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We have used Resistivity Surveys to: <br /> • Map Faults <br /> • Map fracture zones for water well sighting <br /> • Map large karst voids and sea caves <br /> • Find depth to groundwater, in certain specific situations <br /> • Generally characterize subsurface geology. <br /> • Aid environmental contamination flow projects when used to evaluate locations of paleo stream <br /> channels or fault zones. <br /> • Find buried bedrock valleys, which can be an important source of groundwater in unconfined aquifers. <br /> • Delineate vertical joints or cracks,which can indicate subsidence features. <br /> If you have any questions or comments, please do not hesitate to call. <br /> Patrick Lehrmann RGP <br /> Principal Geologist/Geophysicist <br /> Southwest Geophysics Inc. <br /> 7438 Trade Street <br /> San Diego, California 92121 <br /> Tel: 858 527 0849 <br /> Fax: 858 527 0851 <br /> Cell: 760 908 6215 <br /> plehrmann@southwestgeophysics.com <br /> Hans van de Vrugt, C.E.G., R.Gp. <br /> Principal Geologist/Geophysicist <br /> Southwest Geophysics, Inc. <br /> 7438 Trade Street <br /> San Diego, California 92121 <br /> Tel: 858-527-0849 <br /> Fax: 858-527-0851 <br /> Cell: 858-204-2863 <br /> hvandevrugt@southwestgeophysics.com <br /> 4 <br />