1.A CO 2 stream shall consist overwhelmingly of carbon dioxide. To this end, no waste or other matter may be added for the purpose of disposing of that waste or other matter. However, a CO 2 stream may contain incidental associated substances from the source, capture or injection process and trace substances added to assist in monitoring and verifying CO 2 migration. Concentrations of all incidental and added substances shall be below levels that would:
adversely affect the integrity of the storage site or the relevant transport infrastructure;
pose a significant risk to the environment or human health; or
breach the requirements of applicable Community legislation.
2.The Commission shall, if appropriate, adopt guidelines to help identify the conditions applicable on a case by case basis for respecting the criteria laid down in paragraph 1.
3.Member States shall ensure that the operator:
accepts and injects CO_{2} streams only if an analysis of the composition, including corrosive substances, of the streams and a risk assessment have been carried out, and if the risk assessment has shown that the contamination levels are in line with the conditions referred to in paragraph 1;
keeps a register of the quantities and properties of the CO_{2} streams delivered and injected, including the composition of those streams.