1. Decision Y2/2600, Quality of water for human consumption, Official J., 892/11-7-2001.
2. Ministerial Decision 46399/1352, Quality of surface waters intended for drinking water supplies, Official J., 438/3-7-1986.
3. Common Ministerial Decision 179182/656, Concerning the disposal in the marine area of Keratsini of wastewater originated from industrial activities in greater Athens area, through the sewer system and streams that are supervised by OAP, Official J., 582B/2-7-1979.
4. APHA, AWWA and WEF, Standard Methods for the Examination of Water and Wastewater. American Health Public Association, 20th ed., Washington DC, 2000.
5. EPA, Method 1664: N-Hexane Extractable Material (HEM) and Silica Gel Treated Extractable Material (SGT-HEM) by Extraction and Gravimetry, Office of Water Engineering and Analysis Division, Washington DC, 1995.