| 1. | Regulate air pressure, rotary speed, and downward pressure, according to the type of rock or concrete being drilled. |
| 2. | Verify depths and alignments of boring positions. |
| 3. | Monitor drilling operations, checking gauges and listening to equipment to assess drilling conditions and to determine the need to adjust drilling or alter equipment. |
| 4. | Start, stop, and control drilling speed of machines and insertion of casings into holes. |
| 5. | Select the appropriate drill for the job, using knowledge of rock or soil conditions. |
| 6. | Operate controls to stabilize machines and to position and align drills. |
| 7. | Select and attach drill bits and drill rods, adding more rods as hole depths increase, and changing drill bits as needed. |
| 8. | Drill or bore holes in rock for blasting, grouting, anchoring, or building foundations. |
| 9. | Operate machines to flush earth cuttings or to blow dust from holes. |
| 10. | Drive or guide truck-mounted equipment into position, level and stabilize rigs, and extend telescoping derricks. |
| 11. | Perform routine maintenance and upgrade work on machines and equipment, such as replacing parts, building up drill bits, and lubricating machinery. |
| 12. | Drive trucks, tractors, or truck-mounted drills to and from work sites. |
| 13. | Record drilling progress and geological data. |
| 14. | Retrieve lost equipment from bore holes, using retrieval tools and equipment. |
| 15. | Assemble and position machines, augers, casing pipes, and other equipment, using hand and power tools. |
| 16. | Pour water into wells, or pump water or slush into wells to cool drill bits and to remove drillings. |
| 17. | Operate water-well drilling rigs and other equipment to drill, bore, and dig for water wells or for environmental assessment purposes. |
| 18. | Perform pumping tests to assess well performance. |
| 19. | Document geological formations encountered during work. |
| 20. | Withdraw drill rods from holes, and extract core samples. |
| 21. | Retract augers to force discharge dirt from holes. |
| 22. | Place and install screens, casings, pumps, and other well fixtures in order to develop wells. |
| 23. | Design well pumping systems. |
| 24. | Disinfect, reconstruct, and redevelop contaminated wells and water pumping systems, and clean and disinfect new wells in preparation for use. |
| 25. | Review client requirements and proposed locations for drilling operations to determine feasibility, and to determine cost estimates. |
| 26. | Observe electronic graph recorders and flow meters that monitor the water used to flush debris from holes. |
| 27. | Signal crane operators to move equipment. |
| 28. | Inspect core samples to determine nature of strata, or take samples to laboratories for analysis. |
| 29. | Fabricate well casings. |
| 30. | Operate hoists to lift power line poles into position. |