Standard Terms and Conditions

1. Customer agrees to meet and perform all requirements described in this document and has fully read and understands all items listed within this document.

2. Customer understands that our results are based upon the quality of the data retrieved which is determined by a variety of factors, including but not limited to the limitations listed in the “Equipment” section below. These limitations are inherent to all locating equipment. The decision to proceed with drilling, excavation or any destructive methods is left entirely up to the customer. GPRS does not and cannot guarantee, warrant or represent that it will locate all items on site.

3. Customer agrees that GPRS’s liability to customer is limited to the price paid by customer to GPRS, and that GPRS is not liable for any other damages, including but not limited to compensatory, consequential or incidental damages. Customer agrees to release and indemnify GPRS and its owners, employees and agents from all losses and damages from all alleged negligence, contract, environmental or other claims by any third party.

4. It is the customer’s responsibility to prepare the site for scanning, including clearly identifying areas to be scanned, securing access to all areas required for scanning, and keeping these areas clear and free of obstructions. Delays caused by customer’s failure to do so may result in an increased price.

5. If GPRS provides maps or CAD drawings, please note that they are not survey quality. These are representations of GPRS’ utility findings performed on a previous date. The GPRS scan performed was of limited scope and utilities outside this scope are not shown.

6. GPRS does not conduct an investigation, analysis, or interpretation of soil composition, soil conditions, or geophysical, geological, engineering, or land surveying information. Customer acknowledges it understands that we are merely reporting retrieved data and that we do NOT provide geophysical, geological, engineering, or land surveying services. Customer should contact a professional in those fields if such services are needed.

7. These terms and conditions supersede any other previous terms and conditions, or representations, either oral or written.

Equipment

  • Underground Scanning GPR Antenna. The antenna with frequencies ranging from 250 MHz-450 MHz is mounted in a stroller frame which rolls over the surface. The surface needs to be reasonably smooth and unobstructed in order to obtain readable scans. Obstructions such as curbs, landscaping, and vegetation will limit the feasibility of GPR. The data is displayed on a screen and marked in the field in real time. The total depth achieved can be as much as 8’ or more with this antenna but can vary widely depending on the types of materials being scanned through. Some conditions may limit maximum depths to 3’ or less. As depth increases, targets must be larger in order to be detected and non-metallic targets can be especially difficult to locate. Depths provided should always be treated as estimates as their accuracy can be affected by multiple factors. For more information, please visit: Link

  • Concrete Scanning GPR Antenna. This GPR antenna is handheld and rolls over the surface. The antenna needs a reasonably smooth, unobstructed surface for scanning and is not able to scan within 2”-4” of obstructions such as walls and metal tracks unless they are removed prior to our work. The data is displayed on a screen during the scanning and marked on the surface in real time. The total depth achieved can be as much as 18” or more with this antenna but can vary widely depending on the types of materials being scanned through and other factors. Depths provided should always be treated as estimates as their accuracy can be affected by multiple factors.. No harmful radiation is emitted and the work can be performed at any time with people in close proximity. For more information, please visit: Link

  • Electromagnetic Pipe Locator. The EM locator can passively detect the signals from live AC power or from radio signals travelling along some conductive utilities. It can also be used in conjunction with a transmitter to connect directly to accessible, metallic pipes or tracer wires. A utility’s ability to be located depends on a variety of factors including access to the utility, conductivity, grounding, interference, and many others. Depths provided should always be treated as estimates as their accuracy can be affected by multiple factors. For more information, please visit: Link

  • Traceable Rodder. The rodder has a copper wire encased in fiberglass. The line is pushed through accessible pipes before placing a current on the wire which is then traced from the surface. The maximum traceable depth is 10’ depending on conditions and the maximum distance is 300’. The line can be pushed through a pipe with direct access such as a sewer line at a cleanout or a storm drain catch basin. It may not be able to be pushed through deeper pipes within manholes and conduits will not be accessed by GPRS. The signal cannot be located through metallic pipes. For more information, please visit: Link

  • GPS. This handheld GPS unit offers accuracy down to 4 inches; however, the accuracy will depend on the satellite environment and obstructions and should not be considered to be survey-grade. We do not provide land surveying services. Features can be collected as points, lines, or areas and then exported into Google Earth or overlaid on a CAD drawing. For more information, please visit: Link

  • Split Box. This pipe and cable locator uses a transmitter-receiver pair to locate buried metallic objects. The transmitter and receiver are attached to opposite ends of a handle and are used to locate buried metallic targets and identify if they are linear (pipes and cables) or non-linear and isolated (buried manhole covers, buried valves, metallic debris, USTs, etc.). For more information, please visit: Link

  • Magnetometer. The magnetometer detects metallic objects. Larger metallic objects can be located at depths of up to 10’ or more but total depths will depend on the size, type, shape, and orientation of objects along with the amount of interference from other objects. For more information, please visit: Link

  • Electromagnetic Induction (EMI). The EMI is moved over the surface without coming in contact with the surface so it is not affected by the terrain. However, EMI results are affected by surface features including vehicles, reinforced concrete, and buildings and will not be used in the vicinity of above-ground obstructions. For more information, please visit: Link

  • Video Pipe Camera (2"-8" pipes). This push camera is designed for video pipe inspection and pipe locating. It has a 1"-2” diameter, self-leveling camera head that provides high quality images in pipes 2"-8” in diameter. There is also a 512 Hz sonde behind the camera that can be located from above ground and provide the approximate depth to the pipe for pipes up to approximately 10’ deep. The locatable signal from the sonde will not pass through metal pipes or solid metal barriers except for cast iron. Access through a structure such as a cleanout, drain, etc. or an open pipe within arm's reach is required for inspection service and locating. When inserted, the camera can be pushed through the pipe to a maximum of 325' depending on the model being used. If the project requires entry into confined spaces to gain access to the subject piping, this would need to be coordinated by the client and a permit obtained if required. Video and photos of the interior of pipes can be provided along with inspection reports. Inspection reports are available upon request prior to execution of field work. For more information, please visit: Link

  • Video Pipe Camera (1"-4" pipes). This push camera is designed for video pipe inspection and pipe locating. It has a 1" diameter, self-leveling camera head that is used in pipes 1”-4" in diameter. There is a 512 Hz sonde behind the camera that can be located from above ground and provide the approximate depth to the pipe for pipes up to 10' deep. The locatable signal from the sonde does not pass through metal pipes or solid metal barriers except for cast-iron. Access through a structure such as a cleanout, drain, etc. or an open pipe within arm's reach is required for inspection service and locating. When inserted, the camera can be pushed through the pipe to a maximum of 100' and past 90° bends in most 2" lines. If the project requires entry into confined spaces to gain access to the subject piping, this would need to be coordinated by the client and a permit obtained if required. Video and photos of the interior of pipes can be provided along with inspection reports. Inspection reports are available upon request prior to execution of field work. For more information, please visit: Link

  • Robotic Crawler Camera. This modular, 6-wheel robotic video pipe inspection camera (crawler) is capable of 0° turns and equipped with varying wheel treads and sizes to adapt to most pipe applications. The crawler is typically used to inspect and locate pipes that are 8" in diameter and greater. The crawler is controlled by an operator at the surface using a remote control that allows for video to be viewed live during collection so observations can be made and noted as the crawler travels through the pipe. This camera is equipped with a 512 Hz sonde behind the camera head that can be located from above ground and provide the approximate depth to the pipe for pipes up to 10' deep. The locatable signal from the sonde does not pass through metal pipes or solid metal barriers except for cast-iron. Access through a structure such as a manhole, catch basin, etc. or an open pipe within arm's reach is required for inspection service and locating. When inserted, the camera can be directed through the pipe to a maximum of 1000'. For large diameter pipe applications (24" and above) the crawler can be coupled with the carriage that allows for larger and more rugged wheels to be attached and a lift that raises the camera head up to 18" allowing for the camera to be centered in the pipe for lines up to 36" in diameter. If the project requires entry into confined spaces to gain access to the subject piping, this would need to be coordinated by the client and a permit obtained if required. Video and photos of the interior of pipes can be provided along with inspection reports. Inspection reports are available upon request prior to execution of field work. For more information, please visit: Link

  • PVC Water Line Locator. The PVC water line locator (aka Thumper) can trace water lines at depths of up to 6.5’ for distances up to 650 yards from the transmitter. Access must be provided to an active water supply. Best results are achieved on larger lines such as mains and fire lines. A pressure wave is sent through the water and the sound can then be traced using a microphone. Depths cannot be provided and horizontal accuracy should be assumed to be no less than +/- 2’ due to the nature of locating sound. Client will assume the liability for damage to pipes or tripping of fire alarms if approval is given to apply this method. Link

  • 200 MHz GPR Antenna. The antenna is pulled by a handle directly across the surface. The surface needs to be reasonably smooth and unobstructed in order to obtain readable scans. Obstructions such as curbs, landscaping, and vegetation will limit the feasibility of GPR. The data is displayed on a screen and marked in the field in real time. The total depth achieved can be as much as 20’ or more with this antenna but can vary widely depending on the types of materials being scanned through. Some conditions may limit maximum depths to 3’ or less. As depth increases, targets must be larger in order to be detected and non-metallic targets can be especially difficult to locate. Depths provided should always be treated as estimates as their accuracy can be affected by multiple factors. For more information, please visit: Link