23 JULY 2024 WorldWide Drilling Resource® Horizontal Soil Sampling Adapted from Information by Directional Technologies, Inc. (DTI) Horizontal drilling techniques offer significant advantages when delineating contamination, particularly on environmental projects where contamination exists in limited-access locations. By navigating horizontally beneath buildings, drill operators can target specific zones with precision, obtaining soil samples from areas which might be missed or difficult to access using conventional techniques. Where traditional vertical techniques may struggle to capture the lateral extent of contamination accurately, horizontal drilling allows for collection of samples along an aerial plane, enabling a more thorough assessment of the spread and distribution of contaminants beneath the surface. This spatially detailed information is crucial for effective remediation planning and execution. Horizontal soil sampling is an indispensable tool when delineating contamination at a site; however, the site conceptual model can be enhanced further when used in tandem with downhole sensing technologies. DTI is fortunate to have worked with TarGOST (Tar-specific Green Optical Screening Tool) creator Dakota Technologies on projects where developing a full understanding of contaminant delineation was paramount. The technology functions by advancing a sensor down the borehole to take high-density fluorescence measurements, which rapidly assess the hazardous NAPL (nonaqueous phase liquid) concentrations in real time. These measurements can be used to make real-time design adjustments in the field and develop highresolution conceptual models during the post-analysis phase. When implemented simultaneously with horizontal soil sampling, a fully comprehensive understanding of the contaminant distribution throughout the site is achieved. DTI was approached by environmental consultants to utilize horizontal soil sampling to help confirm the potential release of contaminants at a site in the southeastern U.S. A concrete-lined wastewater storage basin developed cracks, allowing the potential for contaminated media to drain into the subsurface. Samples needed to be acquired from beneath the basin to confirm if, or to what extent, contamination had leaked. The alternative solution would have resulted in the costly and time-consuming process of draining the basin, mobilizing a vertical drill rig into it, then coring through the thick concrete at multiple locations to achieve discreet samples. Instead, two horizontal bores were drilled from the upland areas adjacent to the basin and three soil samples were collected from each alignment at a depth of just one foot below the concrete. TarGOST Date - Conceptual Site Model. DIR PACIFIC NORTHWEST 2024 Dealmakers Pulstar Mfg / Preferred Pump & Equipment Brennon (C) of United Crown Pump & Drilling in Hayden, Idaho, took delivery of a new pump hoist from Marty and Levi with Pulstar / Preferred Pump at the 2024 Pacific Northwest Ground Water Expo. Ryan (CR) of Aquatech Well Drilling & Pumps in Sedro Woolley, Washington, celebrated the purchase of a new pump hoist from Horizon Hoist in Rhome, Texas. Horizon Hoist
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