Accident Report Detail

Accident Summary Nr: 14479877 - Employee loses consciousness in manhole

Accident Summary Nr: 14479877 -- Report ID: 0352450 -- Event Date: 02/07/1994
Inspection Nr	Date Opened	SIC	NAICS	Establishment Name
119587780	02/07/1994	4939	0	Howard County Department Of Public Works

Abstract: Employee #1, a utility worker, went inside a 21 ft deep manhole to install a sewer house connection and immediately lost consciousness. He was wearing a harness and when he was pulled to safety by stand-by personnel he immediately regained consciousness. Prior to his entry, measurements for the treatment of oxygen, hydrogen sulfide, and percent LEL in the sewer had been taken. The oxygen level was determined to be 20.3 percent. The alarms on the Industrial Scientific HMX 271 hydrogen sulfide, combustible gas, and oxygen monitor did not sound. Subsequent medical evaluation implicated no specific contaminant.

Keywords: UNCONSCIOUSNESS, CONFINED SPACE, MANHOLE

Employee Details
Employee #	Inspection Nr	Age	Sex	Degree of Injury	Nature of Injury	Occupation
1	119587780			Non Hospitalized injury	Asphyxia	Occupation not reported

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