### 1 Mon 3/2/2015 12:48 PM

Gregory Stella gms@alpinegeophysics.com

To: Langdon, Robin Langdon.Robin@epa.gov , Misenheimer, David

Misenheimer.David@epa.gov

Thank you.

On 3/2/2015 12:11 PM, Langdon, Robin wrote:

Hi Greg,

The files are now in the docket.

Robin

Robin Langdon

USEPA

Office of Air Quality Planning & Standards

Durham, NC 27711

919.541.5695

langdon.robin@epa.gov

From: Gregory Stella [ mailto:gms@alpinegeophysics.com ]

Sent: Monday, March 02, 2015 8:16 AM

To: Misenheimer, David

Cc: Weatherhead, Darryl; Langdon, Robin

Subject: Re: O3 RIA Baseline analysis files

David,

Just letting you know again that this f ile has yet to show up in the docket.

Greg

On 2/25/2015 3:41 PM, Gregory Stella wrote:

FYI - this file still hasn't shown up in the docket. Thanks again fo r providing it directly.

Greg

Fri 2/20/2015 9:19 AM

Gregory Stella gms@alpinegeophysics.com

To: Misenheimer, David Misenheimer.David@epa.gov

David,

Thank you. It is greatly appreciated!

### 2 Greg

On 2/20/2015 8:42 AM, Misenheimer, David wrote:

Greg

‐ Sorry for the delay in getting the files to show up in the docket website. Unfortunately,

we don't have any control over that process. The files are attached.

David Misenheimer

Environmental Engineer

Air Economics Group

Office of Air Quality Planning and Standards

U.S. Environmental Protection Agency

Room C441 E

Phone: (919) 541-5473

Fax: (919) 541-0839

E-mail: misenheimer.david@epa.gov

Mailing Address:

109 T.W. Alexander Dr.

Mail Code: C439-02

Research Triangle Park, NC 27711



### Wed 2/18/2015 9:17 AM

Gregory Stella gms@alpinegeophysics.com

To: Misenheimer, David Misenheimer.David@epa.gov

Thank you.

On Feb 18, 2015, at 8:26 AM, Misenheimer, David < Misenheimer.David@epa.gov > wrote:

Greg

‐ The files were submitted to the docket last Thursday, 2/12/2012.

David Misenheimer

Environmental Engineer

Air Economics Group

Office of Air Quality Planning and Standards

U.S. Environmental Protection Agency

Room C441 E

Phone: (919) 541

‐ 5473

Fax: (919) 541

‐ 0839

E

‐ mail: misenheimer.david@epa.gov

Mailing Address:

109 T.W. Alexander Dr.

Mail Code: C439

‐ 02

Research Triangle Park, NC 27711

### 3 From: Gregory Stella < gms@alpinegeophysics.com >

Sent: Tuesday, February 17, 2015 8:25 AM

To: Weatherhead, Darryl

Cc: Langdon, Robin; Misenheimer, David; Eyth, Alison; Zubrow, Alexis; Simon, Heather; Gamas, Julia;

Possiel, Norm

Subject: Re: Ozone NAAQS Sensitivity/Control Data Request



### Hi Darryl,

Can you confirm whether David has subm itted these files to the docket yet?

Thank you,

Greg

Thu 2/12/2015 2:10 PM

Gregory Stella <gms@alpinegeophysics.com>

To: Weatherhead, Darryl Weatherhead.Darryl@epa.gov

Thank you.

On 2/12/2015 2:04 PM, Weatherhead, Darryl wrote:

Hi Greg,

Thank you for your email. David is preparing those files now and will provide them to the docket.

Thanks,

Darryl

From: Gregory Stella [ mailto:gms@alpinegeophysics.com ]

Sent: Thursday, February 12, 2015 1:53 PM

To: Weatherhead, Darryl

Cc: Langdon, Robin; Misenheimer, David; Eyth, Alison; Zubrow, Alexis; Simon, Heather; Gamas, Julia;

Possiel, Norm

Subject: Re: Ozone NAAQS Sensitivity/Control Data Request



### Hi Darryl,

I am interested in obtaining the control files th at were used to generate the emission reduction

summaries presented in Tables 4A-5 and 4A-6 of the RIA. These data do not appear to be in the

docket and I was hoping you could make them availa ble to us. Please let me know if this is a

possibility.

Thank you,

Greg

### 4 Mon 2/2/2015 11:55 AM

Gregory Stella gms@alpinegeophysics.com

To: Weatherhead, Darryl <W eatherhead.Darryl@epa.gov>

Thank you.

On 2/2/2015 11:52 AM, Weatherhead, Darryl wrote:

Greg,

The file with subregion

‐ level emissions reduction estimates from the "unknown" controls was posted to

the docket this morning.

Darryl

Darryl A. Weatherhead, Group Leader

Air Economics Group, HEID/OAQPS

U.S. EPA Office of Air and Radiation

MD C439

‐ 02, 109 TW Alexander Dr., RTP, NC 27711

Phone: 919

‐ 541

‐ 2270

From: Gregory Stella [ mailto:gms@alpinegeophysics.com ]

Sent: Friday, January 30, 2015 11:26 AM

To: Weatherhead, Darryl

Cc: Langdon, Robin; Misenheimer, David; Eyth, Alison; Zubrow, Alexis; Simon, Heather; Gamas, Julia;

Possiel, Norm

Subject: Re: Ozone NAAQS Sensitivity/Control Data Request



### Hi Darryl,

Thanks for these responses. As of this AM, I st ill note that the "unknown" controls file has not

shown up in the docket. In fact , it appears as though nothing ne w has posted in the past two

weeks. Would you be so kind as to sending me a direct copy?

Thank you,

Greg

On 1/28/2015 2:36 PM, Weatherhead, Darryl wrote:

Hi Greg,

### 5 Last week we submitted a file with subregion

‐ level emissions reduction estimates from the "unknown"

controls to the docket. Depending on how busy the docket office is, the file should be publically

available within a few days.

Regarding county

‐ level emissions for the baseline, your assumptions are correct

– we analyzed

attainment of the alternative standards through (i) baseline DV changes from the base case, generated

by applying ozone response factors developed from multiple air quality sensitivity simulations to the

base case 2025 projections, and (ii) incremental emission reductions applied to the resulting baseline

DVs.

Lastly, we did not estimate emissions reductions monitor by monitor. We estimated the least amount of

emissions reductions needed to get all monitors in a subregion into attainment with the alternative

standards analyzed. That information is summarized in Tables 3A

‐ 3 through 3A

‐ 6 in Appendix 3A of the

RIA.

Thanks again for your interest in the ozone NAAQS proposal RIA.

Darryl

Darryl A. Weatherhead, Group Leader

Air Economics Group, HEID/OAQPS

U.S. EPA Office of Air and Radiation

MD C439

‐ 02, 109 TW Alexander Dr., RTP, NC 27711

Phone: 919

‐ 541

‐ 2270

From: Gregory Stella [ mailto:gms@alpinegeophysics.com ]

Sent: Tuesday, January 27, 2015 4:16 PM

To: Weatherhead, Darryl

Cc: Langdon, Robin; Misenheimer, David; Eyth, Alison; Zubrow, Alexis; Simon, Heather; Gamas, Julia;

Possiel, Norm; Gregory Stella

Subject: Re: Ozone NAAQS Sensitivity/Control Data Request



### Darryl,

Thanks for your quick reply.

I have calculated the monitor-level ozone sensitiv ity factors and wanted to check my calculations

against what you all had developed. In the absence of those data, I will proceed with my analysis

using my calculations.

For the unknown controls, it would be helpful to receive the data on th e subregional level you

indicate it was generated. At this time, I note only non-California unknown emissions reported in

Tables ES-4, 4-8, and 4-10 of the RIA. If these are the most geographically detailed level of

aggregation available, that inform ation would also be appreciated.

Finally, as I am looking at usi ng the baseline emissions to regionally compare the emission

reductions associated with the attainment of the alternate NAAQS standards (Section 4.2, page

### 6 4-5 of the RIA), and not of the reductions from th e explicit control scenarios and/or sensitivities,

I still am interested in the county-level emissions used for th e established baseline. By your note,

I will presume that these data were not developed and the approach used in the attainment of the

alternate NAAQS was a mix of (1 ) the baseline dv changes from the basecase, generated with

AQ modeling, and (2) incremental emission reducti ons applied to the re sulting baseline dv. If

this is a correct evaluation of the approach used in the attainment calc ulations, confirmation of

this method is also appreciated.

It would be most helpful if the resulting em ission reduction numbers that were used in the

various monitor level calculations of baseli ne and alternate NAAQS attainment (similar to

Examples 1-4 in Section 3A.4 of the RIA) were available for review. This would circumvent the

need for county-level baseline emissions and ad ditional calculations. For example, I still don't

know why Dallas (example 3) was estimated to require 44,000 tons reduction to achieve a 75.6

ppb concentration when a 75.9 ppb value demonstr ates attainment with the 2008 NAAQS (and

less than 11,000 tons NOx reduction required). If the delta emission values from the monitorlevel attainment calculations are availabl e, I would appreciate a copy of those.

Thank you,

Greg

On 1/27/2015 3:31 PM, Weatherhead, Darryl wrote:

Hi Greg,

Thanks for following up.

The worksheet in the docket includes what is needed to calculate monitor

‐ level ozone sensitivity factors

– the worksheet includes DVs and NOx emissions by subregion for the base case and sensitivity

cases. To get the sensitivity factors, you’d calculate the changes in DVs and divide by the changes in

NOx emissions. Were you asking about something different? For the emissions reductions from

unknown controls, we did not aggregate those emissions reductions at a level more detailed than the

subregion level.

Lastly, you requested county

‐ level 2025 baseline emissions levels from which explicit control scenarios

and sensitivities were compared and applied. In the RIA, the explicit control scenarios and sensitivities

were created from and compared to the base case not the baseline. We did not assemble a 2025

baseline emissions inventory for posting in the docket. Please let us know if we don’t correctly

understand your request or if you’d like to clarify.

Let us know if you have any additional questions.

Darryl

Darryl A. Weatherhead, Group Leader

Air Economics Group, HEID/OAQPS

U.S. EPA Office of Air and Radiation

MD C439

‐ 02, 109 TW Alexander Dr., RTP, NC 27711

Phone: 919

‐ 541

‐ 2270

### 7 From: Gregory Stella [ mailto:gms@alpinegeophysics.com ]

Sent: Tuesday, January 27, 2015 1:06 PM

To: Weatherhead, Darryl

Cc: Langdon, Robin; Misenheimer, David; Eyth, Alison; Zubrow, Alexis; Simon, Heather; Gamas, Julia;

Possiel, Norm; Gregory Stella

Subject: Re: Ozone NAAQS Sensitivity/Control Data Request



### Hi Darryl,

I was following up to see if there will be any additional information provided this week on the

ozone sensitivity factors, count y- or state-level emissions re ductions from unknown controls, and

county-level 2025 baseline emissions levels , as you note you would check below.

Thanks in advance,

Greg

On 1/23/2015 2:09 PM, Gregory Stella wrote:

Hi Darryl,

Thanks for your reply.

I have downloaded the CoST model from the CMAS site and appreciate you pointing me to its

location. You may want to modify the CoST website ( http://www.epa.gov/ttn/ecas/cost.htm ) to

indicate this location for future queries on its availability.

Thank you also for the recent uploads to the docket. I have downloaded th e explicit control case

file and look forward to reviewing the "unknow n" controls reduction estimates file once it

becomes available.

I also had previously downloaded the 111(d) IP M parsed files (when reviewing the CPP) and

was aware of those files and their availabilit y. Unfortunately, while the RIA indicates Parsed

File: Option 1 State, 2025, EPA-HQ-OAR- 2013-0602-0221 went into the sensitivity #1

(baseline) run, without a summary with which to compare these parsed files, I cannot positively

confirm the emissions in the ozone NAAQS baseline simulation. I presume this will be

information provided to me upon staff return (and to determine if they have 2025 county-level

baseline emission levels available) next week.

Thank you again for your response.

Greg

### 8 On 1/22/2015 3:50 PM, Weatherhead, Darryl wrote:

Hi Greg,

Thanks for your interest in the ozone NAAQS proposal RIA.

By way of background, EPA’s Control Strategy Tool (CoST) version 2.5 is available on the CMAS Center

website at the link below. Note that you’ll need to be logged in to CMAS to get to this page.

https://www.cmascenter.org/dow nload/software/cost/cost_2

‐ 5.cfm

The CoST training manual serves as a User’s Guide and is also available on the CMAS Center website at

the link below.

http://www.cmascenter.org/help/mode l_docs/cost/2.5/CoST_UsersGuide_2012

‐ 08

‐ 01_Final.pdf

The EMF/CoST repository is publicly available through GitHub at the link below. This repository includes

both the Java code that is used to build the server and client applications, and files with SQL statements

to create and update the database tables and stored procedures.

https://github.com/ddelvecchio/emf

Lastly, additional CoST documentation and the most recent set of control measures data are available

on the EPA CoST website at the link below.

http://www.epa.gov/ttn/ecas/cost.htm

Note that the control measures data posted on the EPA CoST website is the same data set that was used

for the 2014 Ozone NAAQS Proposal RIA. Because of resource constraints, EPA is not able to provide

any support for the installation or operation of CoST outside of the Agency.

We submitted a file with details on the explicit control case, as well as a file with subregion

‐ level

emissions reduction estimates from the "unknown" controls to the docket. Depending on how busy the

docket office is, these file should be publically available within a few days. We also confirmed that the

following IPM parsed files for the 111d cases are available in the noted docket: (1) Parsed File: Base

Case, 2025, EPA

‐ HQ

‐ OAR

‐ 2013

‐ 0602

‐ 0219; (2) Parsed File: Option 1 Regional, 2020, EPA

‐ HQ

‐ OAR

‐ 2013

‐

0602

‐ 0220; (3) Parsed File: Option 2 Regional, 2025, EPA

‐ HQ

‐ OAR

‐ 2013

‐ 0602

‐ 0222; and (4) Parsed File:

Option 1 State, 2025, EPA

‐ HQ

‐ OAR

‐ 2013

‐ 0602

‐ 0221.

Regarding information on ozone sensitivity factors, county

‐ or state

‐ level emissions reductions from

unknown controls, and county

‐ level 2025 baseline emissions levels, the staff that worked directly on

those portions of the analysis is out of the office until Monday, January 26 th

. We’ll check with staff early

next week and reach back out to you.

In the interim, please let me know if you have any additional questions.

Darryl

Darryl A. Weatherhead, Group Leader

Air Economics Group, HEID/OAQPS

U.S. EPA Office of Air and Radiation

### 9 MD C439

‐ 02, 109 TW Alexander Dr., RTP, NC 27711

Phone: 919

‐ 541

‐ 2270

From:

Sent: Wednesday, January 21, 2015 10:03 AM

To: Misenheimer, David

Cc: Eyth, Alison; Zubrow, Alexis; Simon, Heather; Langdon, Robin; Weatherhead, Darryl; Gamas, Julia;

Possiel, Norm; Gregory Stella

Subject: Re: Ozone NAAQS Sensitivity/Control Data Request



### David,

Thank you again for the reply.

Heather's worksheet did provide the resulti ng ozone design values calculated from the

application of the various contro l strategies and scenarios and that were the outcome of the

emission reductions and resulti ng air quality modeling applied ag ainst the 111(d) 2025 baseline.

These data have already been used in our review of the RIA and compared and confirmed against

assumptions noted by EPA.

We also recognize the availability of a complete set of control measures (via the CoST model

website; a model not available to the public) that could have been applied to individual sources

across the entire U.S. This information, however , does not provide us with the lists of the

specific controls that were applied to speci fic sources in the ozone NAAQS proposed rule

modeling runs. Without that info rmation, we can only speculate wh at controls (and where) were

actually applied in these scenarios.

Just to confirm and document our requests, neith er of those noted above are the files we are

currently interested in additionally obtaining.

What we are interested in obtaining is the underlying data that was used to create each individual

sensitivity control case and explicit control scenario. This would include the:

(1) calculated monitor-le vel ozone sensitivity factors (defined in Section 3.2.2 of the RIA) that

were used to determine "the least amount of em issions reductions (tons ) needed to bring the

ozone DVs at all monitors down to the particular NAAQS level",

(2) the explicit control scenario records that woul d allow us to confirm what sources, where, and

by how much each were reduced in e ach explicit control scenario,

(3) county- or State-level em ission reduction estimates from the "unknown" controls, and

(4) county-level 2025 baseline emission levels (111( d) scenario) from which the explicit control

scenarios and sensitivities were compared and applied. These data were also not found by us in

the Clean Power Plan docket.

### 10 Your email below confirms for me that these f iles are not currently in the docket and therefore

presumably not available for review by the public. If this assumption is incorrect, please let me

know.

I appreciate your responses to da te, the files provided and iden tified for my download from the

docket, and additional confirmation of data unavaila bility. Should any of thes e files be placed in

the docket prior to the conclusion of the comm ent period, I would appreciate notice of their

availability.

Thank you again for your responses,

Greg

Tue 1/20/2015 3:07 PM

Greg

– The files you listed below are not in the docket. Heather Simon provided a worksheet for the

docket with (i) projected ozone design values (DVs) from the 2025 base and twelve 2025 emissions

sensitivity simulations described in chapter 3 of the RIA and (ii) emissions summaries that were used in

the calculation of DVs for the scenarios of meeting various standard levels also described in chapter 3 of

the RIA.

Re control measures, I wanted to make sure you are aware that the control measures that we applied in

the O3 analysis are contained in the updated Control Measures Database (CMDB) files for stationary and

nonroad mobile sources posted at:

http://www.epa.gov/ttn/ecas/cost.htm

David Misenheimer

Environmental Engineer

Air Economics Group

Office of Air Quality Planning and Standards

U.S. Environmental Protection Agency

Room C441 E

Phone: (919) 541

‐ 5473

Fax: (919) 541

‐ 0839

E

‐ mail: misenheimer.david@epa.gov

Mailing Address:

109 T.W. Alexander Dr.

Mail Code: C439

‐ 02

Research Triangle Park, NC 27711

### 11 From: Gregory Stella [ mailto:gms@alpinegeophysics.com ]

Sent: Tuesday, January 20, 2015 2:12 PM

To: Misenheimer, David

Cc: Eyth, Alison; Zubrow, Alexis; Simon, Heather; Langdon, Robin; Weatherhead, Darryl; Gamas, Julia;

Possiel, Norm; Gregory Stella

Subject: Re: Ozone NAAQS Sensitivity/Control Data Request

David,

Thank you for your reply. It would be useful if you wo uld be willing to tell me which requested items (see list of

three below) are purportedly in the docket and which are not available.

1. Ozone sensitivity factors used in determining the emi ssion reduction requirements for each of the alternate

NAAQS levels.

2. County-level distribution of "unknown" control reductions necessary to meet each alternate level of the NAAQS.

3. Detailed emission reduction files for the four explic it sensitivity cases (111(d), California 200km buffer, Texas

200km buffer, and Northeast 200km buffer). These hopefully would be consistent in format with the files like

"Updated 2014 O3 RIA NOx Cntrl Strategy_60 ppb Incr to Baseline.xlsx".

Thank you,

Greg



### On 1/20/2015 11:15 AM, Misenheimer, David wrote:

Greg - The short answer is that if isn't in the docket, it's probably not

available.

For the 111(d) details, you should check the 111(d) docket.

I'm checking with others to see if any of the specific items you've requested

are posted somewhere, but so far the answers have been they are either in the

docket or not available.

David Misenheimer

Environmental Engineer

Air Economics Group

Office of Air Quality Planning and Standards

U.S. Environmental Protection Agency

Room C441 E

Phone: (919) 541-5473

Fax: (919) 541-0839

E-mail: misenheimer.david@epa.gov

Mailing Address:

109 T.W. Alexander Dr.

Mail Code: C439-02

Research Triangle Park, NC 27711

-----Original Message-----

From: Gregory Stella [ mailto:gms@alpinegeophysics.com ]

Sent: Friday, January 16, 2015 12:53 PM

To: Misenheimer, David

### 12 Cc: Eyth, Alison; Zubrow, Alexis; Simon, Heather; Langdon, Robin;

Weatherhead, Darryl; Gamas, Julia; Possiel, Norm; Gregory Stella

Subject: Re: Ozone NAAQS Sensitivity/Control Data Request

Hi David,

To follow up on my voice mail message inquiring as to your progress and

internal discussions, as you all are considering the requests made before, I

would like to add the following request and ask the following question:

1. Is there a county specific distribution to the unknown control reductions

necessary to meet each alternate level of the NAAQS? If so, I'd like to

request a file with that distribution.

2. I'd like to request a copy (electronic preferred) of the ozone sensitivity

factors used in determining the emission reduction requirements for each of

the alternate NAAQS levels.

Thank you,

Greg

On 1/15/2015 11:09 AM, Misenheimer, David wrote:

Greg - We're discussion your requests and will get back to you as soon as we

have an answer.

David Misenheimer

Environmental Engineer

Air Economics Group

Office of Air Quality Planning and Standards U.S. Environmental

Protection Agency

Room C441 E

Phone: (919) 541-5473

Fax: (919) 541-0839

E-mail: misenheimer.david@epa.gov

Mailing Address:

109 T.W. Alexander Dr.

Mail Code: C439-02

Research Triangle Park, NC 27711

-----Original Message-----

From: Gregory Stella [ mailto:gms@alpinegeophysics.com ]

Sent: Wednesday, January 14, 2015 5:09 PM

To: Misenheimer, David

Cc: Eyth, Alison; Zubrow, Alexis; Simon, Heather; Langdon, Robin;

Weatherhead, Darryl; Gamas, Julia; Possiel, Norm; Gregory Stella

Subject: Re: Ozone NAAQS Sensitivity/Control Data Request

Hi David,

And just to be clear, I'm also interested in the breakdown for

Scenario #1 (111(d)) in a form consistent with the files noted below. I

cannot seem to find those in the docket, either.

### 13 Thank you,

Greg

On 1/14/2015 7:40 AM, Gregory Stella wrote:

Hi David,

Thank you again for sending notice of these files. They will come in handy

when we review the attainment plans for each of the proposed ozone levels. I

am, however, more interested at this time in the similar sheets that detail

the explicit control cases (results summarized in Table 3-3) with the same

breakdown as the files you note below. I am working with the ozone response

calculations and their impact on monitor level air quality concentrations.

Are similar data available for these explicit control strategies? I was

unable to locate them in the docket.

Thank you,

Greg

On 1/13/2015 3:23 PM, Misenheimer, David wrote:

Greg - Regarding your question # 1, detailed emission reduction files will be

available soon in the docket (docket # epa-hq-oar-2013-0169).

These files include a source by source listing of emission reductions and

controls, including pollutant and fips code which would allow you to sum up

the emission reductions by pollutant (NOx, VOC), by geographic area (state or

county). Detailed files are currently in the docket but I am updating the

files to include more complete identifier information such as plant name and

unit ID. I submitted the updated files to the docket yesterday. They go

through a review process so I don’t know how long before they appear in the

docket, but hopefully it will be in the next day or so. There will be 6

updated files with the following names:

1) File: Updated 2014 O3 RIA NOx Cntrl Strategy_60 ppb

Incr to Baseline.xlsx

Link Name: Updated 2014 O3 NAAQS RIA Control Strategy Results -

NOx Controls for 60 ppb Analysis Incremental to Baseline

2) File: Updated 2014 O3 RIA NOx Cntrl Strategy_65 ppb

Incr to Baseline.xlsx

Link Name: Updated 2014 O3 NAAQS RIA Control Strategy Results -

NOx Controls for 65 ppb Analysis Incremental to Baseline

3) File: Updated 2014 O3 RIA NOx Cntrl Strategy_70 ppb

Incr to Baseline.xlsx

Link Name: Updated 2014 O3 NAAQS RIA Control Strategy Results -

NOx Controls for 70 ppb Analysis Incremental to Baseline

4) File: Updated 2014 O3 RIA VOC Cntrl Strategy_60 ppb

Incr to Baseline.xlsx

Link Name: Updated 2014 O3 NAAQS RIA Control Strategy Results -

VOC Controls for 60 ppb Analysis Incremental to Baseline

5) File: Updated 2014 O3 RIA VOC Cntrl Strategy_65 ppb

Incr to Baseline.xlsx

Link Name: Updated 2014 O3 NAAQS RIA Control Strategy Results -

### 14 VOC Controls for 65 ppb Analysis Incremental to Baseline

6) File: Updated 2014 O3 RIA VOC Cntrl Strategy_70 ppb

Incr to Baseline.xlsx

Link Name: Updated 2014 O3 NAAQS RIA Control Strategy Results -

VOC Controls for 70 ppb Analysis Incremental to Baseline

If you do not need the additional identifier information, you can download

the files that are currently posted to the docket. Just search for the 6

files containing the phrase "2014 O3 NAAQS RIA Control Strategy Results".

They are in the Document Type category of "Supporting & Related Material".

Re your question # 2, the across the board reductions were for all

anthropogenic sectors, so onroad emissions were included in those cuts.

Let me know if there is anything else I can help with.

David Misenheimer

Environmental Engineer

Air Economics Group

Office of Air Quality Planning and Standards U.S. Environmental

Protection Agency

Room C441 E

Phone: (919) 541-5473

Fax: (919) 541-0839

E-mail: misenheimer.david@epa.gov

Mailing Address:

109 T.W. Alexander Dr.

Mail Code: C439-02

Research Triangle Park, NC 27711

-----Original Message-----

From: Simon, Heather

Sent: Tuesday, January 13, 2015 2:43 PM

To: Langdon, Robin; Weatherhead, Darryl; Gamas, Julia; Misenheimer,

David; Possiel, Norm

Cc: Eyth, Alison; Zubrow, Alexis

Subject: FW: Ozone NAAQS Sensitivity/Control Data Request

Hi All,

Please see request for additional information about emissions reductions

below. I can respond to Greg with the answer to question #2 but I wasn't

sure if we are publically providing any more refined spatial information on

the emissions reductions for the various scenarios.

-Heather

-----Original Message-----

From: Gregory Stella [ mailto:gms@alpinegeophysics.com ]

Sent: Tuesday, January 13, 2015 2:32 PM

To: Simon, Heather

Cc: Possiel, Norm; Dennis McNally; Gregory Stella

Subject: Re: Ozone NAAQS Sensitivity/Control Data Request

Hi Heather,

### 15 Thank you again for the design value spreadsheets from the attached email. I

have two additional requests with which I hope you can help me.

(1) I am interested in obtaining the emission reduction values, by State or

region, that are associated with each of the control cases listed in the

proposal RIA. I note that the RIA provides summaries of emissions by source

sector or region (Tables 3-1 and 3-3) and summaries of emission reductions by

control type (Tables 4A-5 through 4A-12), but doesn't provide a geographic

breakdown of the individual State or region reductions by source or control

type (e.g., NOx reductions from Low Emission Combustion - Gas Fired Lean

Burn IC Engines in the Northeastern region or non-EGU point source reductions

in the Midwest). The purpose of this request is to see where each of these

emission sectors or control types is achieving the greatest emission

reduction impact. Since the CoST tool used to develop your scenarios is not

being made available to the public ( http://www.epa.gov/ttn/ecas/cost.htm ),

there is no way that we can independently generate these results from the

inventories and additional instructional information provided in the RIA.

(2) In the across the board anthropogenic NOx and VOC emission reduction

scenarios, please confirm whether you included reductions from onroad mobile

sources.

Thanks in advance,

Greg

On 12/18/2014 9:55 PM, Simon, Heather wrote:

Hi Greg,

The attached spreadsheet was submitted to the docket for the proposed ozone

rule RIA. I believe this contains the information you are interested

in. Please note that the Column entitled 2009-2011 DV actually represents

the 5-year weighted 2009-2013 DV data as described in chapter 3 of the RIA.

Please let us know if this satisfies the request below.

Thanks,

Heather

-----Original Message-----

From: Gregory Stella [ mailto:gms@alpinegeophysics.com ]

Sent: Thursday, December 18, 2014 9:12 AM

To: Possiel, Norm; Simon, Heather

Cc: Dennis McNally; Gregory Stella

Subject: Ozone NAAQS Sensitivity/Control Data Request

Hi Heather & Norm,

I'll follow this email with a phone call this afternoon.

First, thanks for working with Dennis last week and getting us in the queue

to receive the base ozone NAAQS modeling data from the proposed rule. It

sounds like most of the details had been worked out and that we may be

waiting on a determination on what configuration of drives would be best to

send you for this transfer.

### 16 Let me know if there are other issues that we need to be addressing in the

meanwhile.

Additionally, we are also interested (separate request) in obtaining the

monitor-level ozone dv results (and differences from 2025 base case) for each

of the twelve emission sensitivity simulations documented in Sections 3.1.4

and 4 of the proposed rule RIA. Our intention with these data is to explore

other illustrative control strategy options by looking at different

configurations of the sensitivity results than what have been presented in

the RIA.

If these data are accessible via web or FTP, we can pull them down if you

would please point their location out to us. If the data have not been made

publicly available, we'd like to request them at this time and determine the

best way of getting the data transferred from you.

Please let me know if there is a best time this afternoon to call.

Thanks!

Greg

--

Gregory Stella

Alpine Geophysics, LLC

gms@alpinegeophysics.com

828-675-9045