These interventions are derived from existing occupational standards and guidelines expressed as limits on exposure as measured by personal samples of an exposed miner during a full shift.
Fifteen daily personal samples of active smokers and fifteen samples of non-smokers collected in 1998, during the same seasonal period (February-April and May-June), were chosen for the present investigation.
In this study we focused on the analysis of personal samples of silica exposure levels measured as an 8-hr TWA measurement among workers in various industries and occupations, and silica levels are expressed as milligrams per cubic meter.
Personal samples of silica exposure measurements were stratified into two groups by type of inspections to explore if estimates of silica samples were biased in any direction: a) all 2,512 inspections and b) 948 programmed inspections.
Personal samples of airborne respirable silica particles were collected using OSHA method ID-142 for quartz in workplace atmosphere using a personal sampling pump and a cyclone assembly (OSHA 1996).
Personal samples of total dust (n = 45 from the coffee factories and n = 19 from the control factory) were collected throughout the working shift from the breathing zone of the workers.
