A professional who tends shaker screen to remove lumps from dried tetryl explosive. Respnsibilities include:

• Transfers trays of dried tetryl to screening area, using handtruck.
• Starts motor that activates shaker screen to separate tetryl powder from lumps.
• Dumps tetryl from trays into feed hopper of screen.
• Lines catch boxes with wax paper, and positions boxes beneath discharge spout of screen to receive screened tetryl powder.
• Weighs filled boxes and stacks on handtruck for transfer to storage.
• Carries containers of tetryl lumps to distillation equipment for reprocessing.