Field Services

Soil and Groundwater Sampling Services

Soil borings are used to install vertical sampling points during subsurface investigations. Soil borings may be shallow or extend into the groundwater bearing units beneath the surface and converted into groundwater monitoring wells.

CRG Texas installs soil borings and groundwater monitoring wells to identify impacts to soil and groundwater the vertical and horizontal extent of contamination needed for delineation.

Groundwater Sampling Low Flow-Submersible Pump-Passive Diffusion Bag Discrete

CRG Texas provides various methods of groundwater sampling effective according to the site conditions, regulatory program, and other data quality objectives. CRG Texas uses hand samplers, peristaltic, submersible, and bladder pumps, and passive type samplers to collect the most representative groundwater sampled according to the site conditions, regulatory agency or quality control plan requirements, and site specific needs.

The purpose of groundwater sampling is to obtain an accurate, representative water sample and transfer it to the laboratory for analysis. The EPA and TCEQ has established Low Flow- Low Stress groundwater sampling guidance to set the industry standard for collection of representative groundwater samples from monitoring wells at sites contaminated with various chemicals of concern. Essentially the low flow sampling method is used to facilitate fresh groundwater sample collection using low flow rates without putting stress on the aquifer while measuring and recording field parameters such as pH, temperature, conductivity, dissolved oxygen and turbidity.

Groundwater sampling methods CRG Texas uses include:

  • Low Flow Low Stress Sampling
  • Hand Purge Total Fluids Bailing
  • Discreet Packer Pump Sampling
  • Passive Diffusion Bag Sampling
  • Peristaltic, Submersible, and Bladder Pump Sampling