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 1/4)
Character Range: 1547219–1550341

5                               10              20   30   40    60
4.0                             80              95   95   95    95    95
4.5                             100             150  150  150   150   150
5.0                             150             200  200  200   200   200
5.5                             200             300  300  300   300   300
6.0                             250             450  450  450   450   450
6.5                             259             450  650  650   650   650
7.0                             259             450  750  1000  1000  1000
7.5                             259             450  750  1100  1300  1400

3.6.3.2         Calculation of ambient background concentration values
The ABC values for freshly contaminated soils were calculated using the method set out in this Schedule and presented in Table 13.

3.6.3.3         Examples of soil quality guidelines for fresh zinc contamination based on lowest observed effect concentration and 30% effect concentration data, and based on 50% effect data
In order to calculate the SQG(LOEC & EC30) and SQG(EC50) values the soil-specific ABC has to be added to the ACL(LOEC & EC30) and ACL(EC50) values, respectively. Therefore, the SQG(LOEC & EC30) and SQG(EC50) values will always be at least as large as those presented in Tables 19 and 20. Examples of the SQG(LOEC & EC30) and SQG(EC50) values are provided below.

SQG(LOEC & EC30)—Example 1
Site descriptors  urban residential/public open space land use in a new suburb.
Soil descriptors – a sandy acidic soil (pH 5, CEC 10) with a 1% iron content.
The resulting ACL(LOEC & EC30), ABC and SQG(LOEC & EC30) values are:
ACL(LOEC & EC30)  70  mg/kg
ABC               10  mg/kg
SQG(LOEC & EC30)  80  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 a 10% iron content.
The resulting ACL(LOEC & EC30), ABC and SQG(LOEC & EC30) values are:
ACL(LOEC & EC30)  730   mg/kg
ABC                 40  mg/kg
SQG(LOEC & EC30)  770   mg/kg

SQG(EC50)—Example 3
Site descriptors  urban residential/public open space land use in a new suburb.
Soil descriptors – a sandy acidic soil (pH 5, CEC 10) with a 1% iron content.
The resulting ACL(EC50), ABC and SQG(EC50) values are:
ACL(EC50)  130   mg/kg
ABC          10  mg/kg
SQG(EC50)  140   mg/kg

SQG(EC50)—Example 4
Site descriptors  commercial/industrial land use in a new suburb.
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)  1300    mg/kg
ABC            40  mg/kg
SQG(EC50)  1340    mg/kg

3.7              Calculation of soil quality guidelines for aged zinc contamination

3.7.1         Calculation of an ageing and leaching factor for zinc
In addition to calculating SQGs in recently contaminated soils (that is, contamination is <2 years old), an equivalent set of levels was derived for soils where the contamination is aged (that is, it has been present for ≥2 years). The Zn SQG(NOEC & EC10),