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EPA On-line Tools for Site Assessment Calculation

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Formulas

OnSite includes formulas for calculating parameter values needed for models.

The formulas are divided into three categories, Site Data Preparation, Model Input Parameters, and Flow and Transport Phenomena.

• Formulas
• • Site Data Preparation
  • • Hydraulic Gradient
    • Hydraulic Gradient--Scaled from a Map
    • Three Point Hydraulic Gradient
    • Moisture Content
  • Model Input Parameters
  • • Retardation Factor
    • Henry's Law Coefficientsas a function of temperature.
    • Estimated Longitudinal Dispersivity
  • Flow and Transport Phenomena
  • • Darcy's Law
    • Seepage Velocity and Travel Time
    • Effective Solubilities from Fuels
    • Mass Distribution in Multiphase Systems

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