Document ID: EPA-HQ-OAR-2007-0877-0055
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2008-06-16T04:00Z

"Tony Nutter" <TNutter@harrisongypsum.com> 
06/11/2008 11:28 AM	To
Keith Barnett/RTP/USEPA/US@EPA
cc

bcc

Subject
RE: Cost of Gypsum used in Cement Manufactures
	
		
		
		Keith,
Your assumptions are correct, that should be close to the basic cost per
ton delivered to the plant depending on distance. Do you have a
particular cement plant in mind, I know several plants have wet
scrubbers and produce synthetic gypsum which is used in the cement
grinding process.

-----Original Message-----
From: Barnett.Keith@epamail.epa.gov
[mailto:Barnett.Keith@epamail.epa.gov] 
Sent: Wednesday, June 11, 2008 10:21 AM
To: Tony Nutter
Subject: Cost of Gypsum used in Cement Manufactures

Dear Mr. Nutter:

This email is a follow -up to a conversation we had around May 28.  As I
mentioned on the phone, I am working on an EPA project to review certain
air emissions standards for portland cement kilns.  One issue we are
addressing is the use of synthetic gypsum produced by an sulfur dioxide
wet scrubber at a cement facility  to replace mined gypsum.

I was asking about the cost of gypsum that might be purchased by cement
plants in your market area (specifically Texas) to mix with clinker.  In
our conversation you indicated that the cost of gypsum at the mine was
$10.00 per ton.  The main cost to a cement plant would be the freight to
get the gypsum to the plant.  You estimated that freight costs would
vary from $1500 to $2500 for a 100 ton rail car.   By my calculation
that would mean a freight cost of $15 to $25 per ton.  Therefore the
total delivered cost of gypsum to a cement plant in Texas would range
from $25 to $35 per ton.

Could you please confirm my understanding is correct?

Attached is the MSDS for the material we discussed from your website.

(See attached file: MaterialSafetyDataSheet.pdf)

Keith W. Barnett
USEPA/OAQPS/SPPD/MMG
Mail Code D243-02
Research Triangle Park, NC  27711
919-541-5605
barnett.keith@epa.gov