Pesticide records in biological archives can serve as another proxy indicator for human impact. Such records can result from intensification in agricultural activity or -close to production sites -of industrial activity. In the past, organochlorine pesticides (OCP) have been used intensively, beginning with World War 2. Two very well-known representatives, DDT (dichlorodiphenyltrichloroethane) and lindane (HCH, hexachlorocyclohexane) were produced and used widely in the 1940s to 1980s.