69-ME4211 - of 8 and above should, as for ecotoxicity, be...

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3.2 Human toxicity 1
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(i) Exposure score (a) Determine the substance’s exposure score as described above under ecotoxicity . 2
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(ii) Toxicity score (a) Determine the substance’s toxicity score on the basis of the criteria in Table 4.15. (b) If the substance is not included in the official list of hazardous substances, assign it a toxicity score of 4 unless it is well known and regarded as being without significant hazardous impacts. The criteria for assignment of toxicity score are given in Table 4.15. A substance can have several different toxic impacts, but the toxicity score is assigned after the impact giving the highest score in Table 4.15. 3
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(iii) Toxicological impact score (a) Determine the substance’s toxicological impact score as the product of exposure and toxicity scores . (•) If the goal of the screening is to focus work in a quantitative assessment, all emissions having toxicological impact scores
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Unformatted text preview: of 8 and above should, as for ecotoxicity, be selected . 4 4. Procedure for Sensitivity Analysis The sensitivity analysis investigates the significance of the assumptions for the total result and for the conclusions to be reached on that basis. (i) Identify the assessments key figures, i.e. the most important modeling assumptions, processes and environmental changes. (ii) Identify the most important impact assessment factors . Reason for sensitivity analysis The sensitivity analysis is carried out after the impact assessment phase of the LCA, in order to utilise the knowledge of the environmental exchanges potential impact contribution that is introduced here, for the assessment of which exchanges are the most significant, which are of no significance in the total picture. 5...
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This note was uploaded on 12/07/2011 for the course ME ME4211 taught by Professor Dr.a.vyas during the Winter '11 term at NYU Poly.

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69-ME4211 - of 8 and above should, as for ecotoxicity, be...

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