4:30 p.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Wednesday, Sep. 25 work-

Sinkhole Activity Code 2 – elevated – increase in number of Very Long Profile seismic activity, generally associated with movement of gas/fluid below sinkhole, in area of sinkhole/Oxy 3 cavern – requires halting all work directly on sinkhole

Sub-slab Sampling and Ventilation

– Continuing construction of enclosures for ventilation units 

ORW/CPT Wells

– Monitoring pump drawdown tests of OGRW 1 (Oxy 2 well pad) and ORW 9 (west of containment berm)

– Re-installing wellhead on ORW 30 (off northwest corner of containment berm) and connecting to flare

– Removing water from ORW 31 (off northwest corner of containment berm)

– Beginning rework of ORWs 28 and 29 (north of La. 70, west of Texas Brine facility)

– Installing MIHPTs 5 and 6 (west of containment berm)

– Connecting DPVE 47 to tank (access road west of containment berm)

– Installing lines and flow meters from DPVE/ORW water tanks for discharge into sinkhole

– Sampling all aquifer monitoring wells

Containment Berm/Roads/Sinkhole

– Placing gravel for access to ORW wells (west of Bayou Corne)

– Excavating trenches for placement of lines from DPVE/ORW water tanks for discharge into sinkhole

– Inspecting settlement plates and subsidence on containment berms