Surface and underground mineral working
A7 The likelihood of significant effects will tend to depend on the scale and duration of the works, and the likely consequent impact of noise, dust, discharges to water and visual intrusion. All new open cast mines and underground mines will generally require EIA. For clay, sand and gravel workings, quarries and peat extraction sites, EIA is more likely to be required if they would cover more than 15 hectares or involve the extraction of more than 30,000 tonnes of mineral per year.
Extraction of minerals by dredging in fluvial waters
A8 Particular consideration should be given to noise, and any wider impacts on the surrounding hydrology and ecology. EIA is more likely to be required where it is expected that more than 100,000 tonnes of mineral will be extracted per year.
A9 EIA is more likely to be required where the scale of the drilling operations involves development of a surface site of more than 5 hectares. Regard should be had to the likely wider impacts on surrounding hydrology and ecology. On its own, exploratory deep drilling is unlikely to require EIA. It would not be appropriate to require EIA for exploratory activity simply because it might eventually lead to some form of permanent activity.
Surface industrial installations for the extraction of coal, petroleum, natural gas, ores, or bituminous shale
A10 The main considerations are likely to be the scale of development, emissions to air, discharges to water, the risk of accident and the arrangements for transporting the fuel. EIA is more likely to be required if the development is on a major scale (site of 10 hectares or more) or where production is expected to be substantial (e.g. more than 100,000 tonnes of petroleum per year).
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