SIS Note: Steps to change PM2.5 standard from 65 to 25 micrograms.
November 2009: 

This note lists steps to change the SIS model default value of the PM2.5 standaard from 65 micrograms per cu meter to 35.

1. Open the SISmodel_2.xls and enable macros.
2. Press the "Ctrl"-"Shift" and "3" keys all at the same time. (This is a ctrl-#).
	A Window should appear:
	"SIS: Yes to show all sheets
		No to cancel"

3. Select Yes.  This shows all of the SIS  spreadsheets.
Find and select the "Lookups" tab.

4. Go to row 116.  There is a yellow highlight box in cells C116-D117.

	For Concentration Chart	
	0	65
	50	65

Change the values in Column D from 65 to 35.

5. Press the "Ctrl"-"Shift"-"3" keys at the same time again.
  	"SIS: Yes to hide sheets
		No to reset
		Cancel to cancel"

Select Yes to hide.

6. Save the workbook.