PROVIDING QUALITY GEOPHYSICAL SERVICES AT ECONOMICAL
COSTS FOR THE ENGINEERING AND ENVIRONMENTAL COMMUNITIES
Welcome to Geophysical Survey Investigations, PLLC

Geophysical Survey Investigations is managed by Mark Denil,
PG, who has more than 25 years of geophysical and geological
experience. GSI provides state-of-the-art, non-intrusive surface
geophysical surveys to evaluate site conditions primarily in the
North Carolina, South Carolina, Virginia and West Virginia
areas. Geophysical investigations consist of a range of
objectives from finding buried objects, delineating areas
containing buried waste, evaluating karst conditions, locating
top of bedrock, or establishing IBC site classification.
Geophysical Services & Examples

Geophysical project examples of commonly
used methods and applications are provided
below. Click on any of the methods or topics
in the tool bar to view actual examples.
            
              Common Geophysical Methods & Applications

    EM61 Metal Detection:  Locating buried drums, USTs, & debris.

    EM31 Survey:  Delineating buried waste, trenches, & plumes.

    MASW Survey:  Determining IBC site classification.

    Resistivity Survey:  Finding karst or bedrock features.

    Seismic Refraction Survey:  Mapping top of bedrock.

    GPR Survey:  Evaluating buried objects or soil characteristics.

    Representative Client List
P.O. Box 16265                                         Greensboro, North Carolina 27416-0265                         Office: (336) 286-9718
Mark J. Denil, P.G.                                                 denilm@bellsouth.net                                                 Cell: (336) 339-8390