Groundwater remediation at contaminated fractured rock sites historically has been considered extremely challenging and impracticable or even impossible within reasonable timeframes in many cases. Limiting factors to remediating fractured rock sites have included the physical and chemical properties of the contaminant; physical, chemical and biological controls on migration and transformation; heterogeneity; low transmissivity; presence of DNAPLs; and presence of large plumes. However, recent advancements in understanding fate and transport processes, modeling, remediation technologies, and development of alternative endpoints have resulted in successes, suggesting that the outlook for remediation of fractured rock sites is improving. Engineers, hydrogeologists, geochemists, and microbiologists conducting theoretical, laboratory, and field investigations applicable to the remediation of fractured rock sites will describe emerging and standard remediation technologies, case studies, and modeling studies.