The site is SW of San Antonio near Macdona, Bexar County, Texas. Weather remains sunny, hot and humid. Wind is from the SE at 6.3 miles per hour. There is a 20% chance of rainfall throughout the night, with a forty percent chance of rain is predicted for tomorrow.
Water trucks are being utilized to minimize site dust.
Chlorine offload continues into frac tanks. Tanker loads of sodium hypochlorite are leaving the site to be processed by Oxy.
Frac Tank F1 was offloaded to the portable polyvinyl storage tanks last night.
A proprietary tank caulk provided by Oxy was applied to the patch last night which allowed minimal pressure to be applied to the tank car. This is expected to increase the production rate.
Union Pacific (UP) reports that the chlorine level in the tank was observed to be 12 inches at 0800, dropping to 10 inches by 1730.
Salamander heaters are still being used on the head of the tank car to promote chlorine vaporization.
UP removed a 6' x 10' section of the outer hull of the tank, exposing a section of the inner hull to increase solar heating.
Site salvage operations continue.
TCEQ and START continue to monitor site activities and evaluate site environmental recovery activities.
Continuous air monitoring by START and CTEH remains in place.
TCEQ is continuing coordination of removal of contaminated material.
Five residences remain evacuated. Two of those are locked and cannot be entered by clearance teams. The occupants remain hospitalized from chlorine exposure.
Chlorine offload continues. The operation may take several more days, based on the decreased rate of vapor production.
UP plans to continue to remove sections of the outer hull to further increase solar heating of the tank.
UP plans to empty the tank of all chlorine, air sparge for several hours, and rinse with a caustic solution. Then they will cut up the tank on-site and begin analysis of stuctural failure due to impact.
Rattlesnakes remain a threat.
Continue air monitoring.
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