Set Ecological Statistics

SADA Version 3 allows the user to select the statistical approach for calculating screening values and exposure concentrations.

From the **Ecological** menu, select **Configure Ecological Risk** and then **Set Screening Statistics **or **Set Exposure Statistics**.

SADA opens one of the following windows.

Select the desired statistical approach and press the **OK** button. The different approaches are defined as follows:

• Maximum Value – the maximum concentration, detected or nondetected, for normal or lognormal distribution

• Maximum Detected Value – the maximum detected concentration for normal or lognormal distribution

• UCL95 – the 95% upper confidence limit on the mean for normal or lognormal distribution

• Mean – the average concentration over all values for normal or lognormal distribution

*Note: For screening calculations, the maximum detected value is the default option while for exposure calculations, the lesser of the maximum detected value and the UCL95 is the default option.*