- 1) Collects samples of coal, ore, crushed stone, aggregate, sand or gravel from railroad cars, conveyors, stockpiles or mines and tests materials for conformance to specifications: Gathers samples from specified locations and transports samples to laboratory.
- 2) Dumps material into sample divider to reduce volume of sample.
- 3) Weighs material, using balance scale, and dumps sample into grinding machine to grind and blend sample or into screen testing machine to separate particles by size.
- 4) Weighs segregated particles collected on each screen and computes percentage of each in total sample.
- 5) Examines samples for presence of foreign matter and variation from color standard.
- 6) Compiles reports indicating percentages of materials of specified size.
- 7) Notifies management when materials do not meet specifications.
- 8) May weigh, dry, and reweigh samples to determine moisture content of samples.
- 9) May bag samples for testing at other locations.
- 10) May perform chemical sedimentation or magnetic separation tests.