HDD Sampling Underway at Superfund Site, Eastern Washington
DTD is currently undertaking an extensive horizontal drilling program to provide nearly three dozen environmental soil samples beneath a closed landfill at a Superfund site in Washington State. Utilizing a Vermeer 24x40A drill rig, equipped with customized sampling equipment and the new DCI F5 walkover navigation system, the DTD team is able to retrieve undisturbed soil samples from beneath several layers of stacked waste drums and other debris in the landfill. The samples are then analyzed in a lab for a variety of environmental contaminants. The data is being used by environmental consultants to help characterize potential groundwater contamination that may be coming from the site.
Liner with soil sample
Although horizontal or directional sampling has been available for a few years, it tends to be underutilized. The cost is relatively high, due to the number of round trips that must be made in the bore in order to drill to the desired interval and then retrieve the sample. Despite this, directional environmental sampling provides access to potentially contaminated zones that might otherwise not be accessible to any other method.
By setting up along side of the landfill cells and using HDD to drill beneath the waste, multiple samples are being collected at 30 foot spacings, from 10 to 30 feet below the landfill base, and up to 60 feet below the landfill surface. Bores are up to 600 feet in length, with up to 14 samples per bore. DTD is one of very few HDD contracting firms with the qualifications to perform this level of environmental restoration work.
For more information, contact Mike Lubrecht, L.G., at 253-389-2707