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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 170197164 - Employees Exposed To Chemical Fumes When Relief Valve Fails

Accident: 170197164 -- Report ID: 0950622 -- Event Date: 05/05/1991
InspectionOpen DateSICEstablishment Name
11175062605/06/19911799Aspen
InspectionOpen DateSICEstablishment Name
11175056805/03/19912875Dow Chemical
InspectionOpen DateSICEstablishment Name
11175052705/06/19911799Performance Mechanical, Inc.(Pmi)
InspectionOpen DateSICEstablishment Name
11175053505/06/19912812Dow Chemical
Employees #1 and #2, hired by one of the subcontractors on the PSA project at Dow Chemical, were working in the Sym-Tet chlorine plant. They were approximately 50 ft from the T-104 tank, which held carbon tetrachloride, hydrochloric acid, and chlorine. The T-104 tank was pressurized over the 75 lb limit of the PSV valve, which was designed to discharge into the work area. Employees #1 and #2 were exposed to carbon tetrachloride and chlorine. The chlorine exposure caused serious injuries, and the exposure to carbon tetrachloride was acute without any chronic effects. Dow Chemical was cited for inappropriate design and an inadequate alarm system. The subcontractors were cited for allowing employees to work around the PSV valve without respirators.
Keywords: chlorine, toxic fumes, safety relief valve, pressure release, work rules, inhalation, respirator, construction, high pressure, chemical vapor
Employee # Inspection Age Sex Degree Nature Occupation
1 111750626 Hospitalized injury Other Occupation not reported
2 111750568 Occupation Not Listed
3 111750527 Hospitalized injury Other Occupation not reported
4 111750535 Occupation Not Listed

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