Hazard classification for the 200-ZP-1 Operable Unit Phase 2 and 3 interim remedial measure

摘要

This safety assessment documents the Final Hazard Classification (FHC) for Phase 2 and 3 interim remedial measure (IRM) activities to be conducted in the 200 West Area of the Hanford Site. The 200-ZP-1 Phase 2 and 3 IRM activities will involve the air stripping of carbon tetrachloride (CCl4) from extracted groundwater using a packed-bed stripper column followed by gas-phase adsorption of the CCl4 from the stripper off-gas onto a granular activated carbon (GAC) bed. For Phase 2, which includes the initial year of operation, it is planned to operate the stripper at 568 L/min (150 gal/min). The process flow diagram for the Phase 2 and 3 system is shown.