Bob Gunn <bgunn@natcem.com> 
03/12/2009 04:35 PM	To
	Keith Barnett/RTP/USEPA/US@EPA
	cc
	"HolmesAems@aol.com" <HolmesAems@aol.com>
	bcc
	
	Subject
	THC Mill On/Mill Off Vairibility
	
	
	History:	
		This message has been replied to.

Dear Keith,

Per our past discussions, we have found that significant variation exists 
in THC test results related to the operation of the inline mill.    We 
attribute this 35% variation to organics being released from the limestone 
while it is crushed, dried and preheated.  Accordingly, those THCs are not 
coming from the kiln and we believe that this variation must be addressed 
in the EPA notice.  Here are the results of a number of tests that show 
the effect we have seen during normal operations.  Let me know if you have 
any questions.


Bob Gunn
Manager of Environmental Affairs
National Cement Company of Alabama
205-472-2191 ext 4472
