BACKGROUND Development of noise-induced hearing loss is reliant on a few factors such as frequency, intensity, and duration of noise exposure. The occurrence of this occupational malady has doubled from 120 million to 250 million in a decade. Countries such as Malaysia, India, and the US have adopted 90 dBA as the permissible exposure limit. According to the US Occupational Safety and Health Ad...

Use of Electrostatic Detection Apparatus in evaluating documents for hidden indentations creates ozone. Ozone can cause respiratory irritation and breathing difficulty. Ozone discharge was measured for an hour during continuous operation at two different locations. Results indicated that continuos use can generate ozone concentrations that will exceed the permissible exposure limit mandated by ...

A continuous-wave, mid-infrared, distributed feedback , interband cascade laser was used to detect and quantify formaldehyde (H 2 CO) using off-axis, integrated cavity output spectroscopy in gas mixtures containing ≈ 1–25 parts in 10 6 by volume (ppmV) of H 2 CO. Analysis of the spectral measurements indicates that a H 2 CO concentration of 150 parts in 10 9 by volume (ppbV) would produce a spe...

BACKGROUND This study aimed to develop an index that can rank welding workplace that associate well with possible health risk of welders. METHODS Welding Fumes Health Index (WFHI) were developed based on data from case studies conducted in Plant 1 and Plant 2. Personal sampling of welding fumes to assess the concentration of metal constituents along with series of lung function tests was cond...

Exposure to cotton (Gossypium hirsutum L.) dust can result in acute pulmonary inflammation marked by elevation of neutrophils in nasal and bronchoalveolar lavage fluids and activation of alveolar macrophages. Such exposure may also result in chest tightness and airway constriction. For this reason, OSHA has established a PEL of 0.2 mg/m for yarn manufacturing and cotton washing. This PEL is for...

Noise is one of the most pervasive health hazards in mining. A compilation of Mine Safety and Health Administration (MSHA) noise survey data for Fiscal year 1990 shows that approximately 40% of the total samples taken for longwall occupations exceeded the Permissible Exposure Limit (PEL) of 100% [Gigliotti et al. 1991]. In order to properly determine workers’ exposures on longwall coal mining s...

An industrial hygiene study was performed monitoring levels of phosphine gas workers are exposed to when applying aluminum phosphide tablets to rodent burrows. Clothing and gloves were monitored for phosphine gas from residual dust. Air in the breathing zone was monitored with short and long term monitoring equipment. No levels of phosphine exceeding the legal permissible exposure limits (PEL) ...

Noise-induced hearing loss is the most prevalent occupational injury in the United States despite the adoption of clear permissible exposure limits and protocols for hearing conservation. This study identifies low-level chemical asphyxiant exposure as a risk factor capable of potentiating noise-induced hearing loss. Rats were exposed to 10, 30, and 50 ppm hydrogen cyanide (HCN) alone for 3.5 h ...