Some (health citations) may be classified as (silica overexposure).Logical formLearned from2 sentences. A (silica overexposure) can be serious.Logical formLearned from2 sentences. Silica can be above levels.Logical formLearned from2 sentences. Exposures to crystalline silica can be due to tasks.Logical formLearned from2 sentences. (Silica exposures) can be high.Logical formLearned from2 sentences. Dusts may contain crystalline silica.Logical formLearned from2 sentences. Hazards may be associated with exposure to silica.Logical formLearned from2 sentences. (Worker exposure) can be to (silica dust).Logical formLearned from2 sentences. A permissible (exposure limit) may limit an amount of crystalline silica.Logical formLearned from2 sentences. Exposures can be to (silica dust).Logical formLearned from2 sentences. (Breathing silica dust) may cause silicosis.Logical formLearned from2 sentences. A person may be overexposed to crystalline silica.Logical formLearned from2 sentences. Chemicals can be as silica.Logical formLearned from2 sentences. Over-exposure to crystalline silica may be included in (repeat violations).Logical formLearned from2 sentences. Overexposures to silica may be occurred.Logical formLearned from2 sentences.