GPR Underground Scanning Services

GPR OneCall’s subsurface utility locating and engineering services combine art and science with extensive training, professional experience, and the latest equipment. No single utility location instrument can detect all types of buried utilities, which is why it is imperative to utilize a variety of instruments that are uniquely suited to specific tasks. GPR OneCall proudly offers its GPR underground scanning services in Long Island, Manhattan, Bronx, Brooklyn, Queens, and Staten Island, NY, as well as New Jersey and Philadelphia, PA.

Ground Penetrating Radar Systems

Our GPR undergrounding scanning services utilize the newest technology for surveying the property and locating hard to detect utilities such as plastic pipes used for water pipelines and gas lines. GPR is also the most effective way of detecting voids and underground storage tanks (USTs).

GPR works by sending a radio signal or series of signals into the ground. The returning signals provide information about changing ground characteristics with depth. GPR undergrounding scanning services we offer help us determine the dimensions of electric, gas, and sewer lines, as well as function as a cable line locator and phone line finder.

GPR is not without its limitations. Soils absorb GPR radio wave signals with high clay, moisture, or saline content, significantly limiting exploration depth. Ground-penetrating radar systems’ effectiveness in subsurface utility engineering and locating is thus site-specific and varies considerably from place to place.

Electromagnetic Detection (EM)

Electromagnetic detection (EM) utilizes several different methods to locate utilities known as passive, conductive, and inductive. Our experienced EM technicians evaluate each project while on-site to determine the most effective means to use.

EM works by detecting the electromagnetic radiofrequency emitted by conductive materials. The radiofrequency is conducted or induced onto the utility by a transmitter. This signal is carried by the conductor along its length and detected above ground with the radio frequency antenna. Often, buried electric lines and telephone utilities radiate their own electromagnetic field and can be readily detected using the radio frequency (RF) receiver without inducing a current. By identifying the maximum signal strength at several locations, the surface trace of an underground utility can be determined.

Hydro-Vacuum Excavation

Hydro-vacuum excavation allows for exposing buried utilities without any damage that might occur if excavating machinery or convention hand tools are used. Then, exact depth measurements and DGPS coordinates can be obtained for mapping or CAD drawings. This technology lets us repair water/sewer lines or clear blocked pipes.

Concrete Scanning

Concrete scanning services can help you determine the location of rebar, post-tension cables, pipelines, and conduits embedded within concrete structures before drilling, cutting, or coring. Also, our concrete inspection services can help you determine the location of voids, pinpoint deteriorating areas of concrete and perform quality control inspections of newly built or existing concrete structures.

Ferromagnetic Detection (FM)

Ferromagnetic detection (FM) is the method of detecting the magnetic field radiated by ferrous iron base metals. Unlike EM detection, FM can locate metal objects such as stakes, rebar, and other non-attached metals. FM is also used when vacuum excavating to verify the proximity of metallic utilities or casings.

Contact GPR OneCall

Our professional GPR underground scanning services, including mapping, survey, cable line locator, and phone line finder technologies, allow us to excavate your property safely and efficiently. We’re proud to offer all of our GPR underground scanning services in the following areas:

  • Long Island, NY
  • Manhattan, NY
  • Bronx, NY
  • Queens, NY
  • Staten Island, NY
  • New Jersey
  • Philadelphia, PA

For more information about our private utility location services or concrete scanning services, contact us today! Read our Frequently Asked Questions to learn more about how GPR OneCall can help you and your property.

  • Ground Penetrating Radar (GPR) being used by a technician in Long Island, NY

    Ground Penetrating Radar (GPR)

    GPR is the newest technology for locating hard to detect utilities such as plastic pipe that is used for water and gas lines. GPR is also the most effect way for detecting voids and underground storage tanks (UST’s).

    GPR works by sending a radio signal or series of signals into the ground. The returning signals provide information about changing ground characteristic with depth.

    GPR is not without its limitations. GPR radio wave signals are absorbed by soils with high clay, moisture or saline content greatly limiting exploration depth. GPR effectiveness is thus site specific and varies greatly from place to place.

  • Electromagnetic Detection (EM)

    EM utilizes several different methods to locate utilities know as passive, conductive and inductive. Our experienced EM Technicians evaluate each project while on site to determine the most effective methods to use.

    EM works by detecting the electromagnetic radio frequency emitted by conductive materials. The radio frequency is conducted or induced onto the utility by a transmitter. This signal is carried by the conductor along its length and is detected above ground with the radio frequency antenna. Often, buried electrical and telephone utilities radiate their own electromagnetic field and can be readily detected using the radio frequency (RF) receiver without inducing a current. By detecting the maximum signal strength at several locations, the surface trace of an underground utility can be determined.

  • Vacuum Excavation

    Vacuum excavation allows for exposing buried utilities without any damage that might occur if excavating machinery or convention hand tools are used. Then exact depth measurements and DGPS coordinates can be obtained for mapping or CAD drawings

  • Concrete Scanning

    Concrete scanning services can help you determine the location of rebar, post tension cables, pipes and conduits embedded within concrete structures prior to drilling, cutting or coring. In addition, our concrete inspection services can help you determine the location of voids, pinpoint deteriorating areas of concrete and perform quality control inspections of newly built or existing concrete structures.

  • Ferromagnetic Detection (FM)

    FM is the method of detecting the magnetic field radiated by ferrous iron base metals. Unlike EM detection, FM can locate metal objects such as stakes, rebar and other non-attached metals. FM is also used when vacuum excavating to verify the proximity of metallic utilities or casings.