1. Select Scenario and Media.
Select one of the land use scenarios under the "Select Scenario" list.
Select one or more media to assess under the "Select Media" list.
2. Select Chemicals Data Source.
There are two choices here: "Database hierarchy defaults" and "User-provided".
If you select "Database hierarchy defaults," calculations will be done using our default toxicity values and chemical-specific parameters.
If you select "User-provided", you will be able to edit the default toxicity values and chemical-specific parameters after clicking "Retrieve (new tab)" at the bottom of the form.
3. Select RfD/RfC Type.
Select Chronic or Subchronic for RfD/RfC Type.
Chronic selection will retrieve Chronic-only RfDs/RfCs; Subchronic selection will first retrieve subchronic values where possible and then use chronic values.
4. Select Chemicals of Interest.
Select individual Chemicals of Interest by first clicking in the box, then either scroll through the list or type the chemical name/CAS. Click on the highlighted name to add it to the list. To add a chemical that is not in the list, type the name of the chemical and click the add button.
Select an entire category of chemicals by clicking one or more options in the "Or Select by Category" list.
5. Display Risk/HI Output in Percentage.
To facilitate finding chemicals driving the risk, there is an option to Display Risk/HI Output in Percentage. If selected, results based on percentage will be in a table after the results based on risk/HI. See full user guide for more information.
6. Click "Retrieve (new tab)."
After clicking "Retrieve (new tab)" the next page will allow you to enter your media concentrations and edit any default exposure parameters.
If "User-provided" was selected in step 2, you will be able to edit default toxicity values and chemical-specific parameters.
At the bottom of this page, click "Retrieve (new tab)" to get the results.
Pressing "Clear" on the bottom of this page will reset all parameters to default values.
Review and Export Results.
At the top of the final page there are options to "Output to XLS" and "Output to PDF".
Input parameters and Risk/HI results for each media selected are presented.
|