1 

### Kelly, Shaheerah

From: Dwight Mallory <dmallory@ResoluteEnergy.com>

Sent: Friday, April 13, 2012 9:19 AM

To: Andrew Chew

Cc: Patrick Flynn; John Jacus

Subject: RE: McElmo Creek Unit Follow Up

Attachments: ME-PFD-100-Ca.pdf; Stage 2 CO2 Reinject ion Compressor-Glycol Dehydration.pdf



### Andrew,

Attached is a process flow diagram for the proposed dehydrator installation at the MCU reinjection facility. I also

included an as

‐ built drawing for the existing dehydrator. I think you have this information already, but it turned up

during my document search so I thought I’d send a copy.

Currently, the reinjection facility receives 12 to 24 MMCFD of CO2 rich produced gas from the field. The produced gas is

compressed for reinjection to the field by 4 existing electric powered reciprocal compressors (C5, HOS 6, HOS 4 and

AGCB). Only the HOS 6 has the ability to send gas to the existing dehydrator. This limits the current dehydrator capacity

to ≤ 6 MMCFD.

The new electric screw compressors (C

‐ 101, C

‐ 102, C

‐ 103) shown on the attached process flow diagram will replace the

facility’s existing reciprocal compressors and will be configured to send all of the produced gas to the proposed

dehydrator prior to reinjection. Installation of the new screw compressors and proposed dehydrator will handle the

current production of 12 to 24 MMCFD, as well as provide capacity for additional production up to 50 MMCFD. The

ability to dehydrate all of the gas prior to reinjection will also eliminate many corrosion and freezing issues with the

facility discharge piping that have contributed to compressor downtime and flaring of gas.

Hopefully, this will get you closer to having everything you need.

Thanks.

Dwight E. Mallory

Environmental, Health & Safety Coordinator

Resolute Energy Corporation

1675 Broadway, Suite 1950

Denver, CO 80202

Direct: 303-573-4886 X 1165

Cell: 970-302-8620

Email: dmallory@ResoluteEnergy.com

From: Andrew Chew [mailto:Chew.Andrew@epamail.epa.gov]

Sent: Wednesday, April 11, 2012 5:11 PM

To: Dwight Mallory

Subject: RE: McElmo Creek Unit Follow Up

Hi Dwight,

Thanks for the e-mail. Yeah, we need the information to help us move this forward. I'd like to get this wrapped up. Let's

hope the contracting company or even some other person/source has the information (i.e., compressor configuration, and

volume flows pre- and post-project) to make this happen. Thanks.

- Andrew2 ------------------------------------------- Andrew Chew, P.E.

T: (415) 947-4197 | F: (415) 947-3579 | chew.andrew@epa.gov

U.S. EPA, Region 9, Air Permits Office (AIR-3 ) | 75 Hawthorne St., San Francisco, CA 94105

From: "Dwight Mallory" < dmallory@ResoluteEnergy.com >

To: Andrew Chew/R9/USEPA/US@EPA

Date: 04/11/2012 02:00 PM

Subject: RE: McElmo Creek Unit Follow Up

Andrew,

I was going through my list of unfinished projects and it discovered that you’ve been waiting on information from me while I thought

I was waiting on a phone call from you.

I haven’t been able to find the process flow diagram you requested for the proposed dehydrator installation. The operations

engineer who was supervising this project for us has since left the company so it’s been difficult tracking the information down.

I have contacted the contract engineering firm that did the original design and requested the information. I have been out of the

office quite a bit since we last spoke, but will be able to keep after this more diligently until I can get you the information you need.

In the meantime, please call me at your convenience if you need anything else.

Dwight E. Mallory

Environmental, Health & Safety Coordinator

Resolute Energy Corporation

1675 Broadway, Suite 1950

Denver, CO 80202

Direct: 303-573-4886 X 1165

Cell: 970-302-8620

Email: dmallory@ResoluteEnergy.com

From: Dwight Mallory

Sent: Friday, March 16, 2012 3:17 PM

To: 'Andrew Chew'

Subject: RE: McElmo Creek Unit Follow Up

Thanks for the reminder Andrew. I am in the office all next week and can talk at your convenience. I have put out feelers with our

engineering group looking for the process flow diagrams we discussed and will follow up with them in the meantime and see if we

have anything.

Dwight E. Mallory

Environmental, Health & Safety Coordinator

Resolute Energy Corporation

1675 Broadway, Suite 1950

Denver, CO 80202

Direct: 303-573-4886 X 1165

Cell: 970-302-8620

Email: dmallory@ResoluteEnergy.com

From: Andrew Chew [mailto:Chew.Andrew@epamail.epa.gov]3 Sent: Friday, March 16, 2012 2:18 PM

To: Dwight Mallory

Subject: Fw: McElmo Creek Unit Follow Up

Hi Dwight,

As I'm writing this friendly reminder, I hope things are goi ng okay. Will you be able to talk next week? Thanks.

- Andrew

------------------------------------------- Andrew Chew, P.E.

T: (415) 947-4197 | F: (415) 947-3579 | chew.andrew@epa.gov

U.S. EPA, Region 9, Air Permits Office (AIR-3 ) | 75 Hawthorne St., San Francisco, CA 94105

----- Forwarded by Andrew Chew/R9/USEPA/US on 03/16/2012 01:16 PM -----

From: Andrew Chew/R9/USEPA/US

To: "Dwight Mallory" < dmallory@ResoluteEnergy.com >

Date: 03/06/2012 11:32 AM

Subject: Re: McElmo Creek Unit Follow Up

Dwight,

I'm replying to acknowledge receipt of your e-mail and I'm so rry to hear about your loss. We'll touch base later.

- Andrew

------------------------------------------- Andrew Chew, P.E.

T: (415) 947-4197 | F: (415) 947-3579 | chew.andrew@epa.gov

U.S. EPA, Region 9, Air Permits Office (AIR-3 ) | 75 Hawthorne St., San Francisco, CA 94105

From: "Dwight Mallory" < dmallory@ResoluteEnergy.com >

To: Andrew Chew/R9/USEPA/US@EPA

Date: 03/06/2012 10:57 AM

Subject: McElmo Creek Unit Follow Up

Andrew,

I wanted to let you know that I haven’t forgotten about the process information you requested. I’ve been out of the office this week

due to a death in the family, but I will be back in on Thursday and will get you the requested information as soon as possible.

Dwight Mallory

Environmental, Health & Safety Coordinator

Resolute Natural Resources Company