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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 200784957 - Hydrogen Sulfide Gas Kills One And Poisons Six Workers

Accident: 200784957 -- Report ID: 0626300 -- Event Date: 01/09/2010
InspectionOpen DateSICEstablishment Name
31212639401/10/20101311Enbridge G & P (East Texas) Lp
On January 9, 2010, at least four Employees of Enbridge G & P (East Texas) working under the supervision of the plant manager were involved in relighting a waste heat boiler/reaction furnace. The process to restart the waste heat boiler/reaction furnace required the employees to stand close the sight glass valve, remove the sight glass, slide the igniter into the valve, open valve, slide igniter into the burner, ignite, pull igniter partially out, close valve and replace sight glass. However, it was discovered that the sight glass valve had seized and needed to be replaced. Without completing a safe work permit, locking and tagging out the system, or purging it of any toxic or flammable substances, the employees began replacing the valve when the hydrogen sulfide release occurred. Employee #1 died from hydrogen sulfide poisoning, Employee #2 was hospitalized from hydrogen sulfide poisoning, and Employees #3, 4, 5, 6, and 7 suffered symptoms of hydrogen sulfide poisoning but did not require hospitalization.
Keywords: hydrogen sulfide, gas, lockout, gas leak, poisoning
Employee # Inspection Age Sex Degree Nature Occupation
1 312126394 Non Hospitalized injury Poisoning(Systemic) Miscellaneous plant and system operators
2 312126394 Hospitalized injury Poisoning(Systemic) Miscellaneous plant and system operators
3 312126394 Non Hospitalized injury Poisoning(Systemic) Miscellaneous plant and system operators
4 312126394 Non Hospitalized injury Poisoning(Systemic) Occupation not reported
5 312126394 Non Hospitalized injury Poisoning(Systemic) Machinery maintenance occupations
6 312126394 Fatality Poisoning(Systemic) Miscellaneous plant and system operators
7 312126394 Non Hospitalized injury Poisoning(Systemic) Machinery maintenance occupations

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