[Class : 42] Description: Scientific And Technological Services Relating To Advanced Geophysical Investigation And Subsurface Diagnostics; Research, Analysis And Evaluation Of Subsurface Conditions For The Purpose Of Detecting, Identifying, Mapping And Monitoring Seepage, Leakage, Groundwater Movement And Preferential Flow Paths In Dams, Levees, Reservoirs, Embankments And O...