与钻井泥添加剂的使用和处理相关的石棉暴露
Evan Anderson1, Michael Holton1, Jennifer Ellis1
1Ramboll, Princeton, NJ, USA.
Toxicology and industrial health
|May 6, 2024
概括
这项研究分析了石油和天然气钻井操作中的历史石棉暴露数据. 测量到的空气中的青含量低于OSHA限制,填补了钻井液添加剂的关键数据缺口.
科学领域:
- 职业健康 职业健康 职业健康
- 环境科学 环境科学
- 工业卫生 工业卫生
背景情况:
- 青在历史上被用作石油和天然气勘探的钻井液中的添加剂.
- 在处理这些钻井液添加剂期间接触石棉的数据有限.
- 了解历史暴露水平对于评估职业风险至关重要.
研究的目的:
- 总结从钻井液添加剂中使用的青石棉的历史石棉暴露数据.
- 在石油和天然气勘探中的石棉处理活动中评估空气中纤维度.
- 将历史暴露数据与已建立的职业安全和健康管理局 (OSHA) 允许的暴露限值 (PEL) 进行比较.
主要方法:
- 分析了1972年至1985年期间收集的1171个工业卫生 (IH) 个人和区域空气样本.
- 使用相对比显微镜 (PCM) 来测量空气中纤维度.
- 从短期和长期空气样本计算的8小时时间加权平均值 (8小时TWA).
主要成果:
- 在处理石棉时,空气中的平均纤维度从0.62 f/cc到3.39 f/cc不等.
- 在1097个短期样本中,超过80%的时间不到30分钟.
- 计算的8小时TWA结果没有超过同期的OSHA PEL.
结论:
- 过去在钻井液添加剂中接触化石棉的情况并不超过OSHA PELs.
- 这项分析解决了石油和天然气行业对石棉暴露的重大数据缺口.
- 这些发现有助于理解与历史使用石棉相关的职业风险.
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