13.2 The Wallis Lake Estuary Management Committee - Great Lakes ...

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Wallis Lake Estuary Management Plan W.9 Management Area A, B, C, D, E, F Management Objective Minimise the volume of gross pollutants entering the estuary from littering by visitors Action Action Indicative Priority Responsibilities Progress No Cost W.9.1 All hire boats to have secured garbage bins $10,000 High (B4) Boatshed owners W.9.2 Encourage visitors to the islands to take their litter away with them by erecting $5,000 High (B4) GLC signage at reserve areas W.9.3 Add a paragraph to the information/maps supplied by boatshed businesses encouraging visitors to the islands in Wallis Lake to take their litter away with them, and stating that when visiting islands tourists may be stepping onto Nominal High (B4) Boatshed owners, Forster ALC Aboriginal Land and to please respect this by not littering Comments For action W.9.1 small garbage bins should be attached to the boat. GLC should consider providing boat hire businesses with an extra wheelie bin to contain the additional garbage being generated by visitors/tourists when on the water. This option is preferable to providing plastic garbage bags, as these are more likely to be blown into the water. The amount of garbage (especially plastic bags and bait bags) entering the estuary through littering increases considerably during peak periods. Hence this strategy is designed to target visitors and tourists to the Wallis Lake area W.10 Management Area A, B, C, D, E, F Management Objective Reduce/prevent the input of nutrient and faecal material to the estuary from blackwater and greywater Action No W.10.1 W.10.2 W.10.3 Action Continue to enforce regulations regarding treated effluent discharge from vessels in areas close to oyster leases, wetlands, townships etc. Continue to ensure that all new houseboats contain greywater holding tanks and phase out houseboats (commercial and private) without greywater holding tanks (action 10.19 of the WLCMP) Progress the development and implementation of a CoP for blackwater and greywater for fishing boats when moored at the Wallis Lake Fish Coop in Cape Hawke Harbour Indicative Cost Priority Responsibilities Progress Staff time Immediate (B1) Waterways, Ongoing GLC Staff time High (B3) Waterways, Ongoing GLC $5,000 High (D1) Fish Coop, GLC Comments In response to continuing community concern following the oyster crisis, it is important that measures taken to reduce faecal pollution to Wallis Lake continue to be enforced. 36
Wallis Lake Estuary Management Plan Management Objective Reduce/prevent groundwater contamination by sewage, acid sulfate product and other pollutants associated with development and damage to groundwater dependent ecosystems through unsustainable extraction W.11 Management Area A, B, C, D, E, F Action No W.11.1 W.11.2 W.11.3 W.11.4 Action Continue to implement the Groundwater action plan of the WLCMP: • develop a groundwater risk assessment process • assess the potential impacts of all current and future developments on groundwater quality and quantity • protect the Minimbah aquifer and its recharge area • prepare and implement groundwater management guidelines to maintain sufficient quantity groundwater for future potable use • monitor groundwater quality and groundwater extraction • develop and implement a water quality education and awareness program, including groundwater quality and quantity protection measures Ensure that any future disposal of effluent in domestic and small commercial areas underlain by Quaternary sands is sited down gradient from a bore or well and is associated with regular inspections and monitoring Ensure that any future groundwater extraction complies with the ASS Management Guidelines (Stone et al 1998) Identify and exclude land use or activities that may alter groundwater hydrology and threaten wetland water quality and associated ecosystems Indicative Cost In WLCMP budget Priority Responsibilities Progress High (B3) WaLI group, CMA, MidCoast, DIPNR, GLC Staff time Medium (D3) MidCoast, DIPNR Staff time Medium (D3) GLC, MidCoast, DIPNR Staff time Medium (D3) GLC, DIPNR MidCoast monitoring groundwater quality at Tuncurry/Hallidays Point sewage exfiltration plant Comments Groundwater can act as a hydraulic link possibly contaminating estuaries with effluent and ASS leachate. This can impact upon groundwater dependent ecosystems including the flora and fauna associated with wetlands and could also adversely influence the potability of groundwater used by communities to supplement water supply. The management of ASS where lowering of the groundwater table is involved should follow procedures outlined in the ASS Management Guidelines (Stone et al 1998). This would include the extraction of groundwater for domestic supply or associated with small developments in high risk ASS. Chemical analysis of groundwater, follow up testing of drill cuttings for ASS soil analysis and hydrological assessments may be prescribed where necessary. Ongoing 37
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