The Lavrion Underground Hazardous Waste Repository is developed as a part of the restoration of the Lavrion Technological and Cultural Park (LTCP) site. It is designed to store approximately 5000 tn of hazardous waste (with monitoring and retrievability option), having high concentrations of heavy metals and toxic metalloids, such as arsenic, lead, cadmium and zinc, deriving from the restoration of the LTCP site. The repository is constructed under low overburden using the room and pillar mining technique, forming 7 m wide pillars. The total area of the repository is almost 2.475 m2
while the available space is around 1.900 m2 . It is accessed through a 11% inclined tunnel with a length of 170 m and with a 35 m deep shaft. The repository was commissioned in 2009. The Repository visit can continue with a tour of the LTCP which stands where the old “French Company of Lavrion Mines” facilities used to be. As in similar cases around the world, the abandoned industrial buildings, machinery etc were rescued and given to the student and the local communities as a technology and culture centre.