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

Bayou Corne/Grand Bayou Response Activity
Tuesday, Dec. 3 work-
Sinkhole Activity Code 1 – indicating work is allowed on sinkhole and containment berm, seismic monitoring indicates low levels of sub-surface activity near sinkhole/Oxy 3

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

– Installing permanent wellheads on ORWs 52 and 52 (west of Bayou Corne, south of La 70)
– Drilling and installing passive vent well NSDBS 56 (near bubble site 56 on Bayou Corne, north of La 70)
– Removing water from ORW 10 (west of containment berm) to increase gas flow
– Advancing and completing CPT-122WR (in Bayou Corne, south of Sportsman’s Landing)
– Measuring water levels on aquifer wells
– Sampling industrial water wells

Containment Berm/Roads/Sinkhole
– Surveying containment berm settlement plates
– Transferring water from swamp to sinkhole
– Continuing south containment berm repairs, placing clay over grouted areas
– Collecting weekly containment outfall samples