# Exhibit A

USCA Case #14-1083 Document #1514095 Filed: 09/25/2014 Page 1 of 3Emission Event Report

http://www11.tceq.texas.gov/oce/eer/index.cfm?fuseaction=main.getDetails&target=150219 [9/11/2014 3:38:29 PM] 

## Emission Event Reporting Database Regulated entity name EASTMAN CHEMICAL TEXAS OPERATIONS Physical location GREGG AND HARRISON COUNTIES Regulated entity RN number RN100219815 City, County LONGVIEW, HARRISON Type(s) of air emissions event: EMISSIONS EVENT Event began: 02/02/2011 12:30PM

This is based on the: FINAL REPORT Event ended: 02/03/2011 5:45PM

Cause The debutanizer column over pressured when the process line to the pressure transmitters on the column froze due to very low, prolonged wind chill temperatures. This transmitter typically sees material that is approximately 200°F and, upon information and belief, Eastman has found no evidence that it has frozen in the past. This overpressure caused the relief valve on the column to relieve to the flare as designed. Once pressure control was re-established, the relief valve malfunctioned by failing to close completely and had to be replaced.

Action

taken The pressure of the column was manually corrected while the process line to the pressure transmitters was thawed. The line is also now scheduled to be insulated. Once it was determined that the relief valve had not closed completely, the relief valve contractor made several attempts to get the valve to close but it was determined that the valve had to be replaced. The replacement was expedited, including shipment of the valve components from Corpus Christ, assembly and testing of the new valve and installation which involved specially trained maintenance and safety personnel. Emissions estimation method Engineering Best Estimates.


## Source 1: Flare , EPN number 225FL1 SITE SEARCH:

SUBJECT INDEX Air Water Waste
Search TCEQ Data Agency Organization Map USCA Case #14-1083 Document #1514095 Filed: 09/25/2014 Page 2 of 3Emission Event Report

http://www11.tceq.texas.gov/oce/eer/index.cfm?fuseaction=main.getDetails&target=150219 [9/11/2014 3:38:29 PM] Contaminant Authorization Limit Amount Released Butadiene, 1- 3 NSR Permit No. 8539. No specific emissions authorized for this EPN during upset conditions. 0.0 943.9 lbs (est.)
Butanes NSR Permit No. 8539. No specific emissions authorized for this EPN during upset conditions. 0.0 73.0 lbs (est.) Butylene NSR Permit No. 8539. No specific emissions authorized for this EPN during upset conditions. 0.0 497.0 lbs (est.) Carbon Monoxide NSR Permit No. 8539. No specific emissions authorized for this EPN during upset conditions. 0.0 502.8 lbs (est.)
Other NSR Permit No. 8539. No specific emissions authorized for this EPN during upset conditions. 0.0 4.6 lbs (est.) Oxides of Nitrogen (NOx) NSR Permit No. 8539. No specific emissions authorized for this EPN during upset conditions. 0.0 69.6 lbs (est.) 

## Source 2: Flare , FIN number OL225FL1 Source 3: Hydrocarbon Cracking Plant No.4 (HCC-4) , FIN number Source 4: Vent System , FIN number OL226VS1 No other sources

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