Case C-60/18: Judgment of the Court (Second Chamber) of 28 March 2019 (request for a preliminary ruling from the Tallinna Ringkonnakohus — Estonia) — Tallinna Vesi AS v Keskkonnaamet (Reference for a preliminary ruling — Environment — Waste — Directive 2008/98/EC — Re-use and recovery of waste — Specific end-of-waste criteria for sewage sludge which has undergone recovery treatment — No defined criteria at European Union or national level)