Hardrock and gravel packed water wells. Exploratory testholes & monitoring wells. Pump installation, Repair & certification. Construction testing & inspection. Concrete & asphalt testing. Welding inspections. Soil investigations. Septic-tank systems designs. Air percussion & direct rotary drilling methods. Hollowstem auger-geotechnical & environmental. Overburden casing advancement. Isolated water zone testing. Submersible test pumping to determine well yield & drawdown. Cathodic protection wells.