Evaluating engineering controls during asphalt paving using a portable tracer gas method.
Mickelsen-RL; Mead-KR; Shulman-SA; Brumagin-TE
Am J Ind Med 1999 Sep; 36(S1):77-79
The tracer gas method was shown to be a very versatile technique for evaluating the effectiveness of paving machine ventilation systems under controlled conditions as well as under very difficult environmental conditions. Tracer gas results could be obtained quickly, allowing prompt feedback on the control's performance. In comparison, PAC samples, which were analyzed in a laboratory, took three weeks to process. Care must be taken to distribute the tracer gas in a way that the gas will act as a surrogate for the containment of interest. Even though there appears to be a bias in the tracer gas results, the relative results of this technique can be used to find deficiencies and guide in the optimization of control designs of paving machines.
Work-environment; Asphalt-cements; Asphalt-fumes; Sampling; Sampling-methods; Control-technology; Engineering; Hot-environments; Pulmonary-system-disorders; Asphalt-industry
American Journal of Industrial Medicine