Entergy Texas says it is thoroughly investigating what caused a short circuit event at its substation on 39th Street in Port Arthur on Sunday.
Nearly 18,000 customers lost power, including six refineries and plants that were forced to flare.
Initial reports released to TCEQ show the amounts of carbon monoxide, sulfur dioxide, benzene and other toxins released. The TCEQ says it won't know if there were any limit violations until final reports are submitted in two weeks.
Huntsman Port Neches, Valero Port Arthur, Motiva, Dupont Beaumont Plant, Total Petrochemicals and Flint Hills Resources were all forced to go into shut down mode Sunday.
Motiva says it released over 20,000 pounds of carbon monoxide and over 2.5 million pounds of volatile organic compounds.
Valero reported releasing 70,000 pounds of sulfur dioxide in one flare. Flint Hills reports releasing 11,000 pounds of carbon monoxide. Huntsman is showing a release of 10-20 pounds of ethylene oxide. Total reports releasing 2,000 pounds of sulfur dioxide and Dupont releasing over 3,700 pounds of carbon monoxide.
A final report is due in two weeks.
TCEQ says "The final report has a list of all air contaminants known to have been released during the event and will be reviewed for compliance with their respective permitted emission limits."
Meanwhile, Entergy Texas says it is working with refineries as it determines the cause of the outage.
"We want them to know what we're doing. We want to know what occurred at the plants. That will all figure into the investigation to help us determine what caused this widespread outage. Until we know what happened, we can't determine whether there is something we could have done to prevent it," says Debi Derrick with Entergy.
Motiva tells 12News it's in the early process of preparing units for safe restart that will take several days.
Valero tells 12News all units are in operation with the exception of one of the two crude units and one of the two hydro cracker units. They are both continuing the restart process.
For the complete list of initial emission reports submitted, click on the link below: