(a) No person shall discharge or cause to be discharged any storm water, surface water, ground water, roof runoff, subsurface drainage, cooling water or unpolluted industrial process waters to any sanitary sewer.
(b) Storm water and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers or storm sewers or to a natural outlet approved by the Manager. Industrial cooling waters or unpolluted process waters may be discharged, upon approval of the Manager, to a storm sewer, combined sewer or natural outlet.
(1975 Code Sec. 15-3, 15-4)