High concentration of heavy metals and carcinogens in samples of animal products

Answer in writing ​EU research in 2016 has shown an alarmingly high concentration of heavy metals in samples of animal products. This disturbing situation unfortunately includes Greece. These problems have been observed in cattle, pigs, poultry, rabbits, as well as honey, milk and eggs across the food chain, with high concentrations of cadmium, mercury, copper and lead, which are classified as carcinogens. ​

In view of this:​
Since used fertilisers and recycled materials are often the cause and source of those carcinogens, how are food products monitored in the EU and in which particular cases have prohibited concentrations of carcinogens been found in food products?