REFERENCE DOCUMENTS - RAL25/0004 (As Published)

                    •      AWQG 2000 recommends that that the highest level of protection should be provided to underground
                           aquatic ecosystems, given their high conservation value. Where ground waters are in good condition
                           the intent is to maintain existing water quality.
                    Groundwater assessment criteria are presented in Table 16, which also include Groundwater
                    Investigation Levels (GIL’s) for Fresh Waters and Health Screening Levels (HSL’s) listed in NEPM
                    Schedule B1, and PFAS criteria from the PFAS NEMP. The selected (lowest) Site Assessment Criteria
                    (SAC) is presented in bold.
                    Table 16: Groundwater Assessment Criteria (ug/L)
                                                    GIL
                                                               Drinking                                   NEPM             PFAS
                                        Units       Fresh                      EPP SWK    EPP GWN
                                                               Water C                                    HSL’sI           NEMPJ
                                                    Water E
                        Turbidity       NTU         -          5F              <50        -               -                -
                        Suspended       mg/L        -          -               <6         -               -                -
                        Solids
                        Total           ug/L        -          -               500        -               -                -
                        Nitrogen
                        Nitrate         ug/L        -          50,000          -          -               -                -
                        Nitrite         ug/L        -          3,000           -          -               -                -
                        Organic N       ug/L        -          -               <420       -               -                -
                        Ammonia N       ug/L        -          -               <20        -               -                -
                        Total           ug/L        -          -               <50        -               -                -
                        Phosphorus
                        Dissolved       %           -          >85%F           85-110     -               -                -
                        Oxygen
                        pH              pH          -          6.5-8.5F        6.5-8      -               -                -
                        Total           ug/L        -          600F            -          -               -                -
                        Dissolved
                        Solids
                        Chloride        ug/L        -          250,000F        -          -               -                -
                        Arsenic         ug/L        24 (III)   10              24 (III)   1 (III)         -                -
                                                    13 (V)                     13 (V)     0.8 (V)
                        Cadmium         ug/L        0.2        2               0.2        0.06M           -                -
                        Chromium        ug/L        -          -               -          -               -                -
                        (III)
                        Chromium        ug/L        1A         50              1A         0.01            -                -
                        (VI)
                        Cobalt          ug/L        -          -               -          -               -                -
                        Copper          ug/L        1.4        2,000           1.4        1.0M            -                -
                        Iron            ug/L        -          300F            -          -               -                -
                        Lead            ug/L        3.4        10              3.4        1.0M            -                -
                        Mercury         ug/L        0.06B      1               0.06       0.06B           -                -


        125 Lot 105 SP118458 Cooroy DSI 12062024 Rev0                                                  Lot 105 SP118458, Cooroy, QLD, 4563
        12/06/2024                                                        59                        Detailed Site Contamination Investigation
Document Set ID: 23717062
Version: 0, Version Date: 01/01/1900