delimitates the area so that hygiene and security are excluded as well as management of natural resources. The full sequence of EPEA are compiled through five different tables that interact with one another. The tables are established, just like the national accounts on a double-entry bookkeeping system. They were developed this way so that consistent indicators with the national accounts could be ensured. The tables cover statistics on production of environmental protection activities, the use of environmental protection services (e.g. waste management or waste water management services), how the financing of environmental protection happens and a supply and use tables and net cost of environmental protection (what is the final expenditure and who is bearing the expenditure.) Collecting the underlying statistics The EPEA framework consists of five different tables and covers the economy and the transactions of it. In order to fill the tables several different data sources need to be collected and attributed to the correct place in the framework tables. The data sources would be taken from existing information such as the National accounts, from business statistics or government finance statistics. But sometimes a statistical office would need to undertake a special investigation to find the correct information. Specialised producers Specialised producers of environmental protection services are defined as activities that are focused on servicing the environment. That means waste management activities and activities for waste water management: "all those producers whose principal activity is the production of environmental protection (EP) services, regardless of whether they belong to the private or public producers group or if they carry out market or non-market activities" Businesses undertaking e.g. waste management can be either market or non-market actors. This means that they're either owned by a public entity (such as a local government) or by a private actor. It is important to the EPEA tables that this distinction is made in the statistics. If statistics are published according to e.g. International Standard Industrial Classification economic statistics for the following codes could be collected: Division E – Water supply; sewerage, waste management and remediation activities ISIC 37 – Sewerage ISIC 38 – Waste collection, treatment and disposal activities; materials recovery ISIC 39 – Remediation activities and other waste management services Secondary non-specialised producers Secondary non-specialised producers are actors that performs environmental protection services but not as a primary activity. This means for example that a business in the chemical industry sells excess