2 Renmark to border LAP area assessment - EPA - Sa.gov.au

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River Murray and Lower Lakes catchment risk assessment for water quality: Results and management options Heavy metals Event discharge from the Marne River was identified as a moderate heavy metal risk. Previous monitoring data that suggests heavy metal levels are not of major concern (see EPA 1998a). The stormwater discharge point at Swan Reach was assessed as a moderate risk as were the various slipways (wash-off of metal-based anti-fouling paints). Pesticides The significant amount of irrigated horticulture and dryland farming in the area suggests that pesticide use is widespread. Event discharge from the Marne River was identified as a moderate risk although there was some uncertainty due to a lack of monitoring data. Slipways and riverside horticulture areas were assessed as a low pesticide risk. The river water quality data shows generally undetectable pesticide levels at Mannum which somewhat supports this assessment. Pesticide use is regulated through the National Registration Scheme for agricultural and veterinary chemicals (EPA 2003d). 126
Table 5.2 Summary of risks to aquatic ecosystem environmental value, MM LAP area low=low risk, mod=moderate risk, high=high risk, v high=very high risk River Murray and Lower Lakes catchment risk assessment for water quality: Results and management options certainty value (in italics) follows each risk ranking GEOCODE HAZARD EVENT TYPE NU TU OR HM PE HY SA CHEMICAL STORE MM126C Chemical Store, Trucking Company Swan Reach ACCIDENTAL SPILLAGE low 1 low 1 CREEK/RIVER MM194A Marne River DISCHARGE mod 2 low 2 mod 2 mod mod 2 mod 2 MM194B Marne River EVENT DISCHARGE high 3 high 3 high 3 mod mod 2 mod 3 MM195A Saunders Creek DISCHARGE mod 2 low 2 mod 2 low low 2 mod 2 MM195B Saunders Creek EVENT DISCHARGE mod 3 mod 3 mod 3 low low 2 low 2 FERRY MM069B Ferry, Purnong EVENT DISCHARGE low 2 low 2 low 2 low 2 low 2 MM069C Ferry, Purnong ACCIDENTAL SPILLAGE low 2 MM086B Ferry, Walker Flat EVENT DISCHARGE low 2 low 2 low 2 low 2 low 2 MM086C Ferry, Walker Flat ACCIDENTAL SPILLAGE low 2 MM140B Ferry, Swan Reach EVENT DISCHARGE low 2 low 2 low 2 low 2 low 2 MM140C Ferry, Swan Reach ACCIDENTAL SPILLAGE low 2 FUEL STORE MM028C Pump fuel store, Younghusband West ACCIDENTAL SPILLAGE low 2 MM043C Pump fuel store, Younghusband ACCIDENTAL SPILLAGE low 2 MM095C Pump fuel store, Devon Downs North wetland ACCIDENTAL SPILLAGE low 2 MM096C Pump fuel store, Devon Downs North ACCIDENTAL SPILLAGE low 2 MM107C Pump fuel store, backwater adj Preiss landing ACCIDENTAL SPILLAGE low 2 MM109C Pump fuel store, backwater adj Preiss landing ACCIDENTAL SPILLAGE low 2 MM168C Pump fuel store, edge Devon Downs Nth Wetland ACCIDENTAL SPILLAGE low 2 MM189C Petrol pump, Wongulla Lagoon ACCIDENTAL SPILLAGE low 2 GRAZING MM003G Cattle grazing, Cowirra Landing HUMAN/ANIMAL EXCRETION mod 2 mod 2 MM036G Cattle grazing, East Front Rd HUMAN/ANIMAL EXCRETION mod 2 mod 2 MM124G Cattle grazing, adj Marks landing wetland HUMAN/ANIMAL EXCRETION mod 2 mod 2 MM146G Cattle/goat grazing, u/s Swan Reach HUMAN/ANIMAL EXCRETION mod 2 mod 2 MM185G Sheep grazing, Blanchetown HUMAN/ANIMAL EXCRETION mod 2 mod 2 MM192G Goat grazing, north of Younghusband west wetland HUMAN/ANIMAL EXCRETION mod 2 mod 2 127
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E N V I R O N M E N T P R O T E C T
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The River Murray and Lower Lakes ca
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6 Mannum to Wellington LAP area ass
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Table 6.5 Frequency of risk to recr
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Figure 7.2 Example of hazard to wat
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Roz Becker, Riverland Tourism Assoc
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Abbreviations 10 ADWG Australian Dr
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Executive Summary The River Murray
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River Murray and Lower Lakes catchm
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Current and potential future option
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