Hazard Evaluation and Environmental Safety Assessment in Welding Operations at Manufacturing Facilities
Overview
This paper presents a hazard evaluation report for a manufacturing company's welding operations, assessing employee exposure to welding fumes and iron oxide. The study evaluates air sampling data from six welding booths against OSHA permissible exposure limits and analyzes the effectiveness of local exhaust ventilation systems in controlling workplace hazards.
What this case study covers
- Introduction and objectives of the hazard evaluation study
- Air sampling methodology and time-weighted average exposure calculations for six welding booths
- Analysis of iron oxide fume exposure levels against OSHA standards and identification of overexposure in booth 5
- Evaluation of local exhaust ventilation systems and hood airflow velocities
Preview
OSH- 4308-Advanced Concepts in Environmental Safety
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Advanced Concepts in Environmental Safety
The study was conducted to obtain a hazard evaluation report for different parts of the company where employees were exposed to welding fumes and other hazardous substances. The assessment will serve a prompt for reviewing major safety procedures and processes. One of the primary objectives is to determine whether or not sufficient compliance and safety levels are being maintained, identify the areas that need improving, and develop an action plan to address them.
Acme Manufacturing’s welding room houses six welding booths. TWA (time-weighted average) exposure is the average concentration of substances during an ordinary the eight- to the ten-hour workday. Several have recommended short-period exposure limits intended to complement the TWA where there are identified toxic effects from high exposures. OSHA’s legal permissible exposure limit for iron oxide fume is 10 mg/m3 averaged for an 8-hour work shift.
According to OSHA's asbestos requirements and standards for air sampling to evaluate exposures against the PRLs, sampling time ought to be as close to the possible work shift, not exceeding 8 hours. Also, a minimum of six hours of sampling is required for the samples to be valid.