There may be situations where the decision criteria generated from SADA through human health or ecological
risk modeling may be insufficient for a particular application or simply irrelevant. You can import your own
decision criteria into SADA and use it exactly like it was created by SADA. This is called a custom analysis.
SADA provides an import wizard that captures your decision criteria file (Access or .csv) compares it to the
contaminants in your file and with your confirmation matches the two sets together.
You then have the abiltiy to view your
criteria, screen against it, create ratio (risk) maps, and apply it to a number of decision criteria models including
area of concern, cost/benefit analysis, and secondary sampling designs (see below).
Custom criteria can now contribute to the characterization in a spatial context.
Users can subdivide the site using polygon tools
and perform assessments in each subregion. Users can also connect the criterae directly to a geospatial tool
such as estimation and uncertainty mapping
and the subsequent decision analysis maps. The following images show the
spatial distribution of risk, the probabilty of exceeding a PRG, and a decision map based on a risk criteria.
Spatial Screens (boxes indicate points of exceedance)
Point Ratio Maps
Sum of Fractions
Probability of Exceeding Criteria
Custom Criteria Based Decision Map (gray area is area of concern)
Supporting Sampling Designs
To see how custom criteria are used in the development of sampling designs see sample designs.