20063_NCravenStRR_GPRReport_20151104

Ground Penetrating Radar Systems, Inc.
New Bern, NC
November 4, 2015
Page I 1
Mitch White
Ground Penetrating Radar Systems
[phone]
[e-mail]

P NETRAND
It A D A It
SYSTEMS, INC.
Darren R. Lockhart, P.G.
The EI Group, Inc.
Environmental, Health and Safety Solutions.
Direct: 919.459 . 5278
Mobile: [phone]
Fax: 919 . 657. 7551
SCOPE OF WORK
Ground penetrating radar was used to inspect and locate and possible underground storage tanks or tank
pits where a UST might have been in the past.
On the following pages you will find information regarding the equipment we used, the survey process
executed on site, and information on the results of the survey. Additionally, you will find photos areas
surveyed for reference.
EQUIPMENT USED
We used a GSSI (Geophysical Survey Systems, Inc) Ground Penetrating Radar Unit with one specific
antenna. The GPR head unit is classified as a SIR-3000. The antenna used on this project was a 400MHz
antenna which is capable of reaching depths between 3'-6'. This specific antenna was created and
calibrated specifically for locating underground utilities, UST's, and other underground anomalies. This
equipment represents the latest technology available from GSSI. We have found the typical accuracy
when surveying with the 400MHz antenna to be +/- 3" to the center of the object being located.
When determining the depth of an object GPR generally has a 10% margin of error. Please keep in mind
that these statistics are based on ideal concrete conditions and may not necessarily reflect the findings
from your project.
SURVEY PROCESS/RESULTS
Our survey process for this project was relatively simple. The area was relatively clear of trees and
bushes. We did a grid pattern over the entire area that need inspected to look for any possible USTs. No
USTs or tank pits were found on site. On area roughly 20'x20' was over grown and GPR could not be used
in this one location.
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Mitch White
Ground Penetrating Radar Systems
[phone]
[e-mail]

Regards,
Mitch White
Ground Penetrating Radar Systems, Inc.
[phone]
[e-mail]
www.gp-radar.com
Orange box — Shows the area where GPR was preformed.
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Mitch White
Ground Penetrating Radar Systems
[phone]
[e-mail]