Q338. For Tier 3, if I have multiple combustion sources using a single fuel type, should I enter this as an aggregation of units?
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.

While it is possible for an aggregation of units to use Tier 3 for certain fuel types, it is important to remember that the aggregation of units option is only allowed if each unit in the group is smaller than 250 mmBtu/hr. If the use of Tier 3 is required because any given unit is larger than 250 mmBtu/hr, the use of the aggregation of units option would not be allowed.

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