Re: Avenal Class I Impact Analysis 

Dee_Morse to: Eric Walther 11/21/2007 09:41 AM 

Cc: Carol Bohnenkamp, federalpower, "Gary Rubenstein", mmccorison, 

"Gilliland, Steve", "Tracey Gilliland", tprocter, John_Bunyak 

History: This message has been forwarded. 

Eric, 

We reviewed the information you provided regarding the Avenal Energy 

Project in Avenal, California. Given the relatively low emission 

increases (144 TPY of NOx, 81 TPY of PM10 and 16 TPY of SOx) and the 

distance to two National Park Service Class I Air Quality Areas (113 km 

southeast of Pinnacles NM and 113 km west of Sequoia NP), we do not 

anticipate the emissions from the Avenal Project will significantly 

impact either National Park Service Class I area. However, I do want to 

inform you that the statement on page 11 of the Air Dispersion Modeling 

and Health Risk Assessment Protocol - Avenal Energy Project "The 

project is not located within 100 km of Class I areas, therefore the 

project although a major source will not need to evaluate impacts to 

visibility and other air quality related values at Class I areas." is 

incorrect. The Federal Land Managers of Class I areas are concerned 

about proposed facilities beyond 100 km if the emission increases are 

significantly large, and may request a full air quality analysis for 

these proposed facilities on a cases by case basis. Therefore, there is 

no automatic 100 km cutoff for Class I area impact analyses. 

Thanks, 

Dee Morse 

Environmental Protection Specialist 

Air Resources Division 

Natural Resource Program Center 

National Park Service 

Phone: 303 969-2817 

Fax: 303 969-2822 

e-mail: dee_morse@nps.gov 

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1 1 "Eric Walther" 1 

1 1 <EWalther@sierrarel 

1 1 search. com> 1 

1 I 1 

1 1 11/13/2007 04:48 1 

1 I PM PST 1 

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1 To: <Dee Morse@nps.gov>, <tprocter@fs.fed.us>, 

<mmccorison@fs.fed.us> - I 

1 cc: "Gilliland, Steve" <steve.gilliland@synenco.com>, 
<federalpower@houston.rr.com>. "Tracey Gilliland" 

I <tegilliland@gmail.com>, "Gary Rubenstein" 

<GRubenstein@sierraresearch.com>, "Eric Walther" 

I <EWalther@sierraresearch.com> 

Subject: FW: Avenal Class I Impact Analysis 

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Dee, Trent and Mike: 

At the request of Carol Bohnenkamp, and confirmed in a call with Dee today, 

I am providing you the following maximum annual emissions from the proposed 

Avenal Energy Project, for which project Carol has already forwarded to you 

the Air Dispersion Modeling and Health Risk Assessment Protocol: 

NOx: 144.3 tpy 

SOx: 16.3 tpy 

PMIO: 80.7 tpy 

As stated in the protocol, the closest distance from the Avenal Energy 

Project site to a Class I area, Pinnacles National Monument, is 

approximately 113 km. 

We appreciate your review of the protocol. Hopefully, your review of the 

emissions and distance will support our determination in the protocol that 

a Class I area impact analysis will not be required for this project. 

Eric 

Eric Walther 

Sierra Research 

1801 J Street 

Sacramento, CA 95811-3009 

916-444-6666 Main x121 

916-444-8373 Fax 

916-833-8774 Cell 

ewalther@sierraresearch.com