Our Offices


P.O. Box 62228

Midland, TX 79711

Tel: (432) 563-2200

Fax: (432) 563-2213


P.O. Box 53525

Lafayette, La 70505-3525

Tel: (337) 572-9937

Fax: (337) 572-9938


P.O. Box 2426

Lindale, Tx 75771

Tel: (903) 881-8390

Fax: (903) 881-8395

San Antonio Texas

Tel: (432) 631-4587


Site Assessments

In partnering with our clients to evaluate the presence or extent of contaminants on their properties, we combine an in-depth knowledge of the site history, geology and hydrogeology, economic and environmental goals, and state and federal regulatory requirements. A site assessment may take on many forms, depending on the complexities of the site. Etech’s staff has performed thousands of site assessments of varying complexities for our clients and within the regulatory framework that drives the majority of our clients work, our staff demonstrates daily expertise in the following regulations:

  • Resource Conservation and Recovery Act (RCRA)
  • Comprehensive Environmental Response Compensation, and Liability Act (CERCLA)
  • Toxic Substances Control Act (TSCA)
  • Clean Water Act (CWA)
  • Clean Air Act (CAA)
  • Safe Drinking Water Act (SDWA)
  • Underground Injection Control (UIC) Programs
  • Spill Prevention Control & Countermeasures (SPCC)
  • Surface Mining Control & Reclamation Act (SMCRA).

The following are descriptions of a few of the types of site assessments our staff can perform.

Surface and Subsurface Soil Investigations

Etech continues to be a recognized leader in all types of soil investigations. Any good soils investigation starts with a basic understanding of site history and local geology. With this information, Etech can develop cost-effective approach to your soil investigation needs. To ensure the technical adequacy, accuracy, and cost effectiveness, Etech staff maintains an in-depth understanding of many different types of drilling techniques including:

  • Direct Push Technology
  • Hollow-Stem Auger
  • Solid-Stem Auger
  • Core
  • Air-Rotary
  • Mud-Rotary
  • Rotosonic

At Etech, an effective surface or subsurface investigation begins with an intimate understanding of the sites environmental chemistry and the selection of the correct type of analytical testing for site-specific conditions. Etech’s tenured environmental professionals can make the determinations necessary to produce a comprehensive and costs-effective analytical program. We utilize state-of-the-art field screening techniques and maintain a network of reliable and precise analytical laboratories to help ensure that our staff provides the very best service to our clients.

Groundwater Investigations

Our staff has successfully conducted hundreds of groundwater investigations. With our knowledge of drilling techniques, site history, and local hydro-geologic conditions, we can design a cost-effective solution to solve your groundwater liability issues. Etech’s specialized groundwater investigative skills include, but are not limited to:

  • Groundwater Modeling
  • Aquifer Testing
  • Soil Hydraulic Properties Screening
  • Dedicated Monitoring Equipment
  • Groundwater Chemistry
  • Monitoring Well Design & Installation
  • Micropurge Sampling Techniques
  • Characterization of Nonaqueous Phase Contaminants (LNAPL and DNAPL)
  • Expert Testimony
  • Risk-Based assessment
  • Field-Based Analysis of Soil and Water Chemistry

In many instances, Etech’s staff has been able to take on projects from other consultants and obtain timely regulatory closure, where our previous competitors fell short.

Geophysical Investigations

With many of our subsurface and groundwater investigations, we need to assess areas of the site below the surface where data gaps exist, or where we need additional hydrogeologic data to support the assessment of the site. In this case, Etech will often call on the use of geophysical investigation techniques to assist in the assessment activities. A few of those techniques commonly utilized are listed below:

  • Ground Penetrating Radar
  • Shallow Seismic Refraction
  • Electromagnetic Radiation
  • Electrical Resistivity
  • Down-hole Resistivity and Gamma Logging
  • Micro Gravity
  • Three Dimensional (3-D) Geophysical Tomography

These are tools that, when implemented, have helped us in saving our clients assessment dollars.

Surface Water Investigations

In cases where impacted surface waters are involved, Etech’s staff is trained in many of the industry-accepted practices of sampling both surface water and sediments. Starting with an understanding of site history, site and local drainage features, and knowledge of upstream influences, our staff can design a quality surface water-sampling program to meet your needs. The following are just a few of the specialty surface water assessment tools that we utilize:

  • Surface Water Modeling
  • Dedicated Monitoring Equipment
  • Stream Flow Measurement
  • Surface Water Chemistry
  • Field-Based Analysis of Water & Sediment Chemistry
  • Isokinetic & Non-Isokinetic Samplers
  • Sample Filtration Requirements and Techniques
Air Quality Assessments

Both indoor and outdoor air quality are environmental issues that are increasingly the subject of regulatory and public scrutiny. Etech provides air quality assessment services to a wide range of industrial customers, including manufacturing, petrochemical, solid waste, and oil and gas operations. We help our customers comply with both state and federal requirements. Again, with a firm understanding of site operations, chemical processes, and sound assessment tools, Etech can assist any client with their air quality assessment and permitting needs.

Phase I Environmental Site Assessments (Phase I ESAs)

Our Phase I ESAs are performed in accordance with American Standard Testing Method (ASTM) E 1527-05 (the "ASTM Standards"), which has been deemed by the U.S. Environmental Protection Agency to completely satisfy the requirements of CERCLA.

The scope of the Phase I Environmental Site Assessment is limited to interviews with past and present owners, operators, and occupants; reviews of historical documents and records (including, but not limited to, aerial photographs, fire insurance maps, building department records, chain of title documents, and land use records); reviews of federal, tribal, state and local government records or databases of governmental records; a visual on-site inspection; notations of improvements on the subject property; a visual inspection of adjoining properties; and documentation of the presence or likely presence of contamination at the property to the extent practicable. In addition to the routine Phase I approach, Etech also offers modified assessments, which focus on specific aspects determined by our clients’ needs. These can include pre and/or post construction or drilling surveys, existing environmental conditions surveys, and pre-sale surveys to identify potential areas of concern or recognized environmental conditions.

Phase II ESAs

Phase II ESA’s are conducted if a Phase I assessment indicates a strong likelihood that contamination exceeding regulatory action levels is present at a site. The Phase II ESA could call for comprehensive drilling, sampling, and analytical testing to more precisely define the type and extent of contamination, as well as to define appropriate remedial actions and related costs.

Phase III ESAs

A Phase III ESA, if called for, would involve actual remediation, taking steps to restore the site to an acceptable condition. Etech can carry out most all types of remediation.

Specialty Assessments

Many of our assessments require special investigation techniques or an assessment of unique waste products. Below is a list of some of those specialty assessments that our staff has extensive experience in:

  • Naturally-Occurring Radioactive Material (NORM)
  • Lead-Based Paint
  • Asbestos
  • Mold
  • Indoor Air Quality
Why Etech?
  • Over 90 Years of Combined Site Assessment Personnel Experience Fully Insured
  • Regulatory Agency Respected
  • Affordable Rates
  • Qualified Personnel
  • Rapid Report Turnaround