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

Bayou Corne/Grand Bayou Response Activity

Tuesday, Sep. 17 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

– Building enclosures for ventilation systems at 1465 Sauce Piquante and 174 Crawfish Stew

– Dewatering ports at all installed ventilation systems

– Retrofitting new profile blowers at 1465 Sauce Piquante

ORW/CPT Wells

– Installing containment around compressors for drawdown test of ORWs

– Installing high-capacity pump on ORW 9 (west of containment berm)

– Installing CPT 117 (south of La. 70, east of Texas Brine facility)

– Identifying areas for proposed DPVE wells in Bayou Corne community

Containment Berm/Roads/Sinkhole

– Completing construction of new northwest access road and pad

– Continuing excavation for overflow structure on western containment berm

– Placing gravel on east berm build-out to be used for drawdown tank for OGRW 1

– Determining sites for sinkhole profile and sampling areas