news of the week JANUARY 24, 201 1 EDITED BY WILLIAM G. SCHULZ & KIMBERLY R. TWAMBLY
INVESTIGATION: Rush to production
caused plant explosion in West Virginia, safety board concludes
DECISION TO HASTEN the restart of a pesticide production process and bypass safety controls led to a tragic accident on Aug. 28, 2008, at the Bayer CropScience plant in Institute, W.Va., concludes the Chemical Safety & Hazard Investigation Board (CSB), in a report released on Jan. 20. The accident destroyed a key pesticide manufacturing unit, killed two workers, required 40,000 people living near the plant to shelter in place, and revealed gross inadequacies in Bayer’s accident emergency response operations. Workers at the Bayer plant were under pressure to resume production of the pesticides methomyl and Larvin after a lengthy maintenance shutdown, according to the CSB investigation. As a result, they failed to evaluate new computer programs, inspect safety equipment, and conduct safety process checks. Most critical, the report says, was the intentional overriding of an interlock system that was designed to prevent a runaway reaction inside a residue treater pressure vessel. Late at night, the vessel overpressurized and exploded in a fireball, sending vessel pieces flying. Fortunately, the debris missed a nearby aboveground tank storing 13,000 lb of methyl isocyanate (MIC), which is an intermediate in pesticide manufacturing and is the chemical that caused the deaths of thousands of people in Bhopal, India, in 1984. The resulting fire from the Bayer explosion burned for four hours while company officials kept local residents in the dark about the accident, even blocking the state fire marshal from entering the plant. Local emergency responders called for residents to shelter in place without input from plant officials, who had recommended the same action but did not make their views public (C&EN, May 11, 2009, page 25). In the months that followed, Bayer officials repeatedly stated that no toxic material had been released during the accident. They blocked CSB from making portions of its investigation public and claimed that the data were “sensitive security information” and therefore protected under federal provisions to thwart
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terrorists. Eventually, Congress and the Department of Homeland Security intervened, and Bayer’s security claim was found to be invalid. During its investigation, the safety board determined that plant air monitors that could have detected the release of toxic chemicals were not working at the time of the accident. And according to the CSB report, no reliable data or analytical methods were available to determine which chemicals were released or to predict exposure concentrations. The board’s report makes a host of recommendations to the company, the state, EPA, and OSHA, but CSB Chairman Rafael Moure-Eraso highlighted his view that West Virginia should create a locally run hazCSB
BAYER ACCUSED OF SKIRTING SAFETY
ardous chemical release prevention program, modeled on a chemical plant oversight program in California’s Contra Costa County. “Local jurisdictions can put together highly effective and targeted inspection and enforcement programs, funded by levies on the plants themselves,” he continued. “The accident rate in Contra Costa County has dropped dramatically, and last year in fact they had no significant accidents, thanks to this program.” Since the West Virginia accident, Bayer has decided to gradually end all production, use, and storage of MIC by next year (C&EN, Jan. 17, page 24). Maya Nye, head of a community organization in West Virginia created after the Bhopal accident, applauds Bayer’s decision. She also backs the new plant oversight program proposed by CSB and urges a shift to inherently safer technologies by the 48 chemical plants near Institute.—JEFF JOHNSON
WWW.CEN-ONLINE.ORG
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JANUARY 24, 20 1 1
The 2008 explosion at a Bayer CropScience plant in Institute, W.Va., caused extensive damage and two fatalities.
