From: 	jeffrey.hummel@GM.COM 

To: 	Boyd.Rochelle@epamail.epa.gov 

Date: 	09/23/2010 07:06 AM 

Subject: 	Re: Stack Testing Reporting Spreadsheet Updated with THC tab



This spreadsheet has been significantly revised from the original.
 With one week left before the due date, why are you now asking for
detailed data breakdown of the front half and back half of the volatiles
and semi-volatiles?  

Jeffrey S. Hummel, MS, CHMM

Sr. Environmental Engineer

(812) 279-7271

(812) 279-7367 (Fax)

jeffrey.hummel@gm.com

General Motors LLC

105 GM Drive, Bedford, IN 47421

