For the purposes of this chapter, the following words and phrases shall have the meanings respectively ascribed to them by this section:
(a) "B.O.D." or biochemical oxygen demand means the quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedure in five days at 20 degrees C., expressed in parts per million by weight.
(b) "Building drain" means that part of the lowest horizontal piping of a drainage system which receives the discharge from soil, waste and other drainage pipes inside the walls of the building and conveys it to the building sewer, beginning five feet outside the inner face of the building wall.
(c) "Building sewer" means the extension from the building drain to the public sewer or other place of disposal.
(d) "Combined sewer" means a sewer receiving both surface runoff and sewage.
(e) "Garbage; properly shredded garbage" means solid wastes from the preparation, cooking and dispensing of food, and from the handling, storage and sale of produce; and the term "properly shredded garbage" means the wastes from the preparation, cooking and dispensing of food that has been shredded to such degree that all particles will be carried freely under the flow conditions normally prevailing in public sewers, with no particle greater than one-half inch in any dimension.
(f) "Industrial wastes" means the liquid wastes from industrial processes as distinct from sanitary sewage.
(g) "Manager" means the Manager of the Sanitary Board of the City or his authorized deputy, agent or representative.
(h) "Natural outlet" means any outlet into a watercourse, pond, ditch, lake or other body of surface or ground water.
(i) "pH" means the logarithm of the reciprocal of the weight of hydrogen ions in grams per liter of solution.
(j) "Public sewer" means a sewer in which all owners of abutting properties have equal rights and which is controlled by a public authority.
(k) "Sanitary sewer" means a sewer which carries sewage and to which storm, surface and ground water are not intentionally admitted.
(l) "Sewage" means a combination of the water-carried wastes from residences, business buildings, institutions and industrial establishments, together with such ground, surface and storm waters as may be present.
(m) "Sewage treatment plant" means any arrangement of devices and structures used for treating sewage.
(n) "Sewage works" means all facilities for collecting, pumping, treating and disposing of sewage.
(o) "Sewer" means a pipe or conduit for carrying sewage, storm water, surface water or any combination thereof.
(p) "Storm sewer or drain" means a sewer which carries storm and surface waters and drainage, but excludes sewage and polluted industrial wastes.
(q) "Suspended solids" means solids that either float on the surface of, or are in suspension in water, sewage, or other liquids and which are removable by laboratory filtering.
(r) "Watercourse" means a channel in which a flow of water occurs, either continuously or intermittently.
(1975 Code Sec. 15-1)