NOVELTY - Chemicals are extracted from groundwater remediation aqueous effluent by contacting a critical fluid with an aqueous effluent including water and chemical components at a selected temperature and pressure. The critical fluid dissolved with chemical components is removed from the aqueous effluent, and the dissolved chemical components are recovered.    USE - For extraction of chemicals from groundwater remediation aqueous effluent.    ADVANTAGE - The inventive method separates and recovers high-value chemicals from the remediation effluent and minimizes the volume of generated hazardous waste. It reduces the cost and increases the economic viability of the SEAR or SEAR-NB process. The recovered chemicals can be recycled to the remediation process or stored for later use.    DETAILED DESCRIPTION - Extraction of chemicals from groundwater remediation aqueous effluent involves contacting a critical fluid with an aqueous effluent including water and chemical components at a selected temperature and pressure, such that the chemical component(s) is dissolved in the critical fluid. The critical fluid dissolved with chemical components is removed from the aqueous effluent, and the dissolved chemical components are recovered.    An INDEPENDENT CLAIM is also included for a system for extraction of chemicals from groundwater remediation aqueous effluent, comprising a groundwater remediation system (20), an injection system (26), an injection well(s), and a critical fluid extraction treatment facility (40). The groundwater remediation system comprises a process chemical feed (22) and a process water feed (24). The critical fluid extraction treatment facility receives the aqueous effluent from the well. It comprises an extraction cell(s) for contacting the critical fluid with the aqueous effluent.    DESCRIPTION OF DRAWING(S) - The figure is a schematic representation of the groundwater remediation and effluent treatment system.    Groundwater remediation system (20)    Process chemical feed (22)    Process water feed (24)    Injection system (26)    Critical fluid extraction treatment facility (40)