Utility & Pipe Locating using GPR in San Leandro, CA

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13750 Catalina Street, San Leandro, CA 94577

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Your experienced utility locator

Penhall Technologies Scanning Analyst Ken


  • Osha 30 certified
  • 1 year experience in concrete demolition
  • Certified utility locator
  • GSSI SIR 3000 & HD Mini certified
  • TWIC Clearance

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Identify vital utility lines at a jail in Dublin

Utility scan to identify hazards below concrete slabPenhall Technologies performed underground utility locating for a jail in Dublin. The analysts completed and submitted security paperwork and performed the utility scan soon thereafter. The scan was completed on a dirt area that was approximately 20 x 45 feet.

Locate private utility lines for residential property that 811 does not locate in

Private utility locating After 811 was called to complete a public survey, a homeowner was informed they would need to have another company perform a survey on his private property. Penhall Technologies was called to complete the private utility survey and marked all the utilities found in the ground.

Determine all utility lines before expansion of airport terminal

utility locate to expand airport terminalA Bay Area airport needed to have utility locating performed in order to expand one of its international terminals. Penhall Technologies used both GPR and Radio Detection technologies to perform the survey and identify & mark all found utilities including gas and electrical lines.

Get all private utilities marked for private residencial property before undergoing tree removal

Locate and mark utilities prior to diggingIn San Francisco, a homeowner wanted to remove an old dying tree and utilize that space for an extended patio. Prior to having the tree removed and the stump and roots dug out, Penhall Technologies was called to identify and mark any utilities. All found underground utilities, including a water and sewage line, were marked and communicated to the customer.

Avoid hitting utilities when cutting to install lighting in a parking lot

Find subsurface targets using GPRA well-known social media company’s headquarters outside of San Francisco wanted to install new overhead lighting in a parking lot. The company called Penhall Technologies to perform the locates, and have all cables, pipes, and lines marked and documented in a field report. Because of the high-profile site, all analysts working at the site underwent extensive security clearance classes and obtained appropriate badging.

Utility survey for transportation company before installation of new handicap railings

Full utility survey with markings and reportsA bay area transportation company called Penhall Technologies to perform core drilling to install new handicap railings throughout their main station in Fremont. Penhall Technologies highlighted the value of a utility survey prior to coring due to the high amount of conduit running through the main station. Penhall was able to perform the work utility locating during normal business hours and did not cause any type of disturbance.