Evaluation of Heat and Carbon Monoxide Exposures to Border Protection Officers at Ports of Entry [open pdf - 4MB]
From the Introduction: "On April 22, 2005, NIOSH [National Institute for Occupational Safety and Health] received a request from the American Federation of Government Employees for an HHE [Health Hazard Evaluation] at the CBP [Customs and Border Protection] ports of entry in El Paso, Texas. The HHE request asked NIOSH to evaluate heat stress and CO [carbon monoxide] exposures for CBP officers working in the outdoor vehicle inspection areas. The request indicated that some CBP officers had experienced heat cramps and heat exhaustion. In response, NIOSH investigators monitored heat strain, heat stress, CO in air, and COHb [carboxyhemoglobin] on August 29-September 2, 2005, at the Bridge of the Americas and Paso del Norte ports of entry."
Health Hazard Evaluation Report HETA 2005-0215-3099
Centers for Disease Control and Prevention: https://www.cdc.gov/