Environmental impact assessment (EIA) is normally used to evaluate the possi­ble environmental constraints for an industrial plant or project. In some cases it is used as part of a permit process for an industrial plant, road, or other project. The owner has to show that no major environmental impacts are caused by the plant or road, or if there are such impacts, to take remedial mea­sures necessary to decrease and monitor the impacts or relevant indicators.

An EIA may be an extensive exercise, covering many topics, such as

• Project description and objectives

• Sources of emissions and activities causing impacts during construction and use phases

• The environmental state in the area, ecological as well as economic

• Relevant trends in the area

• Scope of the EIA

• Project alternatives

• Impacts studied and methods used

• Prediction of impacts with and without the project

• Definition of mitigation measures

• Monitoring recommendations.

Normally EIA is a major effort in itself, and is therefore mainly used in a systematic manner for large industrial plants or infrastructure projects.

Some elements of the EIA process may be relevant for evaluating indus­trial ventilation projects. Of particular interest are the requirements for indus­trial ventilation put forth by EIAs.

Such requirements could deal with the selection and performance of gas cleaning equipment, and with the design of the duct systems (including stacks).

Further information on the EIA can be found in Environmental Impact Assessment by P. Wathern.1


1. P. Wathern, Environmental Impact Assessment., Routhledge, London and New York, 1988.

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