Use this tool to calculate the Hazard Quotient (HQ) for a threshold contaminant
training material for more information).
If a Hazard Quotient greater than 0.2 is calculated, a risk to human health potentially
Note: dusts can be trapped by the nose and later ingested, soils can also be ingested from hands if hands are not regulary washed or if dusts deposit on foods eaten at the site.
Note: If multiple animals are consumed from the site (i.e., crabs, chickens, snakes, snails etc.), the dose from eating these items should be calculated separately using the same formula.
Note: the concentration of respirable dust may be much higher in certain circumstances. Examples would include locations next to dirt roads and inside workshops or storage facilities.
Note: For a given area of skin, hands will be exposed to a greater mass of contaminated soil than skin on other parts of the body. Health Canada (2004) give hands a 10x greater loading (SLH) than other skin covered partions of the body. Please refer to Exposure Table.