Document ID: EPA-HQ-OAR-2007-0877-0103
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2010-09-09T04:00Z

Comments on Portland Cement NSPS
	Keith Barnett 
	to:
	jportocarrero
	07/30/2009 02:32 PM
	Show Details

Dear Mr. Portocarrero:

I have written up a short note of our conversation a few days ago.  Could 
you review what I wrote and add any corrections?  For the list of kilns 
that Humboldt build I added the year based on the PCA plant directory. 
Please note if the dates are correct.

Also, I have two additional questions?

1.  Can you explain the difference between a sulfur bypass and an alkali 
bypass?

2.  Can you think of any other possible kilns that have the 100 percent 
bypass of kiln gases in the Humboldt comment letter.  I spoke with the 
Santa Cruz plant you mentioned and indicated they didn't have 100 percent 
bypass, so I am wondering if you can provide any additional examples.

Thanks for your help.

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