3:50 p.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity
Thursday, May 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) and 54 (west of Bayou Corne, south of La 70)
- Setting up to drill PMW 15
- Installing CPT 139 (north of La 70, east of Gumbo Street)

Containment/ Roads/ Sinkhole/Survey
- Conducting daily berm inspections

9:40 a.m. Update

Message from Texas Brine:

As a result of the recent, heavy rainfall, the abandoned section of the original south berm was overtopped today.  The new south berm was not breached or overtopped at any point.  Even with heavy rains, approximately 3-4’ of freeboard on the new south berm remains and the waters of the sinkhole are contained as they have been since the initial completion of the containment system.

Because of the expected gradual expansion of the sinkhole the decision was made over five months ago to expand the containment system to the south and abandon the section referred to as the “old” south berm.   After initial containment of the new south berm was achieved, Texas Brine ceased maintenance operations on the old south berm.  On January 17th, 2014, Texas Brine contractors added a final layer of material to the berm and no maintenance activity has been performed since.

Following the completion of the new 3,900 linear foot earthen south berm, plans were being drawn up to initiate a cut-through on the old south berm in order to connect the bodies of water between the old south berm and the new south berm.  Not surprisingly, the heavy rains resulted in a natural overtopping, which created a pathway between the two bodies of water inside of the greater containment structure.

Texas Brine continues to monitor surface water and groundwater as we have since August 4th 2012.  With over 3,500 samples taken to date there are no indications of adverse water quality impacts to area surface water outside of the sinkhole containment area.  Plans were already in place to adjust the water sampling locations, within the containment system given the new south berm, prior to today’s overtopping. 

2:25 p.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Tuesday, May 27 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) and 54 (west of Bayou Corne, south of La 70)

- Installing CPT 138

Containment/ Roads/ Sinkhole/Survey

- Conducting daily berm inspections

- Adding limestone to thin areas on new south containment berm

- Pulling old boom and absorbent pads from sinkhole

1:45 p.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Friday, May 23 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 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm) and 54 (west of Bayou Corne, south of La 70)

- Grouting PMW 04 and completing PMW 07

- Installing CPT 140 (north of La 70, east of Gumbo St)

Containment/ Roads/ Sinkhole/Survey

- Conducting daily berm inspections

11:40 a.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Tuesday, May 20 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 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm) and 54 (west of Bayou Corne, south of La 70)

- Placing board mats and mobilizing rig to begin installing PMW-07 (148 Sportsman’s Drive)

Containment/ Roads/ Sinkhole/Survey

- Conducting daily berm inspections

- Plugging LA 15 and LA16 seismic monitoring wells on Texas Brine facility

- Cutting grass on ORW areas west of Bayou Corne, and Texas Brine properties north of La 70 to the east of Bayou Corne

- Sampling sinkhole inflow water

12 noon Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Monday, May 19 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 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm) and 54 (west of Bayou Corne, south of La 70)

- Changing out pump for ORW 4 (northwest of containment berm)

- Performing maintenance on pump for ORW 14 (Oxy 9 well pad)

- Placing board mats and mobilizing rig to begin installing PMW-07 (148 Sportsman’s Drive)

Containment/ Roads/ Sinkhole/Survey

- Conducting daily berm inspections

- Changing out ORW 57 wellhead

- Conducting logging of Oxy 2

- Cutting grass on ORW areas west of Bayou Corne, and Texas Brine properties north of La 70 to the east of Bayou Corne

11:35 a.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Tuesday, May 13 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 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm) and 54 (west of Bayou Corne, south of La 70)

- Conducting workover of ORW 4 (northwest of containment berm)

- Collecting samples from aquifer monitoring wells

- Surveying CPT locations

Containment/ Roads/ Sinkhole/Survey

- Conducting daily berm inspections

- Clearing overgrowth from well and flare locations

- Collecting samples from sinkhole inflow locations

- Cleaning out seismic monitoring station LA 14 (Oxy 9 well pad)

- Re-installing sensor for seismic monitoring station LA 11 (Oxy 10 well pad)

11:45 a.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Monday, May 12 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 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm) and 54 (west of Bayou Corne, south of La 70)

- Placing mats in preparation for installing CPT 127 (148 Sportsman’s Drive)

Containment/ Roads/ Sinkhole/Survey

- Conducting daily berm inspections

- Cleaning out seismic monitoring stations LA 11 (Oxy 10 well pad) and LA 14 (Oxy 9 well pad) and removing sensors 

12:45 p.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Tuesday, May 6 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 14 (Oxy 9 well pad), 15 (north of La 70, east of Gumbo Street), 48 (north of containment berm) and 54 (west of Bayou Corne, south of La 70)

- Pulling pump on ORW 4 (northwest of containment berm) repair/replace

- Installing CPT 129 near ORW 57 (east of Oxy 9 well pad) access road

- Sampling bubble sites

Containment/ Roads/ Sinkhole/Survey

- Installing gates on new south containment berm

- Placing hydro mulch around new south containment berm

- Assembling rig for workover on Oxy 2