|Characterisation Method Name:|
|Cr air emissions impact on severe morbidity|
|Principal Method Name:|
|EPS: cancer pathway|
|Model for cancer pathway|
The characterisation factor is determined by the empirical method.
Category indicator value in system considered
The portion of cancer incidences not causing death (38%) is classified as severe morbidity. The average length of the morbidity is not known at present, but is assumed to be 5 years. This means that the total indicator value in the environmental system is (5/24)*(0.38/0.62)*15.4 = 1.96 person-years of severe morbidity.
Contribution to category indicators value from a flow unit
The same contribution as in "Cr air emissions impact on YOLL" is valid, i.e. 1/75000 per kg arsenic.
Calculation of characterisation factor
This would mean that the characterisation factor would be 1.96/75000 = 2.62E-05 person-years/ kg chromium.
|Steen B (1999b): A systematic approach to environmental priority strategies in product development (EPS). Version 2000 – Models and data of the default method CPM report Chalmers University of Technology Sweden|
|The residence time in air for particles is in the order of days to weeks depending on particle size, precipitation, and concentration of other particles and condensable gases. In terms of contribution to population exposure urban populations are receiving the highest doses and mainly from their local sources. The background levels are low compared to urban levels, which means that the trans-boundary pollution may be neglected. Considering an incubation time of the order of 20 years, and that most of the data available are from 1985 the system is defined as Sweden at the state of 1985 during 20 years. As the effects are regarded to be linear, only the year 1985 is studied and assumed to be representative for the 20-year period.|
|Characterisation Parameter||Category Indicator||Impact Indication Principle||Aspect||Substance||Quantity||Unit||Notes|
|Cr||2.62E-05||p yr/kg||Cancer pathway|