Gwin Kristin K, Wallingford Kenneth M, Morata Thais C, Van Campen Luann E, Dallaire Jacques, Alvarez Frank J
Hazard Evaluations and Technical Assistance Branch, Division of Surveillance, Hazard Evaluations and Field Studies, National Institute for Occupational Safety and Health, Cincinnati, Ohio, USA.
J Occup Environ Hyg. 2005 Aug;2(8):406-13. doi: 10.1080/15459620500203798.
The National Institute for Occupational Safety and Health (NIOSH) conducted a series of surveys to evaluate occupational exposure to noise and potentially ototoxic chemical agents among members of a professional stock car racing team. Exposure assessments included site visits to the team's race shop and a worst-case scenario racetrack. During site visits to the race team's shop, area samples were collected to measure exposures to potentially ototoxic chemicals, including, organic compounds (typical of solvents), metals, and carbon monoxide (CO). Exposures to these chemicals were all below their corresponding Occupational Safety and Health Administration (OSHA) permissible exposure limits (PELs), NIOSH recommended exposure limits (RELs), and American Conference of Governmental Industrial Hygienists (ACGIH) threshold limit values (TLVs). During site visits to the racetrack, area and personal samples were collected for organic compounds, lead, and CO in and around the "pit" area where the cars undergo race preparation and service during the race. Exposures to organic compounds and lead were either nondetectable or too low to quantify. Twenty-five percent of the CO time-weighted average concentrations exceeded the OSHA PEL, NIOSH REL, and ACGIH TLV after being adjusted for a 10-hour workday. Peak CO measurements exceeded the NIOSH recommended ceiling limit of 200 ppm. Based on these data, exposures to potentially ototoxic chemicals are probably not high enough to produce an adverse effect greater than that produced by the high sound pressure levels alone. However, carbon monoxide levels occasionally exceeded all evaluation criteria at the racetrack.
美国国家职业安全与健康研究所（NIOSH）开展了一系列调查，以评估一支职业纳斯卡赛车车队成员的职业性噪声暴露以及潜在的耳毒性化学物质暴露情况。暴露评估包括对车队维修店和一个最坏情况赛道的实地考察。在对赛车维修店进行实地考察期间，采集了区域样本，以测量潜在耳毒性化学物质的暴露情况，包括有机化合物（典型的溶剂）、金属和一氧化碳（CO）。这些化学物质的暴露水平均低于相应的美国职业安全与健康管理局（OSHA）允许暴露限值（PEL）、NIOSH推荐暴露限值（REL）以及美国政府工业卫生学家会议（ACGIH）阈限值（TLV）。在对赛道进行实地考察期间，在赛车比赛期间进行准备和维修的“维修站”区域及其周边，采集了有机化合物、铅和一氧化碳的区域样本和个人样本。有机化合物和铅的暴露要么未检测到，要么低至无法量化。在按照10小时工作日进行调整后，25%的一氧化碳时间加权平均浓度超过了OSHA PEL、NIOSH REL和ACGIH TLV。一氧化碳峰值测量值超过了NIOSH推荐的200 ppm上限。基于这些数据，潜在耳毒性化学物质的暴露可能不足以产生比单独高声压水平更大的不良影响。然而，赛道上的一氧化碳水平偶尔会超过所有评估标准。
