4:40 p.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Wednesday, Feb. 19 work-

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

Air Monitoring/Sub-slab Sampling and Ventilation

– Conducting ventilation system inspections

ORW/CPT Wells

– Preparing ORW 21 (north of Sauce Piquante, west of Crawfish Stew) to begin pump test

– Surveying settlement rods for ORW 21 and 38 (north of Sauce Piquante)

– Evaluating ORW-39 (north of containment berm) for de-watering pump test

– Laying out de-watering piping along ORWs south of La 70 for future dewatering

Containment Berm/Roads/Sinkhole

– Continuing placing sand on new south containment berm route

– Initial staking of settlement plate locations on new south containment berm route

– Surveying original south containment berm

– Sampling sinkhole water