Document ID: EPA-HQ-OPPT-2005-0049-0896
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2008-04-17T04:00Z

-----Original Message----- 

From: Delpire.Lynn@epamail.epa.gov [  HYPERLINK
"mailto:Delpire.Lynn@epamail.epa.gov" 
mailto:Delpire.Lynn@epamail.epa.gov ] 

Sent: Wednesday, July 25, 2007 6:10 PM 

To: Lee, Rodney (Mark) 

Cc: Flessner.Conrad@epamail.epa.gov; Silagi.William@epamail.epa.gov 

Subject: Fw: Carpet Percentages from HUD 

Hi, Mark.  Here are Matt LaPenta's new carpet percentages, as we
discussed. 

Thanks, 

Lynn 

----- Forwarded by Lynn Delpire/DC/USEPA/US on 07/25/2007 06:08 PM -----

             William 

             Silagi/DC/USEPA/ 

            
US                                   
                   To 

                                    
  Lynn Delpire/DC/USEPA/US@EPA 

             07/24/2007
05:06                                 
       cc 

             PM 

                                    
                            Subject 

                                    
  Carpet Percentages from HUD 

----- Forwarded by William Silagi/DC/USEPA/US on 07/24/2007 05:05 PM 

----- 

             Matthew LaPenta 

             <Matthew_LaPenta 

            
@abtassoc.com>                             
             To 

                                    
  William Silagi/DC/USEPA/US@EPA 

             07/24/2007
03:34                                 
       cc 

             PM                      
Penny Schafer 

                                    
  <Penny_Schafer@abtassoc.com> 

                                    
                            Subject 

                                    
  Carpet Percentages 

Bill, 

The attached spreadsheet shows the proposed carpet percentages.  The
arithmetic means for percent of floors covered with carpets are 51.5%
for target housing and 54.7% for public/commercial buildings.

I did not estimate the percentages for carpeting the same way that it
was done for the 2006 residential analysis because I think those
calculations were unnecessarily complicated and may underestimate the
amount of carpet.

The attached spreadsheet describes the calculations in more detail, but
in short I calculated the target housing numbers as follows:

      (1)   For each room we know whether there is wall-to-wall 

carpeting, 

an area rug, a mat, or no carpet.  In each room I assumed (a) 100%
carpeting for wall-to-wall, (b) 50% carpeting for area rugs, and (c) 0%
carpeting otherwise.

      (2)   Each room in the sample was weighted by it's
population 

weight 

(this does not account for square footage, which was not available for
rooms). 

The public and commercial buildings are done the same way, but they are
done at the classroom level, so building-wide percentages were not
calculated.  Because each classroom would be assigned a 0%, 50% or
100%, ICF might prefer to use the estimated custom distribution where
35% had wall-to-wall, 25% had no carpet, and 40% had area rugs.

Penny mentioned that you were questioning my "50% assumption."  After
thinking about it a bit more I am actually pretty comfortable about it..

Based on a quick web search it seems that 8x10 is one of the more
popular rug sizes, which would be about 53% of a 150 sqft room.  9x13
and 5x7 and

4x6 are other common sizes.  Also, one website suggested leaving 18" to
36" 

between the edge of the rug and the walls.  This doesn't sound like a
lot, but actually 50% of a 150 square foot room being covered is
consistent with this.

Let me know what you think. 

-Matt 

============================================= 

Matt LaPenta 

Senior Analyst, Abt Associates Inc. 

Matthew_LaPenta@abtassoc.com 

ph: (617) 349-2788  ||  fx: (617) 349-2660 

55 Wheeler Street, Cambridge, MA 02138 

  HYPERLINK "http://www.abtassociates.com/environment" 
http://www.abtassociates.com/environment  

(See attached file: CarpetPercentages.xls) 

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Thank you.(See attached file: CarpetPercentages.xls)