RFI - Attachment 2 - Permit Environmental Authority No. EPPR01855314

                                                                                                          Permit
                                                               Environmental authority – EPPR01855314


 Release To Waters
 WT1         Site erosion protection measures and sediment control measures must be implemented and
             must have the hydraulic effectiveness to treat stormwater for 90% of the annual runoff for
             each stormwater catchment.
             Where soils are temporarily exposed for the construction of new facilities or to facilitate
             changes in landfill design, all reasonable and practical measures must be implemented to
             minimise the amount of sediments able to discharge from the site. As a minimum the following
             design criteria apply:
                   1. Collect and drain stormwater from disturbed soils to a sediment basin sized to contain
                      an 80th% five-day event or similar; and
                   2. The design life and design storm for temporary drainage works to convey waters to
                      the sediment basin and around disturbed areas are:
                        a) Disturbed area open for <12 months-1 in 2-year ARI event plus 150mm
                             freeboard; and
                        b) Disturbed area open for 12-24 months—1 in 5-year ARI event plus 150mm
                             freeboard; and
                        c) Disturbed area open for > 24 months-1 in 10-year ARI event plus 150mm
                             freeboard; and
                        d) Temporary culvert crossing—minimum 1 in 1-year ARI hydraulic capacity
 WT2         The release of collected and treated stormwater to waters, from areas of the site not likely to
             be contaminated with waste materials, must be in accordance with Table 2— Compliance limits
             for controlled release of treated stormwater to surface waters.


                   Table 2—Compliance limits for controlled release of treated stormwater to surface waters
                        Quality      Release     Release
                                                              Limit Type        Monitoring Frequency
                    Characteristics   Point       Limit
                   pH (pH Units)    SW2 and 6.5 - 9.0        Range         Commencement of release then
                                    SW5                                    weekly thereafter. If no release
                                                                           occurs, no sampling is required.
                   Specific         SW2 and 1500             Maximum       Commencement of release then
                   Conductance      SW5                                    weekly thereafter. If no release
                   (µS/cm)                                                 occurs, no sampling is required.
                   Dissolved        SW2 and 6                Minimum       Commencement of release then
                   Oxygen (mg/L)    SW5                                    weekly thereafter. If no release
                                                                           occurs, no sampling is required.
                   Total and        SW2 and N/A              N/A           Commencement of release then
                   dissolved        SW5                                    weekly thereafter. If no release
                   aluminium*                                              occurs, no sampling is required.
                   (mg/L)
                   Suspended        SW2 and 50               Maximum       Commencement of release then
                   Solids (mg/L)    SW5                                    weekly thereafter for a minimum
                                                                           of 5 events and until a reliable
                                                                           TSS:NTU correlation is
                                                                           established and agreed to in
                                                                           writing by the administering



Page 9 of 22 • ESR/2016/3415 • Version 2.04 • Effective: 30 JAN 2017          Department of Environment and Science