The ratio of the highest estimated or actual level of exposure to a pesticide and the toxic threshold level (usually the NOEC or NOEL). See also: Uncertainty Factor
Health and Safety Executive (HSE), Pesticides Glossary, Merseyside, England, UK 2014. www.pesticides.gov.uk/guidance/industries/...group s/.../pesticides-glossary, (Hlth and Sfty - Brit) {720}