Flammable Liquid Storage
- Aboveground Flammable-liquid Tanks (EEEV)
- Protected Aboveground Tanks for Flammable & Combustible Liquids (EELU)
- Fire-resistant Tanks for Flammable & Combustible Liquids (EEZI)
- Special-purpose Tanks (EFVT)
- Underground Tank Lining Systems (EGAY)
- Underground Tanks (EGHX)
- Underground Tank Upgrade Systems (EGSJ)
- Below-grade Vaults for Flammable-liquid Storage Tanks (EHOJ)