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: 1570171–1573243

5                               10              20    30    40    60
4.0                             200             230   230   230   230   230
4.5                             270             350   350   350   350   350
5.0                             370             510   510   510   510   510
5.5                             510             760   760   760   760   760
6.0                             650             1100  1100  1100  1100  1100
6.5                             650             1100  1700  1700  1700  1700
7.0                             650             1100  1900  2500  2500  2500
7.5                             650             1100  1900  2700  3400  3600

3.7.3.2         Calculation of ambient background concentrations
The ABC values used for aged Zn contamination are presented in Table 14.

3.7.3.3         Examples of soil quality guidelines for Australian soils with aged zinc contamination based on lowest observed effect concentration and 30% effect concentration data, and based on 50% effect concentration toxicity data
Both the ACL and ABC values for aged zinc contamination are soil-specific therefore a single set of SQGs could not be presented. Thus, examples from the low and high portions of the range of SQG(LOEC & EC30) and SQG(EC50) are presented below.

SQG(LOEC & EC30)—Example 1
Site descriptors  urban residential/public open space land use in an old NSW suburb with low 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)  180  mg/kg
ABC               75   mg/kg
SQG(LOEC & EC30)  255  mg/kg

This SQG(LOEC & EC30) would then be rounded off using the rules in section 2.1 to a value of 250 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 a 10% iron content.
The resulting ACL(LOEC & EC30), ABC and SQG(LOEC & EC30) values are:
ACL(LOEC & EC30)  1900  mg/kg
ABC               55    mg/kg
SQG(LOEC & EC30)  1955  mg/kg

This SQG(LOEC & EC30) would then be rounded off using the rules in section 2.1 to a value of 2000 mg/kg.

SQG(EC50)—Example 3
Site descriptors  urban residential/public open space land use in an old NSW suburb with low 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)  330  mg/kg
ABC        75   mg/kg
SQG(EC50)  405  mg/kg

This SQG(EC50) would then be rounded off using the rules in section 2.1 to a value of 400 mg/kg.

SQG(EC50)—Example 4
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 a 10% iron content.
The resulting ACL(EC50), ABC and SQG(EC50) values are:
ACL(EC50)  3400  mg/kg
ABC        55    mg/kg
SQG(EC50)  3455  mg/kg

This SQG(EC50) would then be rounded off using the rules