Data Selection

LeachXS Screen Shot

LeachXS™ is a database/expert decision support system for characterization and environmental impact assessment based on estimated contaminant release as derived from leaching tests. Databases used by LeachXS™ include leaching for 600+ materials, scenarios, and regulations to allow comparisons of test data versus specific utilization or disposal conditions. The expert decision system assists in evaluation and laboratory guidance, data management and evaluation, source term description, impact evaluation, and decision analysis. Applicable materials for assessment using LeachXS™ include:

  • Treated Wastes
  • Stabilized Waste
  • Construction
  • Materials
  • Cement Mortars and Concrete
  • Soils and Contaminated Soil
  • Sludge
  • Compost
  • Sediments
  • Municipal Wastes
  • Industrial and Hazardous Wastes
  • Mining Wastes
  • Preserved Wood


ORCHESTRA (Objects Representing CHEmical Speciation and TRAnsport models) is a computer program for modeling (geo)chemical speciation and mass transport processes.

ORCHESTRA is a modeling framework for defining state-of-the-art geochemical equilibrium models and combining these models with mass transport for user-defined processes. The ORCHESTRA chemical module can calculate chemical thermodynamic equilibrium in a similar way to well known speciation codes, but is internally organized very differently. Instead of defining all model equations within source code, equations are defined in a separate user accessible text file in ORCHESTRA.

ORCHESTRA has been used in practice for a wide range of applications that include aqueous speciation, precipitation, different forms of surface complexation, ion exchange, diffusion (including radial and electroneutral), convection, solid solutions, colloid adsorption, and biota uptake.

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