Download or read book Silica Exposure to Excavation Workers During the Excavation of a Low Level Radiological Waste Pit and Tritium Disposal Shafts written by and published by . This book was released on 1995 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluated the task-length average (TLA) respirable dust and respirable silica airborne concentrations to which construction workers excavating volcanic tuff at Los Alamos National Laboratory (LANL) were exposed. These workers were excavating a low level radiological waste disposal pit of final dimensions 720 feet long, 132 feet wide and 60 feet deep. The objectives of this study were as follows: (1) evaluate exposures; (2) determine if the type of machinery used affects the respirable dust concentration in the breathing zone of the worker; (3) evaluate the efficacy of wetting the pit to reduce the respirable dust exposure; and (4) determine if exposure increases with increasing depth of pit due to the walls of the pit blocking the cross wind ventilation.

Download or read book Health Effects of Occupational Exposure to Respirable Crystalline Silica written by and published by . This book was released on 2002 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Occupational Exposure to Crystalline Silica written by National Institute for Occupational Safety and Health and published by . This book was released on 1974 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Controlling Silica Exposures in Construction written by U.S. Department of Labor and published by CreateSpace. This book was released on 2014-02-26 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guidance document addresses the control of employee exposures to respirable dust containing crystalline silica, which is known to cause silicosis, a serious lung disease, as well as increase the risk of lung cancer and other systemic diseases. This document provides information on the effectiveness of various engineering control approaches for several kinds of construction operations and equipment, and contains recommendations for work practices and respiratory protection, as appropriate. Quartz is the most common form of crystalline silica. In fact, it is the second most common surface material accounting for almost 12% by volume of the earth's crust. Quartz is present in many materials in the construction industry, such as brick and mortar, concrete, slate, dimensional stone (granite, sandstone), stone aggregate, tile, and sand used for blasting. Other construction materials that contain crystalline silica are asphalt filler, roofing granules, plastic composites, soils, and to a lesser extent, some wallboard joint compounds, paint, plaster, caulking and putty. Cristobalite, a less common form of crystalline silica, is formed at high temperatures (>1,470 C) in nature and by industrial processes. The ceramic and brick lining of boilers and vessels, some ceramic tiles, and volcanic ash contain cristobalite. The recommendations presented in this document are based on a review of information in the published literature, NIOSH In-Depth Survey Reports and OSHA inspection data. Engineering control evaluations reported in the published literature were generally performed in controlled work environments and may not reflect actual workplace exposures experienced at construction worksites. Moreover, potential silica exposure levels will depend on the concentration of silica in materials at construction sites, as well as factors in the work environment (such as enclosed, semi-enclosed, or open spaces and/or multiple operations generating silica dust) as well as environmental conditions (such as wind direction and speed). Therefore, OSHA encourages employers to conduct periodic exposure monitoring to confirm that engineering and work practice controls are effective and that appropriate respiratory protection is being used where necessary. Controls continue to evolve and OSHA encourages equipment suppliers and contractors to work with industrial hygienists to evaluate new designs and products to obtain objective information that can be used to evaluate performance and support informed decisions on use."

Download or read book Crystalline Silica Quartz written by F. Rice and published by . This book was released on 2000 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: A concise assessment of the adverse effects on human health caused by exposure to quartz the most common form of crystalline silica. Quartz is a frequently occurring solid component of most natural mineral dusts. Human exposure occurs most often during occupational activities involving movement of earth disturbance of silica-containing products such as masonry and concrete or use or manufacture of silica-containing products. As respirable quartz dust particles can be inhaled and deposited in the lung the report gives particular attention to evidence of an increased risk of lung cancer in occupationally exposed workers. Most studies in laboratory animals have concentrated on adverse effects associated with long-term inhalation of particles. Effects observed include cellular proliferation nodule formation suppressed immune function and alveolar proteinosis. While exposure clearly induces pulmonary tumours in one species other species show less or no malignant tumour response. The evaluation of risks to human health draws on a large number of epidemiological studies of workers exposed to respirable quartz dust. Occupational exposure has been linked to an increased incidence of silicosis ung cancer and pulmonary tuberculosis. Studies have also documented statistically significant increases in cases of bronchitis emphysema chronic obstructive pulmonary disease autoimmune-related diseases including scleroderma rheumatoid arthritis and systemic lupus erythematosus and renal disease. In reviewing these findings the report underscores several uncertainties inherent to the study of respiratory diseases in occupational populations that complicate the assessment of risks associated with exposure to quartz dust. The need for improved methods of exposure assessment and data analysis is stressed.

Download or read book Occupational Exposure to Silica and Cancer Risk written by L. Simonato and published by Oxford University Press, USA. This book was released on 1989 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides comprehensive, up-to-date information on epidemiological studies on the relationship of silica dust inhalation to incidents of lung cancer. Though such exposures have long been linked to the respiratory disorder silicosis, the danger of cancer has been hard to document due to limited evidence. The present work gathers the most current information available, including efforts to identify groups of workers exposed to silica in the absence of other known carcinogens. It will be of interest to oncologists, occupational health personnel, epidemiologists, and specialists in respiratory disorders.

Download or read book Construction Workers Exposure to Crystalline Silica written by Charles Beaudry and published by . This book was released on 2013 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book OSHA NIOSH Hazard Alert written by and published by . This book was released on 2015 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Occupational Safety and Health Administration (OSHA) and the National Institute for Occupational Safety and Health (NIOSH) have identified exposure to silica as a health hazard to workers involved in manufacturing, finishing and installing natural and manufactured stone countertop products, both in fabrication shops and during in-home finishing/installation. This hazard can be mitigated with simple and effective dust controls in most countertop operations. Workers involved in manufacturing, finishing, and installing natural and manufactured stone countertops are at risk for significant crystalline silica exposure. Crystalline silica commonly occurs in nature as the mineral quartz, and is found in granite, sandstone, quartzite, various other rocks, and sand. Workers who inhale very small crystalline silica particles are at risk for silicosis - an incurable, progressively disabling and sometimes fatal lung disease. Silicosis results in permanent lung damage. Silica dust particles become trapped in lung tissue, causing inflammation and scarring and reducing the lungs' ability to take in oxygen. Symptoms of silicosis can include shortness of breath, cough and fatigue, and may or may not be obviously attributable to silica. Workers exposed to airborne crystalline silica also are at increased risk for lung cancer, chronic obstructive pulmonary disease (COPD), and kidney disease. OSHA and NIOSH investigated U.S. worker exposure to respirable crystalline silica in the stone countertop industry following reports from other countries of stone countertop workers developing silicosis. In at least some cases from Spain and Israel, workers were exposed in shops operating without dust suppression, and without respiratory protection. While the stone industry in the United States has worked to implement dust controls to protect workers against the dangers of silica exposure, studies and OSHA inspections indicate that exposure levels may not be adequately controlled in some stone countertop fabrication worksites in the U.S. This Hazard Alert focuses on countertop industry worker exposures to airborne silica dust, including from quartz in stone. It covers the health effects of breathing silica dust, recommends ways to protect workers, and describes how OSHA and NIOSH can help employers effectively reduce silica dust exposures. Employers must ensure that workers are properly protected from exposure to silica.

Download or read book Crystalline Silica Exposure written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Health Surveillance in Silica Exposed Workers written by Lisa Bradshaw (Respiratory nurse specialist) and published by . This book was released on 2010 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is uncertainty in Great Britain (GB) about what constitutes appropriate health surveillance for silica-exposed workers, despite evidence that new cases of silicosis are occurring. The latter is supported by data from UK-based, HSE funded, national surveillance systems for work-related illness. There is also evidence to suggest that the risk of silicosis is finite at current permissible exposure levels. Many of the industries in GB in which exposure to Respirable Crystalline Silica (RCS) may arise have signed up to a Social Dialogue Agreement (SDA), a pan-European initiative to improve the control of silica dust exposure. In part, this agreement is a commitment to undertake health surveillance where this is necessary because of a potential continuing risk of silicosis, even when recommended engineering and other controls are in place. The appropriate target population for this surveillance would likely include all workers who are exposed to levels of crystalline silica that place them at risk of developing silicosis or other silica-related lung diseases. Consequently, the GB regulator wishes to establish a standard for the health surveillance of silica-exposed workers, in order to assess whether dutyholders are complying with their duties under appropriate legislation. The objectives of this paper are 1) To identify existing recommendations for health surveillance for silica-exposed workers. 2) To assess the evidence base for these recommendations and other relevant evidence in the scientific literature. 3) To make recommendations for a standard approach to health surveillance for silica-exposed workers in the UK. It is specifically not the aim of this report to review all the available wider evidence base related to silica-exposed workers, including annual estimates of decline in lung function, although mention of these issues will be made when they pertain to health surveillance for exposed workers.

Download or read book Worker Exposure to Silica During Hydraulic Fracturing written by and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Standard Practice for Controlling Occupational Exposure to Respirable Crystalline Silica for Construction and Demolition Activities written by American Society for Testing and Materials and published by . This book was released on 2009 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantitative Relations Between Silica Exposure and Development of Radiological Small Opacities in Granite Workers written by T. P. Ng and published by . This book was released on 1994 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Controlling Silica Exposures in Construction written by United States. Occupational Safety and Health Administration and published by . This book was released on 2009 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Silica Dust and Lung Cancer written by E. Lynge and published by . This book was released on 1977 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Autopsy studies of the relationship between silicosis and lung cancer have been mainly negative; but recent epidemiologic studies have indicated a positive association, and an excess lung cancer risk has been observed in some occupational groups with exposure to silica dust. For the further shedding of light on the possible association between silica dust and lung cancer, analysis was made on mortality and cancer incidence data available in census-based record linkage studies from the Nordic countries for males in occupational groups with potential exposure to silica dust. The study showed an excess lung cancer risk for foundry workers in all the Nordic countries and for miners in Sweden. These results were consistent with findings from previous in-depth epidemiologic studies. The lung cancer risk did not differ significantly from that of the respective national populations for males working in excavation; stone quarries; sand and gravel pits; and glass, porcela in, ceramic, and tile manufacture. Stonecutters, who are probably not exposed to known lung carcinogens at the workplace but in some places to high concentrations of silica dust, showed a significant excess lung cancer risk in both Finland and Denmark. Excess lung cancer risks furthermore were seen for Finish miners, for Finnish males in excavation work, and for Danish glassworkers.

Download or read book Nuclear Regulatory Commission Issuances written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1982 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exposure to Respirable Crystalline Silica in Eastern North Carolina Farm Workers written by John David Archer and published by . This book was released on 2000 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: