UNACCOUNTED-FOR-GAS
§ 59.111. Unaccounted-for-gas.
(a) Definitions. The following words and terms, when used in this section, have the following meanings, unless the text clearly indicates otherwise:
Adjustments—Gas used by an NGDC or city natural gas distribution operation for safe and reliable service, such as company use, calculable losses from construction, purging, storage migration, other temperature and pressure adjustments, and adjustments for heat content of natural gas.
Gas delivered—Gas provided by the distribution, transmission, storage or production/gathering facilities of an NGDC or city natural gas distribution operation, regardless of use, adjusted for temperature or pressure variations. This category includes quantities of gas consumed by an end user, exchange gas supplied to another utility, gas delivered to transportation customers or other gas delivered to a user other than the utility. When bill timing issues arise, an effort shall be made to reasonably estimate consumption.
Gas received—Gas that is supplied to the distribution, transmission, storage or production/gathering facilities of an NGDC or city natural gas distribution operation, regardless of use, adjusted for temperature or pressure variations. This category includes gas for sales, storage, transportation quantities, exchange gas received or other quantity of gas that otherwise enters the utility’s facilities.
NGDC—Natural gas distribution company.
UFG—Unaccounted-for-gas—The difference between the total gas available from all sources and the total gas accounted for as sales, net interchange and company use. This difference includes leakage or other actual losses, discrepancies due to meter inaccuracies, variations of temperatures or pressures, or both, and other variants, particularly billing lag.(b) Calculation.
(1) UFGx = Gas Receivedx - Gas Deliveredx - Adjustmentsx
(2) %UFGx = (UFGx/Gas Received) * 100
(3) X denotes the system type (distribution, transmission, storage or production/gathering). When possible, UFG must be computed and reported by system type.
(4) Gas received, gas delivered and adjustments must represent actual gas quantities. Estimates may be provided but must be clearly identified and have supporting justification, assumptions and calculations.
(5) Adjustments must be individually identified by category (such as company use, calculable losses from construction, purging, storage migration, other temperature and pressure adjustments, and adjustments for heat content of natural gas). Adjustments must be supported by metered data, sound engineering practices or other quantifiable results that clearly support the utility’s need for the adjustment. Adjustments must be consistent from filing to filing.
(6) The definition of ‘‘UFG’’ in subsection (a) and the calculation under this subsection apply to UFG filed with the Commission.
(c) Metrics for distribution system losses.
(1) Each NGDC and city natural gas distribution operation shall, at a minimum, reduce distribution system loss performance in accordance with the metrics in the following table, beginning with its first subsequent Purchased Gas Cost (PGC) or Gas Cost Rate (GCR) filing after August 11, 2014. The metric starts with 5% in the first year and decreases by 0.5% every year in the subsequent years until it reaches 3% as shown in the following table:
Year Percent UFG 1 5.00% 2 4.50% 3 4.00% 4 3.50% 5 3.00% (2) The distribution metrics shall be applied on an annual basis for the 12 months ending August 31. UFG reports, as described by the Commission and relating to this section, shall be filed by September 30th of each year.
(3) UFG levels above the applicable annual targets in paragraph (1) shall be presumed to be excessive absent evidence to the contrary and may not be recovered within the current or a future PGC or GCR filing. If an NGDC’s actual UFG exceeds an applicable target, the NGDC may demonstrate that its level of UFG is warranted.
Authority The provisions of this § 59.111 issued under the Public Utility Code, 66 Pa.C.S. § § 501, 504, 523, 1301, 1501 and 1504.
Source The provisions of this § 59.111 adopted August 9, 2013, effective August 10, 2013, 43 Pa.B. 4586.
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