2016-02-02 P&O Committee - Item 3 - Attachment 4 - Mary River Environmental Values and Water Quality Objectives

            Mary River environmental values and water quality objectives




            Table 9 Irrigation EV: Water quality objectives for heavy metals and metalloids in agricultural
                             1
            irrigation water – long-term trigger value (LTV), short-term trigger value (STV) and soil cumulative
            contamination loading limit (CCL)
            Element            Soil cumulative            Long-term trigger value (LTV) in    Short-term trigger value
                               contaminant loading limit irrigation water (up to 100 yrs)     (STV) in irrigation water
                                             2
                               (CCL - kg/ha)              (mg/L)                              (up to 20 yrs) (mg/L)
            Aluminium          ND                         5                                   20
            Arsenic            20                         0.1                                 2.0
            Beryllium          ND                         0.1                                 0.5
            Boron              ND                         0.5                                 Refer to AWQG (2000)
                                                                                              Vol 3,Table 9.2.18
            Cadmium            2                          0.01                                0.05
            Chromium           ND                         0.1                                 1
            Cobalt             ND                         0.05                                0.1
            Copper             140                        0.2                                 5
            Fluoride           ND                         1                                   2
            Iron               ND                         0.2                                 10
            Lead               260                        2                                   5
            Lithium            ND                         2.5                                 2.5
                                                          (0.075 for Citrus crops)            (0.075 for Citrus crops)
            Manganese          ND                         0.2                                 10
            Mercury            2                          0.002                               0.002
            Molybdenum         ND                         0.01                                0.05
            Nickel             85                         0.2                                 2
            Selenium           10                         0.02                                0.05
            Uranium            ND                         0.01                                0.1
            Vanadium           ND                         0.1                                 0.5
            Zinc               300                        2                                   5
            Source: AWQG (2000), Volume 1, Section 4.2.6, Table 4.2.10

            Notes:
            1. Concentrations in irrigation water should be less than the trigger values. Trigger values should only be used in
               conjunction with information on each individual element and the potential for off-site transport of contaminants (refer
               AWQG [2000], Volume 3, Section 9.2.5)
            2. ND = Not determined; insufficient background data to calculate CCL




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Document Set ID: 20002123
Version: 1, Version Date: 21/12/2015