TarGOST - Tar-Specific Green Optical Screening Tool Brochure

At Dakota Technologies, we understand the challenges involved in detecting and characterizing PAH-laden contaminants at former manufactured gas plants (MGPs) and wood treatment facilities. Our Tar-specific Green Optical Screening Tool (TarGOST®) is designed specifically for delineating the non aqueous-phase liquids found at MGP and creosote sites. TarGOST can be deployed by all forms of direct push across a wide range of site conditions. TarGOST benefits include:Real-time data—allows for “on-the-fly” ?determination of the next bore-hole location, leading to better bounding of source termNo samples—true in-situ information ?without derived waste, carryover, or handling and storageFast—production rates of 200 to ?500 feet per day (typical direct push conditions) Flexible—percussion (i.e. Geoprobe®) ?or cone penetration test (CPT) Color-coded logs—the ultimate in ?qualitative and semi-quantitative information at-a-glance High data density—one inch/data point ?Sensitive—low detection limits and ?baselines that only laser-based systems provideSelective—fluorescence time-domain ?waveforms offer positive identification and interference rejectionMGP waste and creosote NAPLs contain large amounts of naturally fluorescent PAHs, but UV-based fluorescence systems fail to consistently detect them. The TarGOST system was specifically designed to respond to these challenging materials and precisely log their response versus depth.Our innovative TarGOST mates with direct-push platforms such as Geoprobe and CPT. TarGOST is percussion-drivable — a Dakota Technologies, Inc. exclusive The TarGOST system uses a sapphire window in the side of the direct push probe to conduct front-face fluorescence measurements as the probe is advanced into the soil with nearly any DPT platform. Fluorescence and / or scattered light are directed up-hole to be analyzed. Responses are indicated in real-time on a graph of signal versus depth. The graphs also display colorized logs and waveforms to aid in interpretation.TarGOST®Tar-specific Green Optical Screening ToolDakota Technologies, Inc. Telephone: (701) 237-4908www.dakotatechnologies.comRandy St. Germain, Presidentstgermain@dakotatechnologies.comW (701) 237-4908 • Cell (701) 793-9708TarGOST Data—Conceptual Site Model (CSM) Successful remediation and treatment systems require detailed knowledge of NAPL location and distribution. TarGOST provides this knowledge at unprecedented speed, detail, and efficiency. Sampling simply can’t compete with TarGOST’s production rates. Since the first full-scale site characterization project in June 2003, the TarGOST system has been successfully applied and validated across a wide range of site conditions and deployment platforms, including Geoprobe and CPT. Barge deployment is now common, and continues to be a growing deployment platform for TarGOST.High Resolution TarGOST LogsTarGOST data is typically acquired at 1-inch vertical resolution—orders of magnitude higher than what is possible with traditional sampling methods. TarGOST simply doesn’t miss stringers or narrow seams of NAPL. The high-resolution logs simplify field work and eliminate delays and remobilizations. They supply the user with real-time data ideally suited for incorporation into an adaptive site characterization plan, such as those recommended by EPA’s TRIAD.TarGOST®Tar-specific Green Optical Screening ToolDakota Technologies, Inc. Telephone: (701) 237-4908www.dakotatechnologies.comRandy St. Germain, Presidentstgermain@dakotatechnologies.comW (701) 237-4908 • Cell (701) 793-9708The end result of a TarGOST boring is a high-density, non-subjective electronic data log (left) readily incorporated into 2D and 3D conceptual site models. Accurate source term models lead to knowledgeable decisions, accurate treatment and removal designs, and realistic cost estimates—saving time and money.