For the purposes of this article, the following definitions shall be used:
The period of time indicated by the dates, approximately one month apart, appearing on utility bills to show the period of service for which that bill applies.
Unintended loss of water from an underground water line, on privately owned property, which is outside a building or structure.
The period of time, approximately three months, between actual readings of the same utility meter.
The amount of water lost as a result of a leak verified in accordance with § 623-28A of the Municipal Code, and calculated by subtracting the amount of water used in the usage period preceding the occurrence of the leak from the amount of water used in the current usage period.