Bayou Corne/Grand Bayou Response Activity
Wednesday, Sep. 4 work-
Sinkhole Activity Code 3 – highest level – Seismic monitoring detected elevated fluid/gas movement signals over past day, and an isolated seismic event was observed shortly after noon today, comparatively stronger than most recent signals, but no follow-on increase in activity or surface impact has been observed as of mid-afternoon. Investigation is ongoing as to the source of that event and its potential impact. In the meantime, work within berms/directly on sinkhole continues to be suspended as a precaution while new safety protocols are finalized.
Sub-slab Sampling and Ventilation
– Continuing ambient and in-stack gas monitoring on sub-slab ventilation systems
– Vapor monitoring at 134 Sportsman and 116 Crawfish Stew
– Vapor monitoring at 10 locations where vent systems are located
– Pressure monitoring at 116 and 174 Crawfish Stew, 1438 Sauce Piquante
ORW/CPT Wells
– Perforating ORWs 3 and 46 (east of Bayou Corne, south of La. 70)
– Removing meter connections for ORWs 5 and 8 (western containment berm)
– Completing shallow aquifer monitoring well MRAA 4S (north of containment berm)
– Testing dual-phase vacuum extraction system for removal of gas from shallow sands
Containment Berm/Roads/Sinkhole
– Work on/within containment berms suspended pending approval of revised safety protocol
