All measurements, tests, and analyses of the characteristics of waters and wastes to which reference is made in these regulations, shall be determined in accordance with the latest edition of Standard Methods for the Examination of Water and Sewage and shall be determined at the control manhole provided, or on suitable samples taken at that control manhole. In the event that no special manhole has been required, the control manhole shall be considered to be the nearest downstream manhole in the public sewer to the point at which the building sewer is connected.
(1980 Code 50.18)