REN R495 Lecture 4: Jan 17 Environmental Risk Assessment
24 Jan 2019
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Document Summary
Key concept: source-pathway-receptor, source = hazard, pathway is linkage by which receptor could come into contact with the source. If no pathway exists then no risk exists. If pathway exists linking source to receptor then consequences of this determined: approach used in assessment of contaminated land, also applied to many other areas (i. e. noise, erosion, etc) But we are not only looking at contaminants when we look at eras. Ex) wind noise related to wind farms: generally, many pathways and many receptors for one hazard. Ld50: contaminant conc at where 50% of the population dies: last option: protecting receptors, ex) making workers make ppe, extreme ex, moving an entire town. Example sources: contaminated soils, water, leaking drums, storage containers, pipelines. Example receptors: people, domestic and commercial property, infrastructure, ecosystems, animals, plants, water. Pathways to receptor soil route: wind erosion of material, depth of contaminant, release of contaminant, binding with soil, leaching, soil ingestion.
