§ Mr. Norman Hoggasked the Secretary of State for Employment, for each of those substances with a threshold limit value which are indicated as cancer-causing agents in the Health and Safety Executive's publication guidance note EH15 "Threshold Limit Values", what proportion of persons is likely to be affected by cancer excess at the threshold limit value.
§ Mr. MayhewThreshold limit values represent concentrations of substances to which it is believed that nearly all workers may be repeatedly exposed day after day without adverse effect to their health. As a result of variations in individual susceptibility, a small proportion of persons may be affected by development of an occupational illness at concentrations at or below the threshold limit value. It is not possible to determine this proportion accurately because of the multiplicity of occupational and non-occupational factors involved.
§ Mr. Norman Hoggasked the Secretary of State for Employment if he will list in the Official Report the names of those substances which, while not indicated as cancer-causing agents in the Health and Safety Executive's publication guidance note EH15 "Threshold Limit Values", are known to the Health and Safety Executive as being highly suspect cancer-causing agents.
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§ Mr. MayhewI am informed by the chairman of the Health and Safety Commission that there are no highly suspect cancer-causing agents which are known to the HSE, other than those listed in its guidance note EH15.