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Terms & Policies

©2018 Enviroprobe Service, Inc. : 81 Marter Avenue : Mt. Laurel, NJ 08054 : 856.858.8584

Blog

March 2, 2015

It's a very common practice for environmental consultants to get soil samples around underground storage tanks (USTs). The selection of drilling locations depends on a lot of factors and sometimes it's preferable that they are located as close as possible to USTs without risking damaging them. Ground penetrating radar (GPR) is a great tool to use to delineate UST scopes due to its very high lateral resolutions.

GPR can be used to delineate scopes of USTs made of steel or fiberglass. Even if a concrete slab is constructed on the ground surface for the protection of UST, i...

February 18, 2015

We are proud to announce that Enviroprobe Service, Inc. will be a sponsor of 3rd Annual Southwest Florida Brownfield Symposium. As a company providing drilling and geophysical services for more than 20 years, being a sponsor of the symposium is our continuing effect to support environmental communities.

The symposium is to be held on March 20, 2015 in Fort Myers, FL. Its goal is to assist you in putting your Brownfield puzzle together as you thrive towards economic enrichment through redevelopment. There will be a diverse group of volunteer speakers with a wide range of...

February 15, 2015

Ground penetrating radar (GPR) has many applications. One of its applications in engineering is to delineate lateral extents of footings for bridges, buildings and other structures. Design and as-built plans are not always available when needed and a GPR survey could provide valuable information about the footings in a non-destructive and efficient way.

The GPR profile below shows a concrete footing with reinforcement. The top of the footing was about 3' underneath a concrete floor. The GPR profile was collected next to a steel supporting structure.

February 13, 2015

"The ground is snow covered, is it OK for the GPR survey?" This is a very common question from our clients. Ground penetrating radar (GPR) actually works well through snow or ice. Below is a GPR profile showing an underground storage tank (UST) with ground covered by about 4 to 6" of snow. The located UST was marked on-site as in the picture to the right.

Although snow or ice on the ground surface wouldn't block GPR signals, it's not a favorable working condition for some types of GPR surveys, such as those searching for underground utilities. A GPR designed for undergro...

January 23, 2015

One question we get frequently from our clients is: how accurate is underground utility locating? The alternate question is: what's the safe distance to drill or excavate away from marked underground utilities? Although there is no precise answer to this question, there are still some good practices to follow.

Some states require you keep certain distance away from marked underground utilities if powered tools are to be used. For example, in new jersey, you can only hand dig within two feet of a line marked by utility companies. In general, two feet is the minimal distan...

January 7, 2015

Enviroprobe recently conducted soil resistivity testing with Wenner Array 4-point Method at several sites in central and north New Jersey. This method is the most commonly used test method to measure the resistivity of soil for electrical grounding design. The Wenner array consists of a line of four equally spaced electrodes. Current is injected through the outer electrodes and potential is measured between the inner electrodes. The testing utilized an Advanced Geoscience Inc. (AGI) SuperSting R8 resistivity system and was done in a perpendicular pair at each testing lo...

January 6, 2015

When there is a good penetration depth for ground penetrating radar (GPR), GPR can be used to estimate thicknesses of subsurface layers. However, caution has been taken as such estimation may not be accurate without references or ground truth information. 

As EM waves from GPR travel down and bounce back from a subsurface interface between two layers, the travel time can be determined. In order to calculate the depth to the interface, the wave travel velocity needs to be known. Although there are indirect ways to estimate the wave velocity and depths such as using the co...

December 23, 2014

Enviroprobe recently conducted an underground void locating survey at a traveling center in New Jersey. MASW instead of electrical resistivity tomography (ERT) was used due to reinforced concrete in the survey areas. MASW is one of the seismic survey methods evaluating the elastic condition of subsurface materials. MASW measures seismic surface waves generated from a seismic source, analyzes the propagation velocities of those surface waves, and then finally deduces shear-wave velocity (Vs) variations of subsurface materials.

For each survey area, survey lines were laid...

November 14, 2013

Over the years, the geophysical service provided by Enviroprobe for environmental and engineering communnities has grown tremendously. Our geophysicists and geophysical technicians employ varieties of geophysical methods including but limited to: ground penetrating radar (GPR), precision locating (for underground utility lines), borehole geophysical logging, DC electrical resistivity, sub bottom profiling, seismic, and EM mapping.

Our services include but not limited to:

  • Locating underground metallic and nonmetallic pipes and utility cables

  • Delineating undergroun...

November 14, 2013

Before you sign a contract with a geophyscial service provider, there are some general considerations for the site conditions you need to discuss with them for cost-effective and successful geophysical surveys.

  1. Is the site generally accessible through vehicles or ATVs? Geophysical equipment for some tasks could be heavy and vehicle access could speed up the data acquisition process significantly. Sometimes the data acquisition design/logistics could be totally different depending on the easiness of vehicle access.

  2. Is the site generally walkable? Is it heavily ve...

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