Saltas Enterprises of Tasmania, Drum Filter Project, Florentine Hatchery
Total Page:16
File Type:pdf, Size:1020Kb
Saltas Enterprises of Tasmania Florentine Hatchery Construction & Operation of Drum Filters Environmental Effects Report October 2018 1 SALTAS FLORENTINE HATCHERY, DRUM FILTER ENVIRONMENTAL EFFECTS REPORT Contents 1 PART A – Proponent Information .............................................................................................. 6 2 PART B - Proposal Description ................................................................................................... 7 2.1 Description of the proposed activity ............................................................................ 7 2.1.1 Description of proposed activity ...................................................................... 7 2.1.2 Summary of works ......................................................................................... 12 2.1.3 Commissioning and timeframes .................................................................... 13 2.1.4 Production rates ............................................................................................ 14 2.1.5 Solid organic waste and biosolid management plan ..................................... 15 2.2 Proposal area .............................................................................................................. 19 2.3 Map and site plan ....................................................................................................... 21 2.4 Rationale and alternatives .......................................................................................... 25 2.5 Planning information .................................................................................................. 27 2.6 Existing activity ........................................................................................................... 27 3 PART C - Potential Environmental Effects ................................................................................ 28 3.1 Flora and fauna ........................................................................................................... 28 3.2 Weeds and disease ..................................................................................................... 32 3.3 Aquatic environment and wastewater ....................................................................... 32 3.3.1 Aquatic Environment ..................................................................................... 33 3.3.2 Wastewater.................................................................................................... 39 3.3.3 Alternative options for Wastewater Management ....................................... 41 3.3.4 Therapeutic treatments ................................................................................. 42 3.3.5 Stormwater, sediment and runoff control .................................................... 42 3.3.6 De-sludging .................................................................................................... 43 3.4 Significant areas .......................................................................................................... 43 3.5 Air emissions ............................................................................................................... 43 3.5.1 Odour Management ...................................................................................... 44 3.5.2 Dust ................................................................................................................ 44 3.6 Solid wastes ................................................................................................................ 45 3.7 Noise emissions .......................................................................................................... 45 3.8 Transport impacts ....................................................................................................... 47 2 SALTAS FLORENTINE HATCHERY, DRUM FILTER ENVIRONMENTAL EFFECTS REPORT 3.9 Other off-site impacts ................................................................................................. 48 3.10 Hazardous substances ................................................................................................ 48 3.11 Site contamination (historical) .................................................................................... 49 3.12 Heritage ...................................................................................................................... 49 3.13 Sites of high public interest ........................................................................................ 49 3.14 Monitoring and review ............................................................................................... 49 3.15 Rehabilitation .............................................................................................................. 52 4 PART D - Management Commitments ..................................................................................... 53 5 PART E - Public and Stakeholder Consultation ........................................................................ 55 6 References ............................................................................................................................... 56 3 SALTAS FLORENTINE HATCHERY, DRUM FILTER ENVIRONMENTAL EFFECTS REPORT List of Figures Figure 1 Process flow arrangement for current operations at Florentine Hatchery .............................. 8 Figure 2 Process flow arrangement for Florentine Hatchery post installation of drum filter (green boxes). ..................................................................................................................................................... 9 Figure 3 Illustration of a Hydrotech drum filter .................................................................................... 10 Figure 4 Schematic of Florentine Hatchery drum chamber isometric ................................................. 11 Figure 5 Illustrations of the sludge clarifier (a); internal schematic of sludge clarifier (b) ................... 16 Figure 6 Flow diagram of waste removal process with the proposed drum filter ............................... 18 Figure 7 Location map of Florentine Hatchery and surrounding area with intake and discharge locations (red and yellow stars) 22 Figure 8 Schematic of the current site arrangement at Florentine Hatchery ...................................... 23 Figure 9 Schematic of the Florentine Hatchery settlement pond with the proposed drum filter location and surrounding existing and proposed infrastructure .......................................................... 24 Figure 10 Location of observations of Wedge-tailed Eagles nests and modelled Wedge-tailed Eagle habitat in the vicinity of the Florentine Hatchery. ................................................................................ 31 Figure 11 Coordinates and diagram of water quality sampling locations for Florentine Hatchery ..... 51 4 SALTAS FLORENTINE HATCHERY, DRUM FILTER ENVIRONMENTAL EFFECTS REPORT List of Table Table 1 Drum filter specifications ......................................................................................................... 10 Table 2 Expected excavation volumes .................................................................................................. 13 Table 3 Biomass levels and maximum feed rates at Florentine Hatchery ............................................ 14 Table 4 Typical daily water intake in the RAS and flowthrough systems at the Florentine Hatchery .. 14 Table 5 Monthly average of river flow discharge from Hydro Tas Station 40.1 on Florentine River ... 19 Table 6 Monthly average rainfall and temperatures for Florentine area ............................................. 20 Table 7 Data sources and approaches to aquatic biodiversity-focused environmental impact assessment for Tassal and SALTAS freshwater hatcheries. TSPA = Tasmanian Species Protection Act (1995); EPBC = Environment Protection and Biodiversity Conservation Act (1999) ............................ 29 Table 8 Details of observations of nearest Wedge-tailed Eagle nests to the Florentine Hatchery in the Tasmanian Natural Values Atlas. .......................................................................................................... 31 Table 9 List of upstream sampling events from 2015, 2016, 2017 and 2018. Note that not all parameters were sampled and/or analysed during each sampling event. .......................................... 34 Table 10 Number of data points for each parameter by year and season. Parameter 1 refers to parameters measured in the Florentine Hatchery sampling program. Parameter 2 refers to the equivalent label in Water Quality Default Guideline Values for the Upper Derwent. ......................... 35 Table 11 Annual default water quality guideline values for the Upper Derwent (DER) and (preliminary) derived water quality guideline values for Florentine Hatchery (FLO). .......................... 37 Table 12 Seasonal default water quality guideline values for the Upper Derwent (DER) and preliminary derived water quality guideline values for Florentine Hatchery (FLO). ............................ 38 Table 13 Median, 90th percentile and maximum parameter values for water samples taken from the settlement pond and downstream of Florentine Hatchery. ................................................................. 40 Table 14 Interim effluent quality limits for Florentine Hatchery .......................................................... 41 Table 15 Chemical agents used at Tassal and