The plant, about 30 miles southeast of Houston, makes products like alcohol resins and a popular insecticide called Lannate.
In the past five years, the TCEQ has cited it at least two dozen times for violating state law. The plant has failed to perform routine safety inspections, keep equipment in proper working order and prevent unauthorized pollution leaks, according to violation notices issued by the agency. In a few instances, the agency demanded fines of a few thousand dollars from DuPont for more serious lapses.
But the unauthorized leaks of toxic chemicals are common in Texas. Thousands — and even millions — of pounds of toxic chemicals beyond what permits allow have spewed from the state's facilities, as The Texas Tribune has reported. Though many of those events were close calls that prompted evacuations at worst, some triggered deadly explosions that, in turn, caused even more gas to be released.
Since 2009, Texas chemical manufacturers have reported at least 19 other unauthorized releases of methyl mercaptan, according to state data. DuPont’s was the only methyl mercaptan release that killed or injured workers during that period.

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