1. Decision Y2/2600, Quality of water for human consumption, Official J., 892/11-7-2001.
2. S.I. No. 294/1989: European Communities (Quality of Surface Water Intended For The Abstraction of Drinking Water) Regulations, 1989.
3. Legislative Decree 152. 2006. (G.U.n.. 88, 14/04/2006 — Ordinary Supplement n. 96)
4. APHA, AWWA, WEF. Standard Methods for the Examination of Water and Wastewater, 1971, XIIIth ed.
5. United States EPA: 1978. Petroleum hydrocarbons, total recoverable, Method 418.1. Storet No 45501