Calculation of the Composite Risk Index

7 Calculation of the Composite Risk Index. The composite risk index for the chemical and radioactive components of electric arc furnace waste is given by  

Using the separate risk indexes for chemicals that cause deterministic effects, chemicals that cause stochastic effects, and radionuclides obtained in Sections 7.1.7.4 to 7.1.7.6, the composite risk index for all hazardous substances in the waste is given by  

This result is much less than unity. Therefore, based on the assumptions used in this analysis, the electric arc furnace waste would be classified as low-hazard. 

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This Section provides example calculations of the composite risk index for a simple, hypothetical waste that contains a mixture of substances that cause stochastic or deterministic effects. Application of the risk index in classifying real wastes is considered in Section 7.1. 

Calculation of the composite risk index for the purpose of waste classification based on the simplified Equation 6.8 is illustrated using the hypothetical data given in Table 6.1. Consistent with the form of the risk index in Equations 6.3 and 6.8, risk indexes for individual hazardous substances in Table 6.1 are expressed as the ratio of a... 

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