カリフォルニア州のレクリエーションエリアにあるクリスオチルアスベスト
まとめ
カリフォルニアのレクリエーション用塵の落下.
科学分野:
- 環境科学 環境科学
- 地質学 地質学 地質学
- 職業衛生は,健康に関するものです.
背景:
- サーペンチナイトの地質学的な形成は,自然にアスベストを含んでいる可能性があります.
- 自然埋蔵地でのレクリエーション活動は,被曝につながる可能性があります.
- クリソチルアスベストは,健康に有害であることが知られている.
研究 の 目的:
- 天然の塵から生じるアスベストの露出レベルを定量化するために.
- クリア・クリーク地区のレクリエーション利用者の健康リスクの評価.
- 曝露レベルを職業基準と比較する.
主な方法:
- レクリエーション用道路とトレイルに沿って収集された塵のサンプル.
- トレールのバイクに乗っている人によって使用される個人用空気サンプラーです.
- 空気中の繊維濃度は,職業監視方法を用いて分析された.
主要な成果:
- 落下した塵のサンプルは,90%以上のクリスオチルアスベストでした.
- 空気中の繊維濃度は0.3〜5.3繊維/mLであった.
- 平均総粉塵濃度は約20mg/m3で,その90%がクリスオチルでした.
結論:
- 重要なアスベスト暴露は,レクリエーション中の天然のサーペンチナイト堆積物から発生します.
- 測定された被曝レベルは,提案された職業基準に近づくか,それを上回る.
- これは,干渉されていない天然堆積物からの高強度アスベスト暴露に関する最初の報告です.
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