PAST PERFORMANCE





NON METALLIC UTILITY LOCATE



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GPR was successfully used to locate non metallic sewer line prior to expansion project.




Result: TeaCo Geophysical conducted a GPR survey at the Jefferson County Hospital for the purpose of locating utilities that were suspected to lie in an area of proposed expansion. The location of the line was unknown due to blue prints being unavailable. TeaCo was able to quickly and accurately locate utility corridors, and a non-metallic pvc septic line so that the client’s plans for this expansion could resume.

Client Comments: “In February of 2011, I was faced with the problem of locating utilities for which no plans were available. Many utilities were identified, and the most problematic was a suspected non metallic pvc septic line that was not able to be located by conventional methods. To quickly and accurately remedy this problem I contacted TeaCo Geophysical. The GPR technician was able to noninvasively locate and mark the location of the line shortly after arriving on site. I was pleased with the service and accurate information delivered by TeaCo. TeaCo provided the information I needed to keep my client’s expansion plans moving.”



Shelby Murray, PE
Pickering Firm





HIGH RESOLUTION 3-D SURVEY TO LOCATE UST NEAR ROADWAY EXPANSION



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Result: TeaCo Geophysical was contracted to conduct a high resolution 3-D grid survey at a historic filling station for the presence of a small UST. The historic service station had been demolished and only a remnant concrete slab remained as evidence of the site layout. The survey area was completed on two sides of the remnant slab that were believed to be most likely to provide access to the UST for product delivery.

TeaCo technicians identified a UST on this site, marked the area in the field, processed the data in the office and created a 3-D rendering to estimate the tank volume. The following day TeaCo’s client, based on details contained in our report, directed invasive operations in close proximity to the suspected UST and successfully collected soil and groundwater samples to positively identify hydrocarbon contamination in the proximity of UST.

CLIENT COMMENTS: “TeaCo provided professional services in a timely and efficient manner that assisted in us in evaluating subsurface conditions and associated contaminants”.

Charles K. Brown, RPG
Environmental Division Manager
Terracon
Ridgeland, MS





GPR SURVEY ASSISTS IN PALEONTOLOGICAL EXCAVATION



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Result: In 2008, TeaCo conducted a successful mid frequency GPR grid survey over an area located in central Mississippi for the purpose of identifying remains of potential paleontological significance. All parties agreed on confidentiality to protect landowner form undue nuisance caused by the casual fossil hunters, and to protect items for future generations to appreciate. TeaCo successfully identified numerous areas in close proximity to where an Eocene aged whale was partially recovered. These areas are to be further investigated in the near future.

Client Comments: “From hunting mammoths in the Siberian permafrost to digging dinosaurs in the Texas Big Bend, GPR is now established as an invaluable tool in the field of vertebrate paleontology. For example, a large fossil whale discovered east of Quitman, Mississippi, in the late 1970s was finally excavated in December 2005—or so we thought. That which was exposed at the surface was easily located, but as skeletons that come to rest on the seafloor can scatter across a large area, there is a need to locate dissociated parts without needless, haphazard digging. GPR provides a means by which fossil bone concentrations, primarily of large animals, may be detected so as to greatly reduce exploration time, surface disturbance, and even financial expense.”

George E. Phillips
Paleontology Curator
Mississippi Museum of Natural Science





HIGH RESOLUTION 3-D SURVEY TO LOCATE UST IN CONGESTED CITY



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Successfully located previously undetected vault in the subsurface within our client’s potential work area…no ust detected.




Result: TeaCo Geophysical was called to perform a GPR scan of a site in Metairie, LA. The site was confirmed to be a historic gas station, and the purpose of the survey was to determine the possible existence of an underground storage tank (UST). The entire lot and adjoining landscaped area was scanned in a high resolution grid survey. TeaCo technicians performed a highly accurate GPR survey and were able to verify that no UST had been located on this site. The area along the roadway was discovered because the GPR was able to distinguish the differences in soil velocity as compared to the velocity of the utility discovered. This saved the client from costly repairs to the parking lot and landscaping while also identifying the presence of a subsurface structure that was previously unrecorded.

Client Comments: "I was impressed with Mark's knowledge and the fact he was informative about the processes of how the GPR worked. I will use and recommend TeaCo in the future, thanks for the recommendation."

Lem Dial, EI
Aquaterra Engineering, LLC
Baton Rouge, LA





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GPR SURVEY USED TO LOCATE UTILITY VAULT



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GPR was successfully used to locate non metallic sewer line prior to expansion project.




Result: In August of 2010, TeaCo Geophysical was hired to locate a utility vault that fell within an area proposed to be excavated in an upcoming expansion. The vault was successfully located and lay directly below the proposed location for an elevator shaft. The expansion plans were altered to avoid potentially dangerous excavation.

Client Comments: “I contacted TeaCo Geophysical to perform a GPR survey for the purpose of locating a utility vault that was suspected to be within an area where extensive construction would be performed. TeaCo successfully located the vault. Once the exact location was known the resulting data was compared to proposed expansion plans and the elevator shaft located directly over the utility vault. I was thankful to provide my client with this information so that their expansion plans could be adjusted and construction could continue safely.”


Shelby Murray, PE
Pickering Firm