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Friday March 25 2011 English
The first results of an ongoing environmental impact of the Tsumeb smelter were announced at a public meeting last week.
The study, being conducted by Synergistics Environmental Services of South Africa, was commissioned again in 2009 by Namibia Custom Smelters to identify environmental risks associated with foundry operations .
samples of air, water, soil and noise and measurements taken in and around Tsumeb smelter and in the last two years was the basis of the impact assessment.
The results confirmed that the annual emissions of sulfur dioxide exceeding international guidelines in some places, while the concentrations of lead and cadmium released into the atmosphere fall below international exposure guidelines.
also found that the historic sites of debris located in the foundry to have some levels of arsenic, lead and cadmium. However, it was found that the buffering capacity of the soils underlying dolomitic prevents exhaust pollutants in the soil profile. Other areas southwest of the smelter signs show that the trace elements come from natural mineralization.
polycyclic aromatic hydrocarbons were considered high in water that escapes the tar pits, but are usually insoluble.
The evaluation showed that some wells north of the old tailings dam is characterized by high levels of sulfates caused by chemicals used when copper and lead were recovered from the old Tsumeb mine. It also showed that some soils of the northwest of the smelter had levels high levels of some pollutants from dust smelting operations.
however, confirmed that the water out of the foundry property is within the guidelines for drinking water.
"Fundamental noise impacts identified in the assessment are related to the level of noise emissions from the smelter operations based oxygen and occasional explosions" from the slag tapping. However, levels noise are well within the international reference values \u200b\u200bfor both day and night times.
On the ecological side, we found that sulfur dioxide levels higher than guidelines for the protection of vegetation and ecosystems around the immediate periphery of the smelting site. There were also reports of minor damage to plant leaf gardens of the city. There has been no visible change in vegetation cover around the foundry since 2000, although the local foundry to show signs of invasion of invasive plant species, "the company said in a statement.
Inglés:
The first results of an Ongoing Environmental Impact Assessment of the Tsumeb Smelter Were Announced at a public meeting last week.
The study, which is being conducted by Synergistics Environmental Services of South Africa, was commissioned back in 2009 by Namibia Custom Smelters in order to identify environmental risks associated with smelter operations.
Air, water, soil and noise samples and measurements taken in and around the smelter complex and Tsumeb over the past two years formed the basis of the impact assessment.
The results confirmed that annual sulphur dioxide emissions exceed international guidelines in some places, while concentrations of lead and cadmium released into the atmosphere fall below international exposure guidelines.
It was also discovered that historical waste sites located at the smelter have some levels of arsenic, lead and cadmium. However, it was found that the natural buffering capacity of the underlying dolomitic soils prevents the contaminants from escaping into the soil profile. Other areas southwest of the smelter show signs that trace elements originate from natural mineralisation.
Polycyclic aromatic hydrocarbons were found to be high in water leaking from tar pits, but these are generally insoluble.
The assessment showed that some boreholes north of the old tailings dam are characterised by elevated levels of sulphates caused by chemicals used when copper and lead were recovered from the old Tsumeb Mine. It also showed that some soils northwest of the smelter had elevated levels of some contaminants originating from dust from smelter operations.
However, it was confirmed that the water outside of the smelter property is within drinking water guidelines.
“Key noise impacts identified in the assessment are related to the level of noise emissions from the smelter-based oxygen plant and occasional operational “explosions” from slag tapping. However, the noise levels fall well within international guideline values for both day and night times.
On the ecological side, it was found that sulphur dioxide levels exceed guidelines for the protection of vegetation and ecosystems around the immediate periphery of the smelter site. Reports were also received of minor plant leaf damage from some gardens in town. There has been no visible change in vegetation cover surrounding the smelter since 2000, although the smelter premises show signs of encroachment by invader plant species,” the company said in a statement.
Economista.Nb
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