Aziz, CE; Smith, AP; Newell, CJ; Gonzales, J
The Technology Transfer Division of the Air Force Center for Environmental Excellence has developed the BIOCHLOR data base project in which key characteristics of individual chlorinated solvent and daughter product plumes were identified, and the effect of hydrogeologic and environmental factors on the plume lengths were investigated. The data were also used to calibrate the BIOCHLOR model to generate field-scale biodegradation rate constants. The data base was compiled using data from site investigation, treatability, and natural-attenuation reports. The BIOCHLOR model simulates the reactive transport of chlorinated solvents in the subsurface, assuming sequential first-order reductive dechlorination and accounting for daughter product formation and degradation, yielding a biodegradation rate constant. The data contained in the data base are summarized, showing that the trichloroethylene, cis-1,2-dichloroethene, and vinyl chloride medium plume lengths were 1215, 1205, and 860 ft, respectively, and were impacted by source area characteristics and advection. The reductive dechlorination rate constants for tetrachloroethylene, trichloroethylene, cis-1,2-dichloroethene, and vinyl chloride were calculated at 1.1, 1.2, 1.2, and 1.7/yr, respectively.