### Re:DataRequest Greg.Gannon to:VanessaHinkle 06/30/201103:38PM Cc: Meg.Garakani,Hector.Ybanez From: Greg.Gannon@Holcim.com To: VanessaHinkle/R8/USEPAlUS@EPA Cc: Meg.Garakani@holcim.com,Hector.Ybanez@holcim.com History: Thismessagehasbeenrepliedtoandforwarded. 1attachment NOx-S02-Data-Request-to-EPA.pdf

Hi Vanessa As requested the NOx and S02 results for the previous 3 years is attached. (See attached file: NOx-S02-Data-Request-to-EPA.pdf) Also, doyou have a proposed agenda or discussionpoints that you could share withus for the conference call scheduled for 2 PM (MST) next Tuesday (07/06/11)? Thanks,
Greg Gannon Environmental Manager Holcim

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From: Hinkle.Vanessa@epamail.epa.gov To: Greg.Gannon@Holcim.com Date: 06/16/2011 04:02 PM Subject: Re: Data Request
Greg, I understand. Wheneveryou can get to it will be ok. Vanessa Hinkle Environmental Scientist EPA Region 8 1595 Wynkoop Denver, CO 80202-1129(303) 312-6561

From: Greg.Gannon@Holcim.com To: Vanessa Hinkle/R8/USEPA/US@EPA Date: 06/16/2011 03:59 PM Subject: Re: Data Request

Hi Vanessa I have not had any time to dedicate in gathering the data request this week. When considering "typical" emissions there becomes a large range of variability in emission data and to compile the data that will be helpful inyour consideration is going to take more time than originally contemplated. Is there a chance that I couldprovide the data for your request late next week or preferably the week following? Thanks,
Greg Gannon Environmental Manager Holcim

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From: Hinkle.Vanessa@epamail.epa.gov To: Greg.Gannon@Holcim.com Cc: Lisa.Olsen@holcim.com Date: 06/13/2011 04:28 PM Subject: Re: Data Request
Greg, Yes,we would like the last 3 years (36 months) of NOx and S02 data in the format of the example that you sent. Also, if there is any information that would help explain any operational issues at the time (such as not operating or at reducedproduction), that would be helpful. I'mjust trying to get a better idea of "typical" emissions. So, anything you are comfortable providing would be great. Thanks. Vanessa Hinkle Environmental ScientistEPA Region 8 1595 Wynkoop Denver, CO 80202-1129 (303) 312-6561

From: Greg.Gannon@Holcim.com To: Vanessa Hinkle/R8/USEPA/US@EPA Cc: Lisa.Olsen@holcim.com Date: 06/13/2011 02:46 PM Subject: Data Request

Hi Vanessa Per our telephone conversation this morning I would like to get written documentation from your office of what be certain that we areperfectly clear on is being requested. this request. We want to

As I understand you would like to get thepast three years of data for NOx and S02, basically in a format such as: (Embedded image moved to file: pic05809.gif) Please let me know if this is acceptable. (36 months)

Thanks,
Greg Gannon Environmental Manager Holcim

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### Analysisof2008,2009and2010CEMDATA NOxEmission

### (Ib/hr) S02Emission

### (Ib/hr) Hourly Daily 30-dayRA Hourly Daily 30-dayRA 2008 Mean 354.1 361.2 359.3 7.1 6.5 6.6 StDEV 117.4 93.3 50.7 17.4 8.9 

### 2.3

99th 657.8 596.8 454.4 57.9 29.8 12.5 max 772.8 664.8 464.0 607.9 134.7 12.5 2009 Mean 310.4 308.3 302.3 4.8 4.8 5.2 StDEV 131.6 116.8 108.0 9.7 7.4 4.3

99th 607.7 527.8 453.2 54.1 34.0 18.5 max 770.3 634.1 455.0 155.4 83.5 18.7 2010 Mean 348.7 348.5 349.5 5.5 5.4 5.6 StDEV 94.5 66.0 24.8 6.3 3.3 1.6

99th 674.8 602.8 403.8 26.6 15.4 8.9 max 918.4 643.5 407.2 225.2 24.4 9.1 Overall Mean 338.3 340.8 337.9 5.8 5.6 5.8 StDEV 116.6 96.4 73.5 12.1 7.1 3.0

99th 650.5 594.8 452.5 45.5 25.5 17.5 max 918.4 664.8 464.0 607.9 134.7 18.7