Options | Transform Data

Use this dialog to transformation data and to specify how non-detects are represented in the project.

 

Transformation:

Select a transformation from the list. Available transformations include:

  • Original Data (Not Transformed)
  • Natural Logarithm
  • Log Base 10
  • Square Root
  • Cube Root

 

Non-Detects:

This specifies how non-detect values are represented in the project.

image\BLUEBUTT.gif Detection limit -- Non-detects are left unchanged.

image\BLUEBUTT.gif ½ Detection Limit -- Non-detect values are replaced with ½ the detection limit.

image\BLUEBUTT.gif 1 part-per-billion -- Non-detect values are replaced with a value of 1 for all analyses.

image\BLUEBUTT.gif Zero -- Non-detect values are replaced with a value of 0 for all analyses.

image\BLUEBUTT.gif Cohen's Adjustment -- Apply Cohen's Adjustment as recommended in USEPA 1989 guidance document.

image\BLUEBUTT.gif Aitchison's Adjustment -- Apply Aitchison's Adjustment as recommended in USEPA 1992 guidance document.