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About Terra


Terra Testing, LLC (Terra) was incorporated on November 14, 1977, in the State of Texas (Texas Registered Engineering Firm F-4444). For the last 40 years Terra has been providing professional engineering and testing services for the engineering construction industry in Texas, New Mexico and Oklahoma. Terra specializes in geotechnical engineering, construction materials testing and inspection, and environmental services. These services are delivered on a timely manner with consistently high value and personal attention to the Clients’ needs.

Terra offers geotechnical drilling, sampling, geotechnical lab testing, geotechnical engineering and construction material testing and inspection services to the construction industry for the past 40 years. Our basic strength is our commitment to our clients. Terra’s responsiveness, high-quality deliverables, practical solutions, and competitive fees, provide clients with an easier way of doing business that saves time and money.

Terra helps the clients by effectively executing projects, controlling costs and managing risk. Our clients appreciate this approach with personal touch and it speaks for itself from the long list of repetitive clients we have served for the past 40 years in the states of Texas, New Mexico and Oklahoma.

The combination of our resources and local-area expertise helps Terra to successfully complete challenging projects and deliver results on  a timely manner to our client. Our corporate culture and structure enables us to excel beyond our client’s expectations.
Terra has full services offices with geotechnical drill rigs and laboratory in Lubbock, Dallas and San Antonio, Texas.

Client Satisfaction

By providing consistent, responsive service that delivers superior value for money.

Quality Service

By providing timely execution of services in accordance to accepted professional standards.

Why choose Terra:


Over four decades, TERRA has developed a keen understanding of local geology and stratigraphy of the areas it serves. This valuable experience helps TERRA to provide a cost-effective and value-added solutions that optimizes the overall design and construction.


Our highly skilled and experienced Professional and certified Technicians work as a Team to meet the demanding time schedule which in turn helps to maintain a good customer service.

QA/QC Program

TERRA is accredited by AMRL and USACE. TERRA voluntarily participates in the proficiency sample program instituted by AASHTO Materials Reference laboratory (AMRL), Cement & Concrete Reference Laboratory (CCRL) & Texas Department of Transportation (TxDOT).

Quality Assurance

Terra follows a well-structured Quality Assurance and Quality control program that audits every step of laboratory and field procedures. Terra meets the requirements of ASTM Standards E329 -Materials, C1077-concrete, D3750 -Soil and Rock and D 3666-Bituminous.

Our QA/QC program includes strict guidelines for:

Organization and Management


Facilities and Equipment

Quality System- Audit and Review

Calibrations and Tests

Records and Test Reports

All our technicians regularly undergo in-house training and refresher programs.

Terra participates in the following Proficiency Sample Program instituted by AASHTO Material Reference Laboratory (AMRL), Cement and Concrete Reference Laboratory (CCRL) and Texas Department of Transportation (TxDOT).

Annually two (2) samples of each material are distributed to over 500 laboratories in the US and abroad and are tested as per ASTM standards. Once all the test results are received at AMRL or CCRL, average and standard deviation for each ASTM test is calculated. Each laboratory is rated based on how much the specific laboratory’s test result deviates from the average.

Terra maintains accreditation with AASHTO Material Reference Laboratory (AMRL) and USACE.

Need to Consult with us?  Schedule a call or visit?

We would love the opportunity to visit with you about your specific project.

Our Services

Terra also provides a wide variety of testing services. These test procedures are conducted in accordance with the requirements of ASTM, or other governing authorities.


Design and construction of functional, cost-effective structures require a thorough understanding of local soil, rock and groundwater conditions. At TERRA we strongly believe that drilling, sampling and field testing requires expertise to meet exacting standards and perform every task with accuracy and without compromising results.

The method and precision of obtaining data directly influences the decision of foundation recommendations of that specific site. Therefore, unlike other geotechnical firms, TERRA owns and operates a fleet of three (3) TxDOT certified drill rigs, and the dynamic penetrometers are energy calibrated in accordance with ASTM D 4633. Our Lead Drillers have over 25 years of experience and are NICET & TWDB certified. Since, TERRA owns and operates our own equipment, the result is a controlled response to the project schedule which helps to maintain a good customer service.

Capabilities & Services

Geotechnical Drilling and Sampling with:

  • Hollow Stem Auger drilling – 4-in to 10 1/2-in
  • Mud Rotary drilling
  • Air Rotary drilling
  • Soil, Rock and Diamond Coring – 3-in and 4-in (USACE Specification)
  • Standard Penetration Test (ASTM D 1586)
  • Texas Cone Penetrometer (Tex-132-E)
  • Piston Sampling – 3-in and 5-in (USACE Specification)
  • Thin-walled and Thick-walled Shelby Tube – 3-in and 5-in
  • Pressuremeter Testing
  • Instrumentation Installation
  • Groundwater Monitoring Well
  • Vibrating Wire Piezometer
  • Soil Resistivity Test
  • Thermal Resistivity Test
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To maintain operational and technical proficiency, all personnel are involved in continuing education regarding the equipment and technological services that we offer. All field personnel have completed the OSHA HAZWOPER 40 Hour Training course and the necessary 8 Hour Refresher courses as required in OSHA 29 CFR.


Design and construction of cost-effective functional structures require a thorough understanding of local soil, rock and groundwater conditions. TERRA has the capability and expertise to provide a wide range of Geotechnical testing services to assess the risks associated with subsurface investigation and to support all phases of a project – from preliminary design through the completion of the construction.

  • Grain Size Distribution (ASTM D 422)
  • Moisture/Density Relation (ASTM D 698/1557)
  • Specific Gravity (ASTM D 854)
  • Materials Finer than #200 Sieve (ASTM D 1140)
  • Plate Bearing (ASTM D 1196)
  • California Bearing Ratio (ASTM D 1883)
  • Unconfined Compression – Soil (ASTM D 2166)
  • Permeability – Constant Head (ASTM D 2434)
  • Consolidation (ASTM D 2435)
  • Classification of Soils (ASTM D 2487)
  • Triaxial (ASTM D 2850)
  • Unconfined Compression – Rock (ASTM D 2938)
  • Direct Shear (ASTM D 3080)
  • Atterberg Limits (ASTM D 4318)
  • In-Place California Bearing Ratio (ASTM D 4429)
  • Permeability – Falling Head (ASTM D 5084)


Geotechnical engineering and design forms the foundation of very structure built today. The critical importance of an experienced geotechnical firm cannot be overstated. A vast resource of technical capabilities, decades of diverse geographic experience, and a focus on results characterizes TERRAs’ formula for successful completion of our clients’ projects.

  • Buildings

    Low rise, high rise, residential, commercial, and industrial.

  • Transportation Infrastructure

    Roadways, bridges, airports, rail.

  • Plants and Facilities

    Piers, aprons, dredging, marinas.

  • Oil and Gas Infrastructure

    Terminals, drilling pads, platforms, refineries, pipelines, tanks.

  • Utilities Infrastructure

    Transmission towers, pipelines, substations.

  • Water storage, treatment, and pipeline facilities

  • Energy Infrastructure

    Dams and reservoirs, wind farms, LNG.

  • Mine reclamation


Construction of a project is a major investment and Terra has the experience and expertise to make sure it is constructed the way the design team has intended and ensure that the construction materials meet the standards. That is why Quality Construction Observation and Testing services performed by qualified, experienced and certified Technicians is very important because it provides a measure of due diligence that is documented.

Terra’s cross-trained field Technicians have over 20 years of experience and training in Construction Observation and Testing and are certified by following agencies:

  • National Institute for Certification in Engineering Technology (NICET)
  • American Concrete Institute (ACI)
  • Texas Department of Transportation (TxDOT)
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In order to maintain operational and technical proficiency, all personnel are involved in continuing education regarding the equipment and technological services that we offer. All field personnel have completed the OSHA HAZWOPER 40 Hour Training course and the necessary 8 Hour Refresher courses as required in OSHA 29 CFR.

Soil Testing

Soil testing services can make a major contribution to facility performance and keep costs in check by identifying potential site problems early. Terra’s certified Technicians can observe subgrade preparation, grading, utility installation and perform laboratory and on-site testing to:

  • Evaluate the suitability of on-site and off-site borrow soils for structural fills
  • Assess the need for moisture conditioning
  • Suggest alternatives for construction equipment and procedures
  • Evaluate the need for soil stabilization as a potential solution for problematic subgrade soil
  • Determine the degree of compaction achieved by performing in-place density testing

Concrete Testing

Terra’s certified Technician can provide a complete review of concrete batching operations, placement & curing procedures. Throughout the construction process, field and laboratory testing can be used, when appropriate, to determine the field properties and potential strength of the recently placed concrete to expedite construction schedules and keep the project on track. Terra’s professionals and certified Technicians can:

  • Observe and document the concrete placement conditions
  • Sample fresh concrete on site for air content, slump, temperature and unit weight
  • Make cylinders and beams for strength tests
  • Evaluate hardened in-place concrete for deficiencies
  • Evaluate and provide recommendations for special material such as grout & lightweight concrete
  • Perform mix designs in accordance with ACI and ASTM standards

Asphalt Testing

Asphalt field and laboratory testing services can be performed to document that the asphalt pavement system is placed and constructed in accordance with the projects specifications and plans. Terra’s certified Technicians can provide:

  • Asphalt mix designs and mix verifications
  • Batch plant testing to assess aggregate gradation, asphalt content, bulk specific gravity,
  • Marshall stability and flow
  • Field observations of compaction procedures and mix temperature
  • Measurement of thickness and compaction through core samples and nuclear density testing


Terra Testing, LLC has the necessary expertise to perform the following environmental site assessment services

  • Environmental Site Assessment Phase I
  • Environmental Site Assessment Phase II

Terra also specializes in the installation of groundwater monitor wells, gas monitoring wells and piezometers.

Recent Projects

ASTM Standards

Listed are few ASTM Standards

Show Available ASTM Documents

Contact Us


5208 Marsha Sharp Freeway
Lubbock, TX. 79407

806-793-4767 Phone
806-793-4768 Fax


10555 Newkirk Street, Ste. 530
Dallas, TX. 75220

214-502-6312 Phone
214-377-8516 Fax


7496 FM 1346
San Antonio, TX. 78220

210-872-7812 Phone
210-310-1172 Fax

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