Viru Keemia Grupp (VKG) is an Estonian holding group of oil shale industry, power generation, and public utility companies.The subsidiary producing shale oil is VKG Oil. The company utilizes two different processes: Kiviter and Galoter.The company also tested but rejected the Alberta Taciuk Process. In total, VKG Oil processes 2 million tons of oil shale per year, producing 250,000 tons of shale oil.The company operates several Kiviter retorts, the largest of them having a processing capacity of 40 tonnes per hour of oil shale feedstock. In December 2009, VKG Oil opened a new Galoter retort called Petroter.Engineering of the retort was done by Atomenergoproject of Saint Petersburg; engineering of the condensation and distillation plant was done by Rintekno of Finland. The plant has a processing capacity of 1.1 million tonnes of oil shale per year and it produces 100,000 tonnes of shale oil, 30 million cubic metres (1.1×109 cu ft) of oil shale gas, and 150 GWh of steam per year. The company plans to start construction of a second Petroter plant in 2012.In 2008, the company received a permit for developing the Boltysh oil shale deposit in Ukraine.In April 2011, VKG acquired assets of a bankrupt company Silbet Plokk that manufactured cinder blocks for construction from oil shale burning residue.The company was renamed VKG Plokk.