3:20 p.m. Update

The Office of Conservation, following discussions with Assumption Parish Incident Command, has issued a new order to Texas Brine, directing the company to conduct new tests to further assess conditions in the vicinity of the company’s Oxy Geismar 2 cavern, located to the east of the failed Oxy Geismar 3 cavern. In recent weeks, the seismic monitoring system that Conservation ordered Texas Brine to install has detected increased seismic activity that appears to have been located in or near the eastern wall of the original Oxy Geismar 3 cavern.

The number and strength of the seismic events, while elevated, have since diminished and were much lower than those witnessed in previous major events such as sinkhole sloughing or the initial failure of Oxy Geismar 3. Though that activity has decreased and the two caverns are several hundred feet apart, the Office of Conservation is requiring a full assessment of the Oxy Geismar 2 cavern to ensure protection of the public and the environment – ordering Texas Brine to conduct a pressurized Mechanical Integrity Test, run a new top-to-bottom sonar survey and develop an action plan if any issues are identified. While the strength and number of events in the recent seismic activity are not, by themselves, indicative of significant new problems, part of the purpose of the seismic monitoring network is to detect activity at an early stage and give time to assess whether additional actions are necessary.

A copy of the directive is available on DNR’s Bayou Corne web page at http://dnr.louisiana.gov/assets/OC/BC_All_Updates/ORDER_DIRECTIVES/Emergency.11th.08.2014.pdf

1:00 p.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Monday, August 4 work-

Sinkhole Activity Code 2 – indicating work is not allowed on sinkhole and within containment berms. Seismic monitoring indicates increased levels of subsurface activity near sinkhole/Oxy 3.

Air Monitoring/Sub-slab Sampling and Ventilation

- Conducting ventilation system inspections

ORW/CPT Wells

- Continuing pumping on ORWs 4 (northwest of containment berm), 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm), 54 (west of Bayou Corne, south of La 70), 57 (southeast of Oxy 9 well pad)

- Managing water produced from passive vent wells in bayou

- Monitoring flow rate and water production from passive vent wells

Containment/ Roads/ Sinkhole/Survey

- Conducting daily berm inspections

11:25 a.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Friday, August 1 work-

Sinkhole Activity Code 2 – indicating work is not allowed on sinkhole and within containment berms. Seismic monitoring indicates increased levels of subsurface activity near sinkhole/Oxy 3.

  

Air Monitoring/Sub-slab Sampling and Ventilation

- Conducting ventilation system inspections

ORW/CPT Wells

- Continuing pumping on ORWs 4 (northwest of containment berm), 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm), 54 (west of Bayou Corne, south of La 70), 57 (southeast of Oxy 9 well pad)

- Monitoring flow rate and water production from passive vent wells

Containment/ Roads/ Sinkhole/Survey

- Conducting daily berm inspection

- Transferring water from passive vent wells to sinkhole in-flows 

4:00 p.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity
Tuesday, July 29 work-
Sinkhole Activity Code 2 – indicating work is not allowed on sinkhole and within containment berms. Seismic monitoring indicates increased levels of subsurface activity near sinkhole/Oxy 3.

Air Monitoring/Sub-slab Sampling and Ventilation
– Conducting ventilation system inspections

ORW/CPT Wells
– Continuing pumping on ORWs 4 (northwest of containment berm), 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm), 54 (west of Bayou Corne, south of La 70), 57 (southeast of Oxy 9 well pad)
– Managing water produced from passive vent wells in bayou
– Monitoring flow rate and water production from passive vent wells

Containment/ Roads/ Sinkhole/Survey
– Conducting daily berm inspections
– Sampling sinkhole in-flow water
– Installing passive vent well near bubble site 47 (north west of containment berm)

11:10 a.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Monday, July 28 work-

Sinkhole Activity Code 1 – indicating work is allowed on sinkhole and within containment berms. Seismic monitoring indicates low levels of subsurface activity near sinkhole/Oxy 3.

Air Monitoring/Sub-slab Sampling and Ventilation

- Conducting ventilation system inspections 

ORW/CPT Wells

- Continuing pumping on ORWs 4 (northwest of containment berm), 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm), 54 (west of Bayou Corne, south of La 70), 57 (southeast of Oxy 9 well pad)

- Managing water produced from passive vent wells in bayou

- Re-setting screen for passive vent well at bubble site 5 (near Bayou Corne/Grand Bayou intersection)

- Monitoring flow rate and water production from passive vent wells

Containment/ Roads/ Sinkhole/Survey

- Conducting daily berm inspections

- Replacing data cards on seismic monitoring equipment

- Installing passive vent well near bubble site 47 (north west of containment berm)

11:20 a.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Tuesday, July 22 work-

Sinkhole Activity Code 2 – indicating work is not allowed on sinkhole and within containment berms. Seismic monitoring indicates increase in levels of subsurface activity near sinkhole/Oxy 3.

  

Air Monitoring/Sub-slab Sampling and Ventilation

- Conducting ventilation system inspections

 

ORW/CPT Wells

- Continuing pumping on ORWs 4 (northwest of containment berm), 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm), 54 (west of Bayou Corne, south of La 70), 57 (southeast of Oxy 9 well pad)

 

Containment/ Roads/ Sinkhole/Survey

- Conducting daily berm inspections

- Conducting water sampling at sinkhole inflows

- Measuring and recording aquifer monitoring well levels

- Installing permanent wellheads for passive vent wells near bubble site 26 (pond next to Oxy 2 well pad)

- Beginning installation of passive vent well at bubble site 9 (canal southwest of Bayou Corne)

- Continuing sinkhole survey

1:00 p.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity
Thursday, July 17 work-
Sinkhole Activity Code 1 – indicating work is allowed on sinkhole and within containment berms. Seismic monitoring indicates low levels of subsurface activity near sinkhole/Oxy 3.

Air Monitoring/Sub-slab Sampling and Ventilation
– Conducting ventilation system inspections

ORW/CPT Wells
– Continuing pumping on ORWs 4 (northwest of containment berm), 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm), 54 (west of Bayou Corne, south of La 70), 57 (southeast of Oxy 9 well pad)
– Installing sampling pump for ORWs 39 and 40 (north of containment berm) – testing produced water for salinity, conductivity, dissolved solids
– Completing piping connections to divert gas flow from flare 4 to flare 3, shutting in flare 4
– Conducting maintenance on newly installed air monitor station

Containment/ Roads/ Sinkhole/Survey
– Conducting daily berm inspections
– Examining bubble sites to determine candidate for initial installation of gas cap equipment
– Conducting water sampling of aquifer monitoring wells, sinkhole and surface water
– Conducting sinkhole depth/profile survey