A. 
Definitions. Unless the context specifically indicates otherwise, the meaning of the terms used in this Part 1 shall be as follows:
BOD (denoting "biochemical oxygen demand")
The quantity of oxygen utilized in the biochemical oxidation of organic or other unstable matter under standard laboratory procedure in five days at 20° C., expressed in parts per million by weight.
BUILDING SANITARY DRAIN
That part of the lowest horizontal piping of a building sanitary drainage system which receives the discharge from waste piping inside the walls of the building and conveys such discharge to the building sewer lateral beginning three feet outside the outer face of the building wall.
BUILDING SEWER LATERAL
That part of the horizontal piping of a sanitary system which extends from the end of the building sanitary drain and conveys sewage to a public sewer, individual sanitary disposal system or other approved facility.
CROSS-CONNECTIONS
Any physical connection or arrangement between two otherwise separate piping systems, one of which contains potable water and the other water of unknown or questionable safety, whereby water may flow from one system to the other, the direction of the flow depending on the pressure differential between the two systems.
DRAINAGE OUTLET
Any outlet into a watercourse, pond, ditch, lake or other body of surface or ground water.
GARBAGE
Solid wastes from the handling, storage and sale of produce.
INDUSTRIAL WASTES
The liquid wastes resulting from the processes employed in industrial establishments and which are free of fecal matter.
INTERCEPTOR
A device designed and installed so as to separate and retain deleterious, hazardous fecal matter or otherwise undesirable matter such as grease, oil or sand from normal or industrial wastes and permit only normal sewage or liquid wastes to discharge into the disposal terminal by gravity.
PERSON
Any individual, firm, company, association, society, corporation or group.
pH
The logarithm of the reciprocal of the weight of hydrogen ions in grams per liter of solution.
PLUMBING INSPECTOR
The person or persons duly authorized by the Town Board to inspect and approve the installation of building sewer laterals and their connection to the public sewer system.
PRIVATE SEWER or INDIVIDUAL SANITARY DISPOSAL SYSTEM
A sewer privately owned and not directly serviced by public authority.
PROPERLY SHREDDED GARBAGE
The wastes from the preparation, cooking and dispensing of food that have been shredded to such degree that all particles will be carried freely under the water-flow conditions of the device and flow prevailing in public sewers, with no particle greater than 1/2 inch in any dimension.
PUBLIC SEWER
An approved sewer directly controlled by public authority.
SANITARY SEWER
A pipe which carries sewage and excludes storm-, surface and ground water.
SEWER
Any liquid waste containing animal or vegetable matter in suspension or solution, and may include liquids containing chemicals in solution.
SEWAGE WORKS SYSTEM
All facilities for collecting, pumping, treating and disposing of sanitary sewage.
SEWAGE
A pipe or conduit for carrying sewage.
SLOPE
The grade or pitch of a line of pipe in reference to a horizontal plane. In drainage it is usually expressed as the fall in a fraction of an inch per foot length of pipe.
STORM SEWER or STORM DRAIN
A drain used for conveying rainwater, surface water, condensate, cooling water or similar liquid wastes, exclusive of sewage and industrial waste.
SUPERINTENDENT
The Superintendent of Sewers for the Town of Boston as appointed by the Town Board, or his authorized deputy, agent or representative.
SUSPENDED SOLIDS
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.
WATERCOURSE
Natural or man-made drainage channel in which a flow of water occurs, either continuously or intermittently, other than a roadbed rain ditch within the public right-of-way.
B. 
Word usage. "Shall" is mandatory; "may" is permissive.