REPRESENTATIVE CLIENT LIST
Geophysical Survey Investigations, PLLC has provided geophysical services to the following industrial
facilities, power utilities, engineering companies, environmental firms, and state agencies.  This partial list
represents a cross-section of companies and industries and does not contain all of the geophysical clients
.
Altura Environmental
ATC Associates
Boyle Consulting
CDM Environmental
CSX Railroad
Cheerwine
City of Newport News, Virginia
County of James City, Virginia
Crescent Resources
Dewberry & Davis
Duke Energy Corporation
DuPont
ENSR
Earth Tech of North Carolina
Engineering Tectonics
Entrix, Inc.
Environ International
Environmental Consulting Services
Federal Highway Administration
Froehling & Robertson
Geoscience Group
Groundwater & Environmental Services
Hart & Hickman, P.C.
IMS Environmental
Liles Construction
Mountain Environmental
North Carolina Department of Transportation
North Wind
Pyramid Environmental & Engineering
Rodger & Callcott
SCS Engineers
S&ME Inc.
Solutions IES
TRC Environmental
TerraQuest Environmental
Thrasher Engineering
Triad Engineering
URS Diamond - (DuPont)
Vertex Engineering Services
Weston Solutions
Zapata Engineering
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