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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 97526.015 - Three Employees Are Asphyxiated By Hydrogen Sulfide Gas

Accident: 97526.015 -- Report ID: 0936300 -- Event Date: 07/07/2017
InspectionOpen DateSICEstablishment Name
1246546.01507/08/2017Usa Fanter Corp., Ltd.
At 11:00 a.m. on July 7, 2017, Employee #1was attempting to dislodge a 24 inch r ubber plug from a 2foot diameter sewer pipe located inside a 24foot deep wet wel l. The workers were outside the well pulling on a 1/4-inch nylon rope that was a ttached to the 24-inch diameter plug. The plug was lodged inside a T-shaped PVC fitting from the force of the waste water emptying into the well. Without con ducting any atmospheric testing of the work space, Employee #1 climbed down the ladder with a crowbar to dislodge the deflated 24inch diameter rubber plug, whic h was about 8 feet below the top of the well. He had difficulty releasing the plug with the crowbar and started to make his way up the ladder. He lost consc iousness when he was about 2 feet from the top of the well and fell into the 24 foot deep well. Employee #2 descended down the ladder to provide emergency resc ue, but lost consciousness and went underwater. The waste water level was abou t 3 feet deep at this point. Employee #3 climbed down the ladder to provide em ergency rescue, but lost consciousness as well. All three workers were asphyxi ated by hydrogen sulfide (H2S) gas.
Keywords: asphyxiated, confined space, hydrogen sulfide
End Use Proj Type Proj Cost Stories NonBldgHt Fatality
Sewer/water treatment plant Alteration or rehabilitation $250,000 to $500,000 X
Employee # Inspection Age Sex Degree Nature Occupation
1 1246546.015 41 M Fatality Construction laborers
2 1246546.015 47 M Fatality Construction Laborer
3 1246546.015 52 M Fatality Construction laborers

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