Regarding used oil storage and treatment (art. 5 of RD 679/2006):

1. Waste oil producers must meet the following requirements:

• Store oils in appropriate conditions, notably avoiding mixing with water or other non-oily residues; also avoid mixtures with other oily residues if this makes proper management difficult.
• Have facilities that permit the storage of oils until collection and that are accessible to the vehicles responsible for this.
• Prevent waste oil deposits, including underground, having harmful effects on the soil.

2. In general, the following actions are prohibited:

• Any discharge of waste into surface water or groundwater in any area of ¿¿the territorial sea and sewer systems or residual water disposal.
• Any discharge of waste oil or waste derived from its treatment, on the ground.
• All waste oil treatment causing atmospheric contamination exceeding the level established by the legislation on protection of atmospheric ambient air pollution.

3. Waste oil producers that generate more than 500 litres per year, as well as the waste oil managers, shall hold a record book with data relating to quantities, quality, origin, location and dates of delivery and receipt. The keeping of this record book, and registration as producers in the Waste Management and Production Record Book for the corresponding Autonomous Community will exempt these producers in compliance with that set out in article 22.1 of Royal Decree 833/1988 of 20th July, which approves the Regulation for the execution of Law 20/1986 of 14th May on Basic Toxic and Hazardous Waste.

4. The transportation of waste oils between Spain and other countries, including those belonging to the European Union, will take place in accordance with the provisions of Regulation (EEC) No. 259/93 of 1st February 1993 on the supervision and control of waste shipments, into and out of the European Community. The relevant and necessary authorisations shall be subject to the constitution of liability insurance or shall provide a deposit, bank guarantee or other financial guarantee covering the costs of transport and recovery.

Regarding used oil delivery (art. 6 of RD 679/2006):

1. In accordance with article 11.1 of Law 10/1998 of 21st April, producers and holders of waste oils are obliged to ensure delivery to an authorised manager for this purpose, for proper management, unless they manage it themselves with the corresponding permission.

2. For the purposes of the provisions of the preceding paragraph, producers and holders of waste oils may deliver them directly to a licensed waste contractor for that end or make said delivery to producers of industrial oils. In the latter case, the producers are obliged to take responsibility for the waste oils and to pay market price for them, if this is positive, up to an amount of waste oil calculated based on the amount of new oil placed by them on the domestic industrial oil market, considering the average waste oil generation percentages derived from the same.

3. Once producers have taken responsibility for the waste oils, according to the provisions of the preceding paragraph, they shall be considered as producers of said waste oils and must also ensure they are managed in accordance with the order of preferences established in article 7 and that article 8 ecological targets are met. Delivery of waste oils to authorised operators shall take place in compliance with the notification and identification requirements and other requirements established in this Royal Decree and in the waste legislation.

4. The delivery of waste oils carried out by the producers to waste oil managers will be formalised in a "control and monitoring document" which shall contain at least the information specified in annex II.

5. Collection and transportation of industrial waste oils must be carried out by authorised managers.