Analyze rock and mud to detect the presence of oil.
Supervises and coordinates activities of workers engaged in installing acoustical tile to walls and ceilings of buildings: Measures and marks centerlines, guidelines, and location of hooks that hold ceiling suspension grid, according to blueprints and written specifications, to lay out work, using level, plumbline, chalkline, and tape measure. Directs workers in various installation tasks, such as suspending metal grids from ceilings, aligning and butting tile with joints of previously laid tile, and securing tiles with nails, screws, staples, or glue. Inspects smoothness of surfaces, alignment and butting of tiles, and fastening of tile for adherence to specifications. Performs other duties as described under SUPERVISOR Master Title.