No. 283 DECREE ON PRECAUTIONARY MEASURES FOR THE PROTECTION OF WATER April 6,1962 Section 1 (27.6.19801499) No industrial or comparable facility may release or conduct into the groundwater or water system such proportions or quantities of environmentally hazardous substances as will result in pollution of the water. The hazardous substances referred to above in para- graph 1 include: l ) radioactive substances; 2) l , l, l-trichlorine-2,2 bis (chloropheny1)-ethane and the polychlorinated phenyls and their derivatives; 3) mercury and cadmium and their compounds; 4) hydrocyanic acid and its salts, apart from soluble salts, and acrylonitrile and cyanochloride; 5 ) arsenic, chromium (valency six), lead, nickel, selenium, uranium and thallium, and their compounds; 6) polyhalogenated phenols and other phenol derivatives with equally hazardous impact on the water system; 7) nitrobenzene and nitrosoarnine: and 8) a substance and product containing a pesticide declared toxic under the curren...