3:40 p.m. Update from the Office of Conservation

Bayou Corne/Grand Bayou Response Activity

Thursday, Sep. 19 work-

Sinkhole Activity Code 1 – lowest level – no detection of significant elevation of seismic activity in area of sinkhole/Oxy 3 cavern

Sub-slab Sampling and Ventilation

– Continuing 24-hr pressure test

– Continue building enclosures around ventilation systems

– Dewatering ports at all installed ventilation systems

– Coordinating with parish for inspection of reinstalled blowers

ORW/CPT Wells

– Delivering tanks for use in drawdown tests of OGRW 1 (Oxy 2 well pad) and ORW 9 (west of containment berm)

– Relocating tank to continue drawdown test of OGRW 1 (Oxy 2 well pad)

– Connecting ORW 9 (west of containment berm) piping to tank for drawdown test

– Installing CPT 79 (south of 70, near west bank of Grand Bayou)

– Installing MIHPTs 78 and 80 (east of Oxy 2 well pad)

Containment Berm/Roads/Sinkhole

– Continuing placement of concrete mats for overflow structure on western containment berm

– Continuing sinkhole profile and sampling