A professional who measures tanks of varying sizes and shapes to determine incremental and total liquid capacities, using one or both of following methods. Respnsibilities include:

• (1) Extends tape to encircle tanks at specified level to measure circumference.
• Lowers tape to measure outside and inside heights at specified places.
• Measures width, height, and thickness of projections, such as flanges, boltheads, shell plate, butt-welded joint, rivets, overflows, and floating roofs, using tapes, calipers, and straightedge.
• Records measurements and calculates total and incremental tank capacities to prepare gauging tables, following formulas.
• (2) Measures tank, using liquid calibration methods.
• Turns valves to admit measured quantities of liquid from calibrated container into tank being calibrated.
• Lowers tape into tank at specified places and records measurements.
• Repeats process to obtain measurements at various levels.
• Takes temperature, samples, and records type of calibration liquid, using thermometer and sample container.
• Prepares gauging tables, following formulas.
• May prepare sketches and drawings of tanks and tank projections.