From: "Alicea, Jezebele" <Alicea.Jezebele@epa.gov>

To: "Messinger, Lisa C." <LMessinger@Vectren.com>

CC: "Covington, James" <Covington.James@epa.gov>, "Jordan, Ronald" <Jordan.Ronald@epa.gov>

Date: 7/24/2013 11:29 AM Subject: RE: Information Request

Greetings Ms. Messinger!

EPA received your request for "all information related to A. B. Brown Generating Station and F. B. Culley Generation Station, facilities owned by Southern Indiana Gas and Electric Company, including information that EPA has derive d from information obtained from these facilities and from all other sources, and including facility

- specific or facility

- derived information in input files to" certain documents found on the docket for the Steam Electric ELG rulemaking.

EPA has made avai lable substantial data and other information relating to the proposed rule in the docket for the steam electric power generat ing effluent guidelines rulemaking, including data relating to the specific facility(ies) you identified, data about other plants w here that data is not claimed as confidential business information or could lead to the disclosure of confidential business information, equations used to estimate several key outputs such as costs, and a description of the various methodologies used by EP A (e.g., costing methodologies, pollutant loadings methodologies, etc.). In addition to this publicly available data, in response to your request, EPA is planning to forward u nder separate correspondence additional data that provides plant

- specific compli ance costs and pollutant removals that EPA estimated would be attributable to the proposed rule, as well as plant

- specific input values that were used in EPA's cost models, pollutant loadings/removal models, and environmental assessment models. EPA is plan ning to provide a description of how each plant can use available data to make relevant calculations, such as how to calculate pollutant loadings. EPA believes these data, in addition to the publicly available da ta already provided in the docket, provide you with sufficient information to understand any effects the proposed rule may have on your facilities and to comment effectively on the proposed rule, and this data represents the extent of information that EPA can make available to you witho ut disclosin g, directly or indirectly, information claimed as confidential business information by other sources.

To ensure that confidential business information is only released to an authorized official, EPA requires that you submit you r request on company
letterh ead using the certification statement below. The certifying official must be a responsible corporate official or his/her aut horized representative.

Certification Statement

"I certify under penalty of law that I am a responsible corporate official or his /her authorized representative of [fill in name of corporate entity] and am authorized to request confidential business information on behalf of my company. I certify that [fill in name of corp orate entity] is the majority owner or the operator for each f acility (and for each unit at each facility) for which we are requesting confidential business information. I am aware that there may be significant penalties for submitting false information including the possibility of fines and im prisonment, pursuant

to 18 U.S.C. § 1001. "

In addition, you must provide the name (if not the certifying official) and mailing address (no P.O. boxes) for receipt of th e requested information. Mailing addresses must be accessible to a commercial courier service (e.g., Federal Express).

Have a blessed day! Sincerely,

[MC900437627[1]][MC900437627[1]][MC900437627[1]][MC900437627[1]][MC900437627[1]]

Jezebele Alicea

- Virella Environmental Engineer

Phone No: 202

- 566

- 1755

Fax No: 202

- 566

- 1053

EPA

- Office of Water/OST/EAD

Mail Code: 4303T 1200 Pennsylvania Avenue, N.W. Washington, D.C. 20460 [MC900437627[1]][MC900437627[1]][MC900437627[1]][MC900437627[1]][MC900437627[1]] From: Messinger, Lisa C. [mailto:LMessinger@Vectren.com] Sent: Tuesday, June 18, 2013 3:54 PM

To: Alicea , Jezebele; Covington, James Subject: Information Request

Attached please find a request for information used in the ELG rulemaking, provided by and pertaining to the SIGECO (dba Vect ren Power Supply) A. B. Brown Generating Station and F. CB. Culley Gener ating Station, both located in Indiana.

Thank

- you, Lisa C. Messinger, CHMM Manager, Utility Environmental Compliance Vectren Corporation

812

- 491

- 4666

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