Test Hole Excavation

Test hole excavation workers

Vacuum Excavation

A/I/DATA excavates test holes to determine the exact location of underground utilities that may conflict with a proposed design. We use a high-pressure stream of compressed air to loosen the soil and a powerful vacuum to extract material into a holding tank. This process is the safest method of ground excavation to expose existing facilities. We backfill and restore test holes after documenting measurements and observations. An inventory and detailed report for each test hole on subsurface structures is prepared and submitted to the client. 

The Process

1. Trained staff members arrive and secure area: Safety is always a top concern. In addition to wearing safety equipment, our staff provides maintenance of traffic and coordination with the public. 

2. Exact location of test hole is determined: Based on the targeted utility and the use of utility detection equipment, we identify the best location for each test hole. 

3. Preparation and Excavation: After carefully removing turf or pavement, we set up our equipment to conduct the excavation. All soil is vacuumed into our holding tank until the utility is uncovered. 

4. Measuring: Once the utility is located, careful measurements are made of its exact location. After measuring the precise position relative to landmarks and depth, we carefully record the findings. These are later incorporated into the test hole report. 

5. Restore the area: After the measurements are recorded, we carefully backfill and compact the soil, replacing any turf or other disturbed elements. This restores the area to its original state. 

Contact Us

1123 Hanzlik Ave.
Baltimore, MD 21237


"It was a pleasure working with your field team as they were extremely easy to work with and very accommodating with working with Schnabel when they were on site together. Your end deliverables are great. The drawings are very professional and seem to “ooze” with confidence!"

-Vince Kokal, P.E., Project Engineer, Alliance Engineering