Occupational lead exposure in Finland. VI. Final report

Area of Science:

• Occupational Health
• Environmental Health
• Toxicology

Background:

• Lead exposure poses significant health risks to workers.
• Previous methods for identifying hazardous work environments may be insufficient.
• Understanding lead exposure levels across diverse industries is crucial for worker safety.

Purpose of the Study:

• To assess lead exposure levels in 30 different types of work in Finland.
• To evaluate the effectiveness of the national poisoning register in identifying lead exposure hazards.
• To identify types of work with unrecognized lead exposure risks.

Main Methods:

• A survey of 2,209 workers from 1970-1973.
• Measurement of blood lead concentrations (Pb-B) as an indicator of exposure.
• Analysis using rank order correlation statistics to compare survey data with poisoning register information.

Main Results:

• Exceeded recommended blood lead levels (70 mug/100 ml) in PVC plastic manufacturing, storage tank manufacturing/repairing, machine shop work, metal surface treatment, paint manufacturing, car radiator repairing, spray painting, and battery repair.
• Highest average exposures in lead scrap smelting (median 79 mug/100 ml), battery manufacturing (median 66 mug/100 ml), and metal founding (median 53 mug/100 ml).
• National poisoning register effectively identified highly exposed work types but missed others like metal founding and car radiator repair.

Conclusions:

• The national poisoning register is a valuable tool for identifying high-risk lead exposure occupations.
• Systematic surveys and regular monitoring are essential to detect lead exposure in less recognized or lower-level hazardous work.
• Proactive identification and monitoring are necessary to prevent lead poisoning and its adverse health effects in all exposed workers.