Inventering och bedömning av förorenade områden inom division Energi, Tekniska Verken i Linköping

Sammanfattning: This thesis was commissioned by Tekniska verken, Energy Division with the overall aim to investigate the concept of environmental debt and what it means for a business. Furthermore, a sustainable risk and responsibility investigation shall be carried out on the concerned areas. Finally, the priority areas shall be highlighted and proposed actions presented.   The Swedish Environmental debt concept was presented in 1992 by Arne Jarnelöv. Environmental debt is defined as restoration costs for environmental damage. In the early days the concept did not take into account who was responsible, but the environmental debts was regarded as a humanity debt to future generations. For a company an environmental debt means that you are legally responsible for the debt under the Swedish environmental law. It also means that the remedy cost is to be accounted for. Environmental liabilities can be a significant problem in a company's sustainability efforts and contaminated areas can also lead to the company gaining a reputation for undertaking of environmentally hazardous activities. The responsibility for deposited waste is primarily with the depositor and secondly with the landowner.   The inventory and compilation show that the Energy division has two properties with major pollution problems.   At the KV1 site a gas works was operating for 60 years contributing to widespread pollution. Impregnated poles were also stored at two different locations at the site. Finally, 30-50 m below the KV1 site is a 90 000 m³ large cavern used during the cold war for emergency storage of high-sulfur thick oil. The oil storage ended in the beginning of the 1990s but an estimated 2 000 m³ of oil is left on the surface and in cracks in the rock face. The cavern is not clad which means that the oil was stored on a water bed directly against the rock wall. Today the water surface is kept at a lower level to prevent spreading of oil pollution. Remediating caverns is complicated and cost a lot of time. The company has to leave the site within the next 30 years, which makes a plan of action for different pollution situations crucial.   The Kallerstad landfill is the next prioritized site. It was in operation from 1955 to 1973.  Large amounts of household and industrial waste was deposited in the early years. In 1958 the first waste incineration power plant was built at the KV1 site and the deposit was limited to none combustible waste. The landfill is located in an old mud pit which reduces the risk of spreading. The landfill was in municipal ownership and operation until 1961 when Tekniska Verken took sole ownership and operation.   On some of the hydropower stations other activities has been contaminating sediment and soil. On a few properties there have been oil leaks which have been remedied to currently approved levels.   It is of great importance for business enterprises to obtain an overall picture of their environmental debts as they beside the financial burden might potentially need environmentally hazardous activities to remedy. All contaminated properties within the Energy division should have excavation procedures in place. As remediation of oil caverns is a time consuming activity a preliminary investigation into the KV1 site cavern should be initiated as soon as possible. An excavation procedure should be established for the KV1 site. A dialogue to determine the responsibility relationship between the municipality and Tekniska Verken should be established about the