Filters. Provide cascaded filter units on drain lines from showers or any other water source carrying asbestos-contaminated water from the Work Area. Provide units with disposable filter elements as indicated below. Connect so that discharged water passes primary filter and output of primary filter passes through secondary filter. 2.7.1 Primary Filter - Passes particles 20 microns and smaller 2.7.2 Secondary Filter - Passes particles 5 microns and smaller 2.7.3 Provide spare filters for both personnel and equipment decontamination unit water filters.
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