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T~ _ <br /> <br />Category Average Sampling Results' Sampling Freeuenc7~ & Actions" <br />I C ~ 0.29MPCa -Monthly sampling <br />II 0.25MPCa ~ C G MPCa -Weekly sampling <br />-Area posted as airborne <br />radioactive materials ar=a <br />III C ~ MPCa -Daily sampling <br />-Take all Category - II actin-.~ <br />-Area posted as respira±ory <br />protection required area <br />-Take corrective actions to <br />reduce C to MPCa <br />• C = The average concentration for the previous applicable period. <br />MPCa = The applicable maximum permissible concentration. <br />*' Sampling frequencies may be decreased no less frequently than <br />once every six months. <br />Sampling frequencies may be increased at any time concentrations <br />exceed the category on which the current sampling frequency <br />is based. <br /> <br />Areas without a previous sampling history will be sampled on <br />a weekly basis (Category - II) for a period of one calendar <br />year prior to establishing the proper sampling frequency. <br /> <br />n <br />~. <br />17 <br />• <br />