Naples, September 12 - A spot check by anti-mafia investigators for infiltration by organized crime gangs of restoration works at the Pompeii archaeological site came up clean, authorities said Thursday. The investigators inspected construction companies as well as 20 individuals involved in the Great Pompeii Project, which has drawn 105 million euros in support from the European Union. That kind of money makes the project a potential magnet for organized crime. The Great Pompeii Project has become something of a symbol for Italian authorities, who want to demonstrate the country can preserve and protect a world famous archaeological site - both from physical decay as well as corruption by the local mafia, the Camorra. Collapses in parts of 2,000-year-old Pompeii, a UNESCO World Heritage site, in recent years has raised international concern about Italy's ability to protect the site.