Sort controls by reliability

Sort each control into the hierarchy level it best represents. Elimination Substitution Engineering Administrative PPE Remove the manual sample point by installing online measurement Use a lower-toxicity cleaning solvent approved for the task Install local exhaust at the chemical mixing skid Restrict access during sand transfer and schedule fewer people nearby Wear fitted respiratory protection for remaining vapor exposure Add a fixed guard around a rotating coupling Replace a high-pressure manual wash step with a preassembled clean spool Use cut-resistant gloves during approved blade handling Rotate workers to limit heat exposure time Switch to pre-diluted chemical totes to reduce mixing…

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