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Title: Determination Of Leakage And Unaccounted-For-Gas In Distribution Systems
Author: W. G. Neahr
Source: 1965 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1965
Abstract: Leakage and unaccounted-for, lost and unaccounted-for, or more simply, L & U, is a grammatically inelegant term for a special and persistent annoyance common to all gas distribution companies. Leakage and unaccounted-for gas is recorded in the L & U report, a monthly balance of sales and purchases, the difference between the two figures being the L & U. Now leakage and unaccounted-for gas represents a real loss to revenue, so it is undesirable. An exact balance of purchases and sales would be better from the revenue standpoint, and an excess of sales over purchases would be best of all. Yet a reasonable monthly L & U is considered normal an excess of sales over purchases will raise questions of the accuracy of the report and, if by some miracle of chance, purchases and sales are exactly equal, no one will believe the report at all.

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