Table 3: Predicted Environmental Concentration (PEC) Typical use of product 20.0 kg 20.0 kg expected per day Amount of Notified 4.0 kg 4.0 kg Chemical (at 20%) Conc. in wastewater 0.6 kg 0.6 kg (fixation rate 85%) Quantity of water used incl. 250 000 L 200 000 L wash-off water (100 L/k) Effluent conc. in product- 2.4 mg/L 3.0 mg/L specific wash-water Dilution factor in dyehouse 1:10 1:10 by other wash-waters (2.5 ML/day effluent) (2 ML/day effluent) Influent concentration 0.24 mg/L 0.3 mg/L Dilution factor in 1:100 1:3 sewage treatment plant1 (250 ML/day) (5-6 ML/day) Conc. balance in effluent 2.4 0.1 mg/L g/L from sewage treatment Dilution factor in 1:0 1:2 receiving waters (river) PEC in receiving waters 0.24 g/L 50 g/L (0.24 ppb) (50 ppb) organism, bacteria2 (NOEC Safety factor for exposure to most sensitive aquatic > 130 000 640 of 32 mg/L) The dilution at a town could reasonably be expected to be about 5-6 ML/day-, while for a major city, say Sydney, it would be between 150-500 ML/day. The respiration rate of aerobic waste water bacteria was not inhibited up to a test concentration of 32 mg/L. Slight inhibition was noted at the next highest test concentration tested of 50 mg/L These calculations show that the exposure to fish, daphnia, algae and waste water treatment bacteria is at levels unlikely to cause any significant effect. At higher release rates, there is still unlikely to be any significant effect on these species. Once in the aquatic environment, the chemical is expected to swiftly dilute to undetectable concentrations, and undergo biotic and abiotic degradation. The only other source of environmental contamination is from accidental spills and disposal of packaging. The information contained in the MSDS is adequate to enable those disposing of the chemical to limit the environmental exposure and therefore limit the environmental effects.
Table 3: Predicted Environmental Concentration (PEC) Typical use of product expected per day Amount of Notified Chemical (at 20%) Conc. in wastewater (fixation rate 85%) Quantity of water used incl. wash-off water (100 L/k) Effluent conc. in product- specific wash-water 20.0 kg 20.0 kg 4.0 kg 4.0 kg 0.6 kg 0.6 kg 250 000 L 200 000 L 2.4 mg/L 3.0 mg/L Dilution factor in dyehouse by other wash-waters 1:10 (2.5 ML/day effluent) 1:10 (2 ML/day effluent) Influent concentration 0.24 mg/L 0.3 mg/L Dilution factor in sewage treatment plant1 1:100 (250 ML/day) 1:3 (5-6 ML/day) Conc. balance in effluent from sewage treatment 2.4 g/L 0.1 mg/L Dilution factor in receiving waters 1:0 1:2 (river) PEC in receiving waters 0.24 g/L (0.24 ppb) 50 g/L (50 ppb) Safety factor for exposure to most sensitive aquatic organism, bacteria2 (NOEC > 130 000 640 of 32 mg/L) The dilution at a town could reasonably be expected to be about 5-6 ML/day-, while for a major city, say Sydney, it would be between 150-500 ML/day. The respiration rate of aerobic waste water bacteria was not inhibited up to a test concentration of 32 mg/L. Slight inhibition was noted at the next highest test concentration tested of 50 mg/L These calculations show that the exposure to fish, daphnia, algae and waste water treatment bacteria is at levels unlikely to cause any significant effect. At higher release rates, there is still unlikely to be any significant effect on these species. Once in the aquatic environment, the chemical is expected to swiftly dilute to undetectable concentrations, and undergo biotic and abiotic degradation. The only other source of environmental contamination is from accidental spills and disposal of packaging. The information contained in the MSDS is adequate to enable those disposing of the chemical to limit the environmental exposure and therefore limit the environmental effects.
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