| This report brings together the most current (2000) science of chromium contamination and the in situ treatment and control of sites with groundwater and/or soil contaminated with chromium. A number of available in situ technologies or treatment approaches use chemical reduction and fixation for chromium remediation. These include geochemical fixation, permeable reactive barriers (PRBs), and reactive zones. Other types of in situ treatment that are under development include enhanced extraction, electrokinetics, biological processes that can be used within PRBs and reactive zones, natural attenuation, and phytoremediation. Detailed discussions of these in situ technologies are contained in the report. |