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Title: Natural Gas Transmission And Distribution Methane Emissions
Author: Lori S. Traweek
Source: American Gas Association 1990
Year Published: 1990
Abstract: In response to a request by the US. Environmental Protection Agency (EPA), the American Gas Association has surveyed a group of natural gas companies to determine the amount of methane emitted during natural gas distribution and transmission. A.G.A.s findings indicate that 0.30 percent of total gas consumed in the United States was emitted during transmission and distribution operations in 1988. Separating transmission and distribution methane emissions as a percent of gas sold and transported during 1988 yields the following. Transmission -0.6 percent Distribution -0.28 percent The percent of total sales does not equal the sum of the transmission and distribution percents because a fraction of gas sales moves through distribution but not transmission and vice versa. Coinciding with the A.G.A. survey, Pacific Gas and Electric Company has completed a comprehensive project to identify and quantify the components of its unaccounted-for gas (UAF) for the year 1987. The Gas Research Institute co-sponsored the study. PG&E operations consist of both transmission and distribution systems. The results of this comprehensive study are consistent with A.G.A.s findings. Emissions attributable to distribution and transmission operations accounted for 0.14 percent.

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