5:20 p.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity
Wednesday, Dec. 18 work-
Sinkhole Activity Code 2 – indicating no work is allowed directly on sinkhole. Seismic monitoring indicates sustained increase in levels of subsurface activity near sinkhole/Oxy 3 – state and parish will continue to closely observe seismic activity to advise of any sudden changes.

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

– Removing water from ORWs 1, 2, 32 (north of La 70, west of Texas Brine facility), 18 (west of containment berm) and 39 (north of containment berm)
– De-pressurizing ORW 54 (north of La 70, west of Texas Brine facility) to change out wellhead

Containment Berm/Roads/Sinkhole
– Surveying containment berm settlement plates
– Surveying south containment berm
– Continuing hydraulic head tests of aquifer monitoring wells
– Sampling sinkhole inflow water
– Recording sinkhole water levels