Examinations are also to be provided to all employees who have had 10 years or more exposure above the action level for more than 30 days per year while working for the present or predecessor employer though they may no longer be exposed above the level. An initial medical examination is to be provided to all such employees by December 1, 1978. In addition to its immediate diagnostic usefulness, the initial examination will provide a baseline for comparing future test results.
Periodic examinations are also to be provided to the employees listed above.
Periodic examinations need not include sputum cytology and only an updated medical history is required. These examinations shall include all tests required in the initial examination, except that the medical history need only be updated. The examination contents are minimum requirements. Additional tests such as lateral and oblique X-rays or pulmonary function tests may be useful. For workers exposed to three arsenicals which are associated with lymphatic cancer, copper acetoarsenite, potassium arsenite, or sodium arsenite the examination should also include palpation of superficial lymph nodes and complete blood count.