Concentration models calculation

There are a number of concentration model types are available. A basic distinction is between using the empirical concentration data (empirical model), fitting a statistical model to the concentration data (parametric model), or to construct a model from (conservative) limit values. Settings relevant for some of these model types as well as other settings are described under concentration model settings.

• Concentration model types
  • Empirical model
  • Non-detect spike lognormal model
  • Non-Detect-Spike Truncated lognormal model
  • Censored Lognormal model
  • Zero-spike censored lognormal model
  • Non-detect spike MRL model
  • Summary statistics model
• Imputation
  • No imputation
  • Impute all nondetects
  • Impute nondetects based on authorized uses
  • No imputation except for authorized uses
• Concentration models
  • Mixture zero spike and censored lognormal
  • Censored lognormal
  • Mixture non-detect spike and truncated lognormal
  • Mixture non-detect spike and lognormal