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Emission Event Reporting Database

Regulated entity 

name

DUPONT SABINE 

RIVER WORKS

Physical 

location

DUPONT SABINE RIVER 

WORKS ON FM 1006

Regulated entity 

RN number RN100542711 City, County ORANGE, ORANGE

Type(s) of air 

emissions event: EMISSIONS EVENT Event began: 09/01/2014 9:20AM

This is based on 

the: FINAL REPORT Event ended: 09/01/2014 9:24AM

Cause While pressuring up #7 hyper discharge Rupture Disk was blown.

Action taken #7 Hyper compressor was immediately shut down, valved out, and 

set up for the rupture disk replacement.

Emissions 

estimation method From IP21 Data and Technical Calculations

Source 1: #7 Hyper Compressor Discharge Rupture Disk , EPN number PLUM-C

Contaminant Authorization Limit Amount 

Released

Ethylene 

(gaseous) 

No specific authorization for the facility. 

Permit 9176. 0.0 6239.0 lbs (est.)

Methanol No specific authorization for the facility. 

Permit 9176. 0.0 101.0 lbs (est.)

Source 2: #7 Hyper Compressor Discharge Rupture Disk , FIN number PLUMC

Source 3: CDG , FIN number 

No other sources
Emission Event Reporting Database

Regulated entity 

name

DOW TEXAS 

OPERATIONS FREEPORT

Physical 

location

Regulated entity RN 

number RN100225945 City, County FREEPORT, BRAZORIA

Type(s) of air 

emissions event: EMISSIONS EVENT Event began:

01/08/2015 

8:58AM

This is based on the: FINAL REPORT Event 

ended:

01/08/2015 

9:01AM

Cause An increase in pressure caused Pressure Safety Valve-151 

to lift.

Action taken System pressure was reduced.

Emissions 

estimation method Engineering calculations.

Source 1: Low pressure Ethylene feed line , FIN number OC5U5FU3

Source 2: OC5 Unit 5 , FIN number 

Source 3: PSV-151 , EPN number N/A

Contaminant Authorization Limit Amount 

Released

Ethylene, 

gaseous 

NSR 19041 No specific emission 

limit 0.0 90.0 lbs (est.)

No other sources
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: 10/17/2014 10:06PM

This is based 

on the: FINAL REPORT Event ended: 10/17/2014 11:44PM

Cause

The pressure setting on the tank systems transfer lines was exceeded and 

the pressure setting on the conservation vent on hazardous waste tank 

36TK-59 was exceeded and emissions were vented from the tank to the 

atmosphere.

Action taken

Pumping of liquid into the hazardous waste transfer line from another plant 

area was stopped. The pressure on the hazardous waste line was reduced 

and the venting of air emissions from the conservation vent on tank 36TK59 was stopped.

Emissions 

estimation 

method

Engineering calculations. Please note that upon further review, this release 

event was determined to be not reportable. Eastman’s initial STEERS report 

dated 10/18/2014 was made in an excess of caution. Neither of the initially 

reported butyraldehyde chemicals exceeded the 100-pound reportable 

quantity. Therefore, this was not reportable under 30 TAC 101.201.

Source 1: Hazardous Waste Tank , FIN number OX048T59

Source 2: Tank Vent , EPN number 048T59

Contaminant Authorization Limit Amount 

Released

Butyraldehyde NSR Permit No. 21832 for total VOC. No 

emissions authorized during upset conditions.

32.1 

LBS/HR

61.14 lbs 

(est.)

Isobutyraldehyde NSR Permit No. 21832 for total VOC. No 

emissions authorized during upset conditions.

32.1 

LBS/HR

24.5 lbs 

(est.)

Source 3: Texanol - Nitriles/MIPK Area , FIN number 

No other sources

Emission Event Reporting Database
Regulated 

entity name

LYONDELL CHEMICAL BAYPORT 

CHOATE PLANT

Physical 

location KM 579Q

Regulated 

entity RN 

number

RN102523107 City, County PASADENA, HARRIS

Type(s) of 

air emissions 

event:

EMISSIONS EVENT Event began: 10/19/2014 3:43PM

This is based 

on the: FINAL REPORT Event ended: 10/19/2014 9:29PM

Cause

A transmission line fault on the Centerpoint electric grid outside of the 

facility caused a power failure. This resulted in multiple shutdowns of plant 

process equipment and activated a number of plant safety systems. Four 

RVs lifted to atmosphere, and other systems vented to the Plant 2 and 

Plant 3 emergency flares.

Action taken

Plant procedures were followed to reset interlocks and reduce flows to the 

flare system. Once power was restored, processes were restarted and 

stabilized to normal operation.

Emissions 

estimation 

method

Process data and engineering calculations were utilized to quantify the 

emissions.

Source 1: PO/TBA & Derivative Fugitives , EPN number E-BLOFUG

Contaminant Authorization Limit Amount Released

Acetone NSR Permit 9395 0.0 2.13 lbs (est.)

t-Butyl Alcohol NSR Permit 9395 0.0 30.5 lbs (est.)

Source 2: PO/TBA &Derivative Fugitives , FIN number BLOFUG

Source 3: PO/TBA &Derivative Fugitives , FIN number 

Source 4: Plant 2 Emergency Flare , EPN number E-B1501B

Contaminant Authorization Limit Amount Released

Acetone NSR Permit 9395 0.0 129.07 lbs (est.)

Carbon Monoxide NSR Permit 9395 0.0 637.63 lbs (est.)

Ethane NSR Permit 9395 0.0 8.66 lbs (est.)

Isobutane NSR Permit 9395 0.0 1465.2 lbs (est.)

Isobutylene NSR Permit 9395 0.0 3.33 lbs (est.)
Isobutylene Oxide NSR Permit 9395 0.0 5.85 lbs (est.)

Methanol NSR Permit 9395 0.0 4.96 lbs (est.)

Nitrogen oxide NSR Permit 9395 0.0 276.9 lbs (est.)

Propane NSR Permit 9395 0.0 24.99 lbs (est.)

Propylene (Propene) NSR Permit 9395 0.0 24.4 lbs (est.)

Propylene oxide NSR Permit 9395 0.0 260.29 lbs (est.)

n-butane NSR Permit 9395 0.0 75.45 lbs (est.)

t-Butyl Alcohol NSR Permit 9395 0.0 204.77 lbs (est.)

Source 5: Plant 2 Emergency Flare , FIN number B1501B

Source 6: Plant 2 Emergency Flare , FIN number 

Source 7: Plant 3 Emergency Flare , EPN number E-B1501C

Contaminant Authorization Limit Amount Released

Acetone NSR Permit 9395 0.0 6.83 lbs (est.)

Carbon Monoxide NSR Permit 9395 0.0 74.68 lbs (est.)

Ethane NSR Permit 9395 0.0 2.21 lbs (est.)

Isobutane NSR Permit 9395 0.0 105.76 lbs (est.)

Nitrogen oxide NSR Permit 9395 0.0 28.72 lbs (est.)

Propane NSR Permit 9395 0.0 7.71 lbs (est.)

Propylene (Propene) NSR Permit 9395 0.0 50.69 lbs (est.)

Propylene oxide NSR Permit 9395 0.0 5.72 lbs (est.)

n-butane NSR Permit 9395 0.0 4.84 lbs (est.)

t-Butyl Alcohol NSR Permit 9395 0.0 19.19 lbs (est.)

Source 8: Plant 3 Emergency Flare , FIN number B1501C

Source 9: Plant 3 Emergency Flare , FIN number 

No other sources
Emission Event Reporting Database

Regulated

entity name

LYONDELL CHEMICAL 

BAYPORT CHOATE PLANT

Physical 

location KM 579Q

Regulated 

entity RN 

number

RN102523107 City, County PASADENA, 

HARRIS

Type(s) of 

air emissions 

event:

EMISSIONS EVENT Event began: 01/21/2015 

9:12AM

This is based 

on the: FINAL REPORT Event ended: 01/21/2015 10:01AM

Cause

TBA from the process was lined up to tank F-1250B. The material in 

the tank flashed, increasing the pressure in the tank. The RVs on 

tanks F-1250B and F-1250A lifted. The RV on F-1250B did not 

reseat on its own due to the guides becoming misaligned when it 

lifted.

Action taken

The RV on F-1250A reseated when pressure was reduced. 

Operations personnel manually realigned the RV on F-1250B, and it 

reseated.

Emissions 

estimation 

method

Process data and engineering calculations were utilized to quantify 

the emissions.

Source 1: PO/TBA & Derivatives Fugitives , EPN number E-BLOFUG

Contaminant Authorization Limit Amount Released

Acetone NSR 9395 0.0 16.0 lbs (est.)

Isobutylene Oxide NSR 9395 0.0 2.0 lbs (est.)

Methyl ethyl ketone (MEK) NSR 9395 0.0 1.0 lbs (est.)

t-Butyl Alcohol NSR 9395 0.0 298.0 lbs (est.)

Source 2: PO/TBA & Derivatives Fugitives , FIN number BLOFUG

Source 3: PO/TBA & Derivatives Fugitives , FIN number 

No other sources

Emission Event Reporting Database
Regulated 

entity name

LYONDELL CHEMICAL 

BAYPORT CHOATE PLANT

Physical 

location KM 579Q

Regulated 

entity RN 

number

RN102523107 City, County PASADENA, 

HARRIS

Type(s) of 

air emissions 

event:

EMISSIONS EVENT Event began: 07/30/2014 

8:50AM

This is based 

on the: FINAL REPORT Event ended: 07/30/2014 10:10AM

Cause Tank F-1208 hatch lift due to nitrogen blow through during 

offloading of a tank truck.

Action taken Hatch was reseated and release stopped.

Emissions 

estimation 

method

Laboratory analysis was used to determine material composition. 

The initial part of the release assumed the entire tank headspace 

volume of saturated vapor was released. A shallow pool calculation 

was used to estimate release quantities for the remaining time.

Source 1: PO/TBA and Derivatives Fugitives , EPN number BLOFUG

Contaminant Authorization Limit Amount Released

Acetone NSR 9395 0.0 14.66 lbs (est.)

Isobutylene NSR 9395 0.0 12.0 lbs (est.)

Methanol NSR 9395 0.0 1.53 lbs (est.)

Methyl ethyl ketone (MEK) NSR 9395 0.0 1.21 lbs (est.)

t-Butyl Alcohol NSR 9395 0.0 372.15 lbs (est.)

Source 2: PO/TBA and Derivatives Fugitives , FIN number E-BLOFUG

Source 3: PO/TBA and Derivatives Fugitives , FIN number 

No other sources

Emission Event Reporting Database
Regulated 

entity name

UNION CARBIDE TEXAS 

CITY

Physical 

location KEY MAP 737M

Regulated 

entity RN 

number

RN100219351 City, County TEXAS CITY, 

GALVESTON

Type(s) of air 

emissions 

event:

EMISSIONS EVENT Event began: 08/19/2011 9:00AM

This is based 

on the: FINAL REPORT Event ended: 09/04/2011 7:00AM

Cause

A pressure regulator malfunctioned and allowed ethylene to leak 

by undetected, resulting in unauthorized emissions and an RQ 

exceedance.

Action taken The regulator was repaired promptly upon discovery.

Emissions 

estimation 

method

Process Knowledge and Emission Monitoring data were used to 

determine the quantities.

Source 1: Ethylene Vaporizer , FIN number 

Source 2: Ethylene Vaporizer , FIN number 

Source 3: TCO Site Flare , EPN number E09A032

Contaminant Authorization Limit Amount Released

Carbon Monoxide 436 2.26 LBS/HR 12.93 lbs (est.)

Ethylene, gaseous 436 0.01 LBS/HR 1821.33 lbs (est.)

Nitrogen oxide 436 0.29 LBS/HR 2.51 lbs (est.)

No other sources

Emission Event Reporting Database
Regulated 

entity name

UNION CARBIDE TEXAS 

CITY Physical location KEY MAP 737M

Regulated 

entity RN 

number

RN100219351 City, County TEXAS CITY, 

GALVESTON

Type(s) of 

air emissions 

event:

EMISSIONS EVENT Event began: 11/06/2010 2:30PM

This is based 

on the: FINAL REPORT Event ended: 11/07/2010 7:45AM

Cause

PSV 18829 began leaking and did not reseat itself. Preceeding the event, 

the pressure below the valve did not exceed the 160 PSIG setpoint nor did 

it reach the 5% blow-down pressure of 152 PSIG. The leak was not 

immediately discovered due to the low rate at which it was venting, relative 

to the total amount of gas being processed in the system. This allowed the 

system to stabilize at the given leak rate and not be immediately 

discernable to operations. Upon removal for inspection, there were no 

failures discovered in the PSV that would cause it to leak and then 

successfully reseat.

Action taken

Once detected, operations was successfully able to reseat the PSV. As a 

short-term action to reduce the likelihood of recurrence, the system 

operating pressure was reduced 5 PSIG. This provides additional buffer 

between the operating and PSV set pressures. Since the inspection of the 

PSV did not substantiate a failure mechanism, other PSV's on the system 

will be removed and inspected during an upcoming outage in January 2011 

to look for evidence that may help to explain the cause of this event and to 

minimize the chances of a similar incident occurring in the future. As a 

long-term corrective action, a project is being initiated to identify PSV's 

that present elevated risk with respect to 1) the ability to quickly identify a 

leak and 2) potential release quantity. PSV's deemed to meet this criteria 

will be addressed on a case-by-case basis, with the intent to reduce the 

likelihood and and duration of future failures.

Emissions 

estimation 

method

VOC emissions associated with this event were estimated using process 

data and a material balance. 1.How many reportable and recordable 

emissions events (including this incident) have occurred at the 

facility/facilities contributing emissions during this incident for the 12 

month period prior to this incident? ¿This is the only incident to occur 

during the preceding 12-month period. 2.What were the facility/facilities 

total actual operating hours during the past 12 months? ¿The actual 

operating hours of the LPO-12 #1 VPH Unit from 11/7/2009 ¿ 11/6/2010 

were 8304. 3.Identify the cause or causes of the emissions event and 

include all contributing factors that led to the emissions event. Discuss how 

the emissions event could not have been avoided by good design, 

maintenance, and operation practices, if applicable. Discuss any sudden 

breakdown of equipment or process that was beyond the owner/operator¿s 

control, if applicable. ¿This event was caused by the premature (before the 

pressure reached the PSV pressure set point) lifting of PSV 18829. The PSV 

was found leaking and was immediately reseated by operations. Review of 
process data indicates that the set pressure of the PSV was never 

exceeded. Further review failed to find any initiating event or external force

acting on the PSV to precipitate its premature lifting. When PSV 18829 was 

later removed from service and examined, the valve started unseating 30 

psi before the set point. The facility involved in this emissions event was 

designed, maintained, and operated in accordance with industry 

specifications and procedures. The emissions event could not have been 

avoided in this case. 4.How were the air pollution control equipment or 

processes (if any) maintained and operated in a manner consistent with 

good practice for minimizing emissions and reducing the number of 

emissions events? ¿This event had no impact on the operation of air 

pollution control equipment and processes located at the Texas City Site; 

all control devices are maintained and operated as required. 5.How soon 

was action taken to achieve compliance once the operator knew or should 

have known that applicable emission limitations were being exceeded? 

¿Upon discovery of the leaking safety valve, operations immediately 

reseated it to stop the leak. 6.How were the amount and duration of the 

unauthorized emissions and any bypass of pollution control equipment 

minimized? ¿Upon discovery of the leaking safety valve, operations 

immediately reseated it to stop the leak. There was no bypass of pollution 

control equipment. 7.What was the operational status of all emission 

monitoring systems at the facility/facilities during this emissions event? If 

any emission monitoring systems were not kept in operation during the 

emissions event, explain why they weren¿t kept in operation. ¿There are no 

emission monitoring systems associated with the facility involved in the 

event. 8.How were the owner or operator¿s actions in response to the 

unauthorized emissions contemporaneously documented? ¿Plant operating 

notes document actions performed by operations in response to the event. 

9.Have other similar incidents occurred at this/these facility/facilities in the 

past that might be indicative of inadequate design, operation, or 

maintenance? ¿No similar incidents have occurred in the last 12 months. 

10.Identify any information you have (e.g., complaints from neighbors, 

fence line monitoring

Source 1: LPO-12 #1 VPH , FIN number 

Source 2: PSV 18829 , EPN number N/A

Contaminant Authorization Limit Amount Released

Butyraldehyde NSR 9085 0.0 5856.0 lbs (est.)

Isobutyraldehyde NSR 9085 0.0 532.0 lbs (est.)

Source 3: PSV 18829 , FIN number 

No other sources