ECA Geophysics

GPR survey to locate USTs and piping at a retail facility


Courtesy of ECA Geophysics

PROJECT: GPR survey with confirmatory drilling + soil and water sampling / analysis
LOCATION: Spokane, Washington
PROJECT DESCRIPTION: Designed and performed a tight-line / saturation Ground Penetrating Radar (GPR) survey of an active retail property, to determine the presence, if any, of buried 1950s-vintage underground storage tanks (USTs). Performed onsite instrument 'calibration' with known onsite buried features, to establish reliable depth estimates. Directed drilling contractor in the strategic placement of soil borings, to confirm GPR interpretations. Successfully confirmed the absence of USTs at key locations having GPR anomalies solely attributable to an eroded bedrock surface. Directed subsequent groundwater sampling activities.

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