Zapata Incorporated

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Environmental Investigations

ZAPATA has successfully applied geophysics to environmental investigations across the country, with experience at federal facilities, Superfund sites, and other areas containing hazardous materials. In the course of site characterization for these types of projects, drilling and sampling is often complicated by regulations and decontamination requirements. Non-intrusive geophysical methods can provide the subsurface information necessary for developing a mitigation plan.

Geophysical methods used for environmental investigations at ZAPATA include frequency-domain EM, time-domain EM, metal detectors, magnetics, GPR, seismic reflection, and electrical resistivity imaging.

Seismic Refraction for Contaminant Transport

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A seismic refraction survey was conducted by ZAPATA at the former Square D Site in Atlanta, Georgia. The objectives of the seismic survey were to map the depth to bedrock and identify bedrock features (fractures, low areas, etc.) that may affect contaminant transport, and, through the evaluation of bedrock velocity, identify fractures which may also affect contaminant transport and the ability to do in-situ remediation.

DC Resistivity Surveys at Former Landfill, Ft Carson

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On the site of a former landfill, ZAPATA conducted electrical (DC) resistivity imaging to determine the bedrock/overburden contact in order to identify possible buried stream channels. The geophysical data were very effective in mapping subsurface geologic formations and delineating sand and gravel channels incised into the bedrock.