Ground penetrating radar (GPR)
Ground Penetration Radar is a non-destructive testing method used to locate materials such as concrete, plastic, metal, steel, rock, soil, ice, and pavement. At EMA Concrete Scanning, we use the latest GPR technology to provide critical information on utilities, structural elements and other potential obstructions within existing concrete structures or underground. You are presented with two- and three-dimensional images of the scanned areas without delivering any radiation, unlike X-ray equipment. All of our equipment is registered and meets all standard FCC regulations. All our operators are skilled professionals trained by Geophysical Survey Systems, Inc., (GSSI) in GPR methods and have many years of experience.
Because depth of exploration is dependent upon the electrical properties of material(s) inspected and interpretations are opinions based on judgments made from those acquired radar signals and/or other data, EMA Concrete Scanning does not guarantee the accuracy or correctness of interpretations and EMA Concrete Scanning will not accept liability or responsibility for any loss, damage, or expense that may be incurred or sustained by any services or interpretations performed by EMA Concrete Scanning or others. GPR scanning cannot distinguish the difference between a single rebar, conduit or post tension cable. It can only detect the center and approximate depth of target. Also, while scanning in a congested area, with upper, lower rebar mats, conduits and post-tension cables, it is advised to do a 3-D scan to differentiate between objects. We will also use RF and EM locating equipment (power must be running through these lines) to detect conduits as a second precaution.
Even though, EMA concrete scanning uses the best technology available in the market for Utility Location we cannot detect every buried utility. A buried line or pipe must conduct an electronic signal, transmitted by our equipment, to be accurately detected. At job sites, there will more than likely be subsurface utilities that cannot be detected, and many times utilities pass through a site without an above ground access point, or giving any other indication that they are there. Our friendly and knowledgeable staff is always available to explain any limitations as they pertain to your site. For these reasons, EMA Concrete Scanning is not responsible for any nonconductive lines (Non Metallic, PVC, Water Line, Etc.) and for any conductive lines with no accessible connection point or those that do not appear on blueprints, maps, or as-builts provided by customer prior to locating.
EMA Concrete Scanning is not responsible for any loss or damage arising out of the use of, or reliance on the data collected or the report presented. Re-leaser further agrees that he/she has carefully read the forgoing release agreement, knows and understands the contents of the same, and signs this release agreement as his/her own free act.
Contractor/Client is responsible for providing access to the scan areas by removing tracks, drywall, studs and other protrusions about 4” from the area to be scanned. All scan areas have to be dry to scan and mark concrete. Do not drill within 1 ½” of any marks. Contractors, Builders or clients must mark the areas they desire EMA to scan using GPR or Electromagnetic induction methods The contractor/client is also responsible for providing scaffolding and lifts for access to the scan areas. A representative from client’s company should be present to review results once scanning is complete.
If the scanning takes longer because of extended coverage or as a result of the area not being prepared for scanning, an additional charge at our normal billing rate will be applied for each additional hour per man/machine. All payments of invoices are due at delivery of our reports or at date of the job performed.