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

Bayou Corne/Grand Bayou Response Activity

Thursday, Dec. 5 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

ORW/CPT Wells

– Purging ORWs 49 and 50, and pressure monitoring well PMW 18S (Sportsman’s Landing)

– Completing 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

– Surveying settlement plate near DPVE 47 test site (west of containment berm)

– Logging Oxy 3A (working from Oxy 9 well pad)

Containment Berm/Roads/Sinkhole

– Surveying containment berm settlement plates

– Installing new water level monitoring instrumentation

– Transferring water from swamp to sinkhole

– Monthly sampling of aquifer wells