1

BECKHAM, LISA

From: Gray, Sterling <sterling.gray@urs.com>

Sent: Monday, June 02, 2014 3:30 PM

To: BECKHAM, LISA

Subject: RE: APS Four Corners

Yes – that’s correct. 

Sterling M. Gray, PE | Business Development Manager 

URS Corporation | Process Technologies 

9400 Amberglen Blvd | Austin, TX 78729 

T. 512-419-5653 |C. 512-633-4975 | E. sterling.gray@urs.com

www.urs-processtechnologies.com

Partnering for Pinnacle Performance 

From: BECKHAM, LISA [mailto:BECKHAM.LISA@EPA.GOV] 

Sent: Monday, June 02, 2014 4:54 PM 

To: Gray, Sterling 

Subject: RE: APS Four Corners 

Sterling- I just noticed I missed read your previous email. I was thinking it said 1.5 ppm instead of 0.0015 

lb/MMBtu. I just want to confirm that number, which would be about 517 ppb (0.517 ppm). 

Lisa 

From: Gray, Sterling <sterling.gray@urs.com> 

Sent: Friday, March 28, 2014 11:27 AM 

To: BECKHAM, LISA 

Subject: RE: APS Four Corners 

 

Thank You. By the way – did you used to work for KY DAQ? I think I may have given a presentation at your offices in 

Frankfort in mid-2000’s.

You can find additional information about our SO3 control technology at:

http://urs-processtechnologies.com/services/air-pollution-control/so3-control-technologies/

For applications similar to Four Corners (fuel and plant configuration), we have offered guarantee for SAM emissions of 

no more than 0.0015 lb/MMBtu.

Kind regards, Sterling

Sterling M. Gray, PE | Business Development Manager

URS Corporation | Process Technologies 

9400 Amberglen Blvd | Austin, TX 78729

T. 512-419-5653 |C. 512-633-4975 | E. sterling.gray@urs.com

www.urs-processtechnologies.com

Partnering for Pinnacle Performance
2

From: BECKHAM, LISA [mailto:BECKHAM.LISA@EPA.GOV] 

Sent: Friday, March 28, 2014 1:12 PM 

To: Gray, Sterling 

Subject: RE: APS Four Corners

 

It is still very much under review.

From: Gray, Sterling [mailto:sterling.gray@urs.com] 

Sent: Friday, March 28, 2014 11:12 AM 

To: BECKHAM, LISA 

Subject: RE: APS Four Corners

 

Lisa – Thank you for the information. Has the H2SO4 permit limit been set yet – or is it still in review?

Sterling

Sterling M. Gray, PE | Business Development Manager

URS Corporation | Process Technologies 

9400 Amberglen Blvd | Austin, TX 78729

T. 512-419-5653 |C. 512-633-4975 | E. sterling.gray@urs.com

www.urs-processtechnologies.com

Partnering for Pinnacle Performance

From: BECKHAM, LISA [mailto:BECKHAM.LISA@EPA.GOV] 

Sent: Friday, March 28, 2014 12:21 PM 

To: Gray, Sterling 

Subject: RE: APS Four Corners

 

Hi SterlingThe PSD permit will have an H2SO4 limit. Most other BACT limits have been set on a lb/MMBtu basis, but EPA has set a 

ppm-based limit in at least one consent decree. 

Lisa Beckham

Environmental Engineer

Air Permits Office

EPA Region 9

(415) 972-3811

From: Lee, Anita 

Sent: Friday, March 28, 2014 10:13 AM 

To: Gray, Sterling 

Cc: BECKHAM, LISA 

Subject: RE: APS Four Corners

 

Hi Sterling,

I am not working on the permitting side of the SCR installation on Four Corners Units 4 and 5. I’ve cc’ed Lisa Beckham 

from the Air Permits Office in Region 9, who is the lead on this permit application.

Thanks!
3

Anita

Anita Lee, PhD

Environmental Scientist

US EPA, Air Division, Planning Office (Air-2)

75 Hawthorne Street

San Francisco, CA 94105

(415) 972-3958

From: Gray, Sterling [mailto:sterling.gray@urs.com] 

Sent: Friday, March 28, 2014 9:44 AM 

To: Lee, Anita 

Subject: APS Four Corners

 

Hi Anita: 

 

I understand that Arizona Public Service Company will be moving forward with an SCR installation at their Four Corners 

plant on Units 4/5 for NOx control. 

 

Are you involved in the permitting for this project? 

 

Will they have a sulfuric acid mist emissions limit for the project? 

 

They have inquired about our SBS Injection technology and how low we can reduce the emissions. 

 

Curious, Sterling 

 

Sterling M. Gray, PE | Business Development Manager 

URS Corporation | Process Technologies 

9400 Amberglen Blvd | Austin, TX 78729

T. 512-419-5653 |C. 512-633-4975 | E. sterling.gray@urs.com

www.urs-processtechnologies.com

Partnering for Pinnacle Performance

 

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