Chlorinated Solvent Source Control on a Limited Budget

摘要

Past operations of the former Spin 'N Span Cleaners and Laundry facility located in downtown Memphis, Tennessee, appear to be the source of perchloroethene (PCE) and daughter products found in the site soil and groundwater. As a result of a site investigation, it was estimated that there are 7.9 kg of PCE and 0.04 kg of TCE in the subsurface. A Remedial Alternatives Study in September 2003 indicated that anaerobic bioremediation would the most cost effective treatment technology for this site. Based on the SRS? application design model, 12,500 pounds of Slow Release Substrate (SRS~(TM)) were injected at 60 locations in November, 2005 and February, 2006. Based on the diminishing chlorinated compounds and sulfate concentrations, the injection of SRS~(TM) substrate enhanced in-situ bioremediation at this site. PCE concentrations in groundwater within the source area injected with SRS~(TM) decreased by 96% and 99% within the first eleven months.