Brian.Gasiorowski@lafarge-na.com 

10/06/2006 02:10 PM	To

Keith Barnett/RTP/USEPA/US@EPA

cc

bcc

Subject

Re: Costs of replacing fly ash with shale

	

Keith - the assumptions you are using appear to be reasonable.

Brian Gasiorowski

Regional Environmental Manager

Lafarge North America Inc.

30600 Telegraph Road, Suite 4000

Bingham Farms, MI 48025-4530

248-593-2709 (office)

248-705-8201 (cell)

248-594-7301 (fax)

                                                                        
  

                                                              

                             

Barnett.Keith@epam                                                      
  

                                 

                             ail.epa.gov         To:   

brian.gasiorowski@lafarge-na.com                                        
  

       

                                                 

cc:                                                                     
  

             

                             10/06/2006 01:30    Subject:  Costs of 

replacing fly ash with shale                                         

                             

PM                                                                      
  

                                 

                                                                        
  

                                                              

                                                                        
  

                                                              

Dear Brian:

Based on our conversation I have changed our assumptions for the costs

for replacing the fly ash with shale as follows:

1.  Fly ash case

Fly ash mercury content - 0.5 ppm.

Cost of fly ash - We plan to use approximately $15.00 per ton.  We are

aware that this value may vary significantly for different facilities,

but we  think that $15.00 per ton is a reasonable estimate.

2.  No fly ash case

Shale mercury content - 0.022 ppm (based on average shale analysis from

PCA report). This is a more conservative figure for the purposes of our

analysis than the Paxton Shale, which I recall was about 0.3 ppm.

Shale cost - $50.00 per ton delivered.  Again,  we realize this may vary

widely.

The replacement ration of shale to fly ash is 1/1.

Please let me know if these values are reasonable based on your

experience.

Keith W. Barnett

USEPA/OAQPS/SPPD/MMG

Mail Code D243-02

Research Triangle Park, NC  27711

919-541-5605

barnett.keith@epa.gov

