Cal e-GGRT Help

Q330. If a natural gas common pipe is connected to a series of small combustion units and a subpart D unit, how should emissions be reported?

Note: The Cal e-GGRT help system includes general instruction on using the California GHG reporting tool. However, the help system may not explain differences between California and U.S. EPA reporting requirements. Please refer to the ARB reporting website for California-specific reporting requirements and additional help.

Created by Mark Palmer, last modified on Jun 15, 2011

As described in 40 CFR 98.36(c)(3), the common pipe reporting configuration may be used for the small combustion units. If a portion of the fuel serving a common pipe is diverted to a flare, another stationary fuel combustion unit (or units), a chemical or industrial process, or a Part 75 unit (Subpart D or 98.33(a)(5)), company records may be used to subtract out the diverted fuel stream from the fuel served to the units in the common pipe configuration. The emission reporting for the subpart D unit would be unaffected by how the emissions are calculated for the common pipe configuration.