The initial PSG survey identified TCE source areas that did not agree with the GPR survey findings. Based on these results, a subsequent PSG survey was performed to further characterize the site and better define the source areas identified in the initial survey. Analytical results were provided to the client within four (4) days of receipt of samples at the laboratory for both surveys. The results clearly showed the locations where disposal of TCE had occurred. The client was able to significantly reduce the characterization budget by reducing the number of soil and groundwater samples that were required.