6-25-2012

            Description of spreadsheet files used for cost analysis
There are 5 total Excel spreadsheet files sorted into two groups.  
The first group contains the primary and sensitivity analysis files.
   * pm_naaqs v0.8.7_analysis_main.xlsx:  Includes the primary analyses for each of the alternate standards (see Chapter 7).
   * pm_naaqs v0.8.8_sensitivity full.xlsx:  Includes the sensitivity analyses for each of the alternate standards (see Appendix 7A).
The second group contains three input data files including known control measures and air quality ratios used in the cost analyses. 
   * pm_8.7 data0.xlsx:  Group 1 control measures and air quality ratio inputs.
   * pm_8.7 data1.xlsx:  Group 2 control measures.
   * pm_8.7 data2.xlsx:  Group 3 control measures.

