A majority of some (silica samples) may show levels of silica.Logical formLearned from2 sentences. Employees may be exposed to levels of silica.Logical formLearned from2 sentences. Recommendations can be for a (silica exposure).Logical formLearned from2 sentences. Emphasis may be placed on reducing exposures.Logical formLearned from2 sentences. Training may focus on (silica hazards).Logical formLearned from2 sentences. Hazards may be associated with silica.Logical formLearned from2 sentences. Exposure can be to silica of stone.Logical formLearned from2 sentences. Illnesses may be associated with (employee exposure) to crystalline silica.Logical formLearned from2 sentences. A partnership can be on hazards of (silica exposure).Logical formLearned from2 sentences. Materials may be suspected of containing silica.Logical formLearned from2 sentences. Silica may contain debris.Logical formLearned from2 sentences. Employees can be with (silica exposures).Logical formLearned from2 sentences. A (lung damage) may be caused by silica.Logical formLearned from2 sentences. A worker may breathe in a silica.Logical formLearned from2 sentences. A silica can be airborne.Logical formLearned from2 sentences.