AECH1112: Element 6 - Environmental Risk Assessments

Environmental aspect

element of an organization’s activities or products or services that can interact with the environment

environmental impact

any change to the environment, whether adverse or beneficial, wholly or partly resulting form an organization’s environmental aspects

receptors

flora and fauna, water courses, local populace

flora and faun a

ecological assessments of plants and animals at risk

water courses

survey of water abstractions to establish licensed and unlicensed abstractions to establish licensed and unlicensed abstractions and their proximity to the site

local populace

Impacts could include air and climate, noise and vibration, cultural heritage, landscape and visual impacts

Gaseous

Pure gases are substances which remain in the gaseous phase at the process temperatures and pressures, such as carbon dioxide, nitrogen and ozone

Vapour

the gaseous state of materials which are liquid at normal temperature and pressure

Odours

unpleasant smell; Statutory Nuisance under Part III of the **Environmental Protection Act 1990**

mist

fine liquid droplets, usually nucleated by a particle

fume

generally taken to refer to very small particles, of less than 1 micron, that are suspended in flue gases and air

smoke

Particles in the range 0.1 microns to 10 micron

Dust

any size or shape of particle, crystalline or amorphous

grit

course solid particulate matter greater than 76 microns

fibre

particles given off from materials of fibrous nature such as wood and asbestos; elongated shaped and long

point source

a distinct, controllable source such as a stack or chimney

non point source

small uncontrolled air pollution sources; solvent from open containers

Fugitive Emissions

Emissions that should not be there

Primary Pollutants

emitted directly into air causing harm

secondary pollutants

formed from reaction of primary pollutants with other substances

smog

Generic term for particulate matter & gases and substances that can be breathed in by people, causing lung diseases and irritation

Photochemical smog

Reaction of primary pollutants with sunlight and other chemical pollutants forming low level ozone causing lung diseases and irritation

Temperature inversion

warm air forms a barrier over cool air which traps air pollutants

small particles

fabric filters, electrostatic precipitators remove ____________

large particles

gravity separators, cyclones remove ___________

wet scrubbers

used for removal of gases

adsorption

removal of VOCs

water walls

for dust removal