The ABC values for aged Pb contamination were calculated using the method described earlier in this Schedule.

8.7.3.3         Examples of soil quality guidelines for aged lead contamination in Australian soils based on lowest observed effect concentration and 10% effect concentration data and on 50% effect concentration data.
Four examples of SQGs that would apply to aged Pb contamination that represent the range (but not the extremes) of SQGs that would apply to urban residential/public open space and commercial/industrial land uses are presented below.

SQG(LOEC & EC30) Example 1
Site descriptors  urban residential land/public open space use in an old South Australian (that is, contamination is >2 years old), with low traffic volume.
Soil descriptors  these are not relevant as soil properties are not considered in determining the ACL for Pb.
The resulting ACL(LOEC & EC30), ABC and SQG(LOEC & EC30) values are:
ACL(LOEC & EC30):    1100 mg/kg
ABC:     150 mg/kg
SQG(LOEC & EC30):    1250 mg/kg, which would be rounded off to 1,200 mg/kg.

SQG(LOEC & EC30) Example 2
Site descriptors  commercial/industrial land use in an old Queensland suburb (that is, contamination is >2 years old), with high traffic volume..
Soil descriptors  these are not relevant as soil properties are not considered in determining the ACL for Pb.
The resulting ACL(LOEC & EC30), ABC and SQG(LOEC & EC30) values are:
ACL(LOEC & EC30):    1800 mg/kg
ABC:    150 mg/kg
SQG(LOEC & EC30):    1950 mg/kg, which would be rounded off to 1900 mg/kg,

SQG(EC50) Example 1
Site descriptors  urban residential land/public open space use in an old South Australian (that is, contamination is >2 years old), with low traffic volume.
Soil descriptors  these are not relevant as soil properties are not considered in determining the ACL for Pb.
The resulting ACL(EC50), ABC and SQG(EC50) values are:
ACL(EC50):   2000 mg/kg
ABC:    30 mg/kg
SQG(EC50):   2030 mg/kg, which would be rounded off to 2000 mg/kg.

SQG(EC50) Example 2
Site descriptors  commercial/industrial land use in an old Queensland suburb (that is, contamination is >2 years old), with high traffic volume.
Soil descriptors  these are not relevant as soil properties are not considered in determining the ACL for Pb.
The resulting ACL(EC50), ABC and SQG(EC50) values are:
ACL(EC50):   3700 mg/kg
ABC:   150 mg/kg
SQG(EC50):   3850 mg/kg, which would be rounded off to 3800 mg/kg.

8.8              Reliability of the soil quality guidelines
The Pb toxicity data set met the minimum data requirements to use the SSD method but there were no suitable normalisation relationships available to account for soil characteristics. Based on the criteria for assessing the reliability of SQGs (Schedule B5b), this means that the Pb SQGs were considered to be of moderate reliability.

8.9              Comparison with other