The preparation of FEDEFL Inventory Methods required the identification of all flows from the FEDEFL that belong within each of the groupings.

For the mineral grouping and pesticide grouping, FEDEFL flows were identified based on their presence in mapping files where related flow lists from external sources were mapped to FEDEFL flows. A flow mapping consists of matched flowables, contexts and units.  Flowables are the name of the material or energy that comes from or goes to the biosphere (commonly referred to as substance). Context is a set of environmental media/compartments that describe the flow origin or destination (e.g., “air”). To create the mapping files exact flowable mappings were identified based on CAS number or substance name followed by manual identification of common flows.  These mappings follow the flowmapping format @ https://github.com/USEPA/Federal-LCA-Commons-Elementary-Flow-List/blob/v1.0.7/format%20specs/FlowMapping.md
For minerals, this mapping was from the U.S. Geological Survey Mineral Commodity Summaries (USGS 2021) to the FEDEFL v1.0.7. The associated file is USGS_MCStoFEDEFLv1.0.7.csv.
For pesticides, this mapping was from the U.S. Department of Agriculture Chemical Use Survey (USDA 2021) to the FEDEFL v1.0.7. The associated file is USDA_CUStoFEDEFLv1.0.7.csv. 

The hazardous air pollutants (HAPs) flows were identified by extracting flowables from a list of HAPs published by the EPA under the Clear Air Act which is reformatted and included as HAPS_flows.csv. These were extracted with a script in the fedelemflowlistv1.0.7 tool (https://github.com/USEPA/Federal-LCA-Commons-Elementary-Flow-List/blob/v1.0.7/scripts/write_HAP_flows.py). These flowables were matched by name or CAS and we applied logic to subset the FEDEFL flows for those with matching flowables that are in the Context "Emission/air".

Flows belonging to the other groupings are identified by applying specific rules for subsetting the FEDEFL for that grouping.

Subsetting Rules:
land use: flows in the Class "Land"
water resources: flows with the Flowable name "Water" that are in the Context "Resource" except those that are resources from air.
freshwater resources: flows with the Flowable name "Water, fresh" that are in the Context "Resource" except those that are resources from air.
energy: flows that use the Unit "MJ" or that contain the Flowable names "Uranium", "Biomass", "Hardwood", "Softwood", "Wood". These flows are in the Context "Resource"
nonrenewable energy: flows that are included in the energy grouping that are not in Class "Biological" or "Energy"
renewable energy: flows that are included in the energy grouping that are in Class "Biological" or "Energy"

All of these subsetting rules are encoded in the fedelemflowlist subset_list.py module for fedelemflowlistv1.0.7
https://github.com/USEPA/Federal-LCA-Commons-Elementary-Flow-List/blob/v1.0.7/fedelemflowlist/subset_list.py

References
USDA 2021. “Agriculture Chemical Use Survey.” https://www.nass.usda.gov/Surveys/Guide_to_NASS_Surveys/Chemical_Use/index.php
USGS 2021. "Mineral Commodity Summaries". https://www.usgs.gov/centers/nmic/mineral-commodity-summaries