Drilling Methods
Drilling Methods
Several of our drills utilize innovative direct push methods used around the world, as well as conventional solid and hollow stem auger systems, standard split-spoon samplers, automatic drop hammers for geotechnical SPT, and diamond core systems for coring in rock formations.
Geoprobe® Soil Gas Implants
Our line-up of Geoprobe® drill rigs have been efficiently and cost-effectively installing implants for soil gas sampling for many years. Geoprobe® implants are stainless steel screens that can be easily inserted down the bore of drilling probe rods and quickly anchored at depth. Geoprobe® implants are constructed of double woven stainless steel wire screen and all end fittings are stainless steel.
Geoprobe® MC5 Soil Sampling System
The MC5 Soil Sampling System from Geoprobe Systems® is the toughest direct push soil sampling system. The MC5 is a single, heavy duty steel tube, 2.25″ diameter and 60″ length, with a clear PVC sample liner inserted for discrete or continuous soil sampling. The MC5 does not remove any soil cuttings from the borehole. The absence of soil cuttings reduces costs associated with the removal of soil waste. It is one of the primary direct push methods that Strata Drilling Group utilizes for highly efficient drilling of soil cores that are encapsulated in PVC liners for immediate analysis or for easy transport and storage.
Geoprobe® Dual Tube Soil Sampling System
The Dual Tube Soil Sampling System from Geoprobe® uses two separate rod systems to perform soil sampling: there is an outer drive casing which is advanced incrementally into the soil, and an inner rod string which is cycled in and out of the casing to retrieve soil samples. Dual tube systems collect continuous soil samples using a cased hole thereby eliminating cross-contamination of soil samples and enabling the option of installing a monitoring well. Our drillers primarily utilize the DT35 Dual Tube Soil Sampling System to drill continuous 2.0″x60″ soil cores encapsulated in a PVC liner.
Geoprobe® Clear PVC Soil Liners Tested Nondetect for 52 PFAS Compounds
Geoprobe® submitted samples of the clear PVC soil liners utilized by direct push methods, to Oregon State University. The PVC soil liners were analyzed for 52 PFAS compounds, including PFOS and PFOA. The PVC liners tested nondetect for all 52 compounds.
The original article link is provided below:
Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, United States
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Conventional Methods
Conventional hollow stem auger (HSA) drilling combined with the use of standard split-spoon samplers is both an environmental and geotechnical drilling method. HSA drilling enables Standard Penetration Tests (SPT) to obtain N-values from split-spoon samplers at pre-determined depths for geotechnical compaction information. Simultaneously, the split-spoon samplers collect soil samples for both geotechnical and environmental analysis all from the same borehole. In addition, a properly constructed water well can be installed under our licenses with a documented well record.
Conventional solid stem auger drilling is a fast, cost-effective method for creating boreholes in stable, cohesive soils, primarily for geotechnical investigations and shallow drilling. The process involves a rotating solid-stem auger with continuous flights that lift soil to the surface as it cuts into the ground. After reaching the desired depth, the auger is removed, and a sampling tool is lowered into the open hole to collect soil samples or perform further tests.
Past Drilling Sites
Port Hope, Ontario
For many decades, Port Hope was a location in Ontario with processes that led to the occurrence of soil and groundwater contamination across many areas, including natural landscapes, commercial properties, and residential neighborhoods. For several years, Strata Drilling Group utilized many different configurations of drill rigs and specialized drilling equipment for drilling programs conducted throughout the Port Hope area. Strata Drilling Group also provided a team of drillers that transferred their residence to Port Hope during the years that required intensified and uninterrupted drilling. Our drillers played an integral role across multiple sites in the Port Hope area with state-of-the-art drill rigs and an inventory of locally stored drilling equipment enabling rapid deployment of the most suitable drilling techniques to overcome complex site conditions in many residential areas, commercial sites, and vacant lands. Active drilling sites often included occupied residential properties that were located across many neighborhoods. Working with clients in these residential areas meant respecting and understanding the sensitivity of the nature of the drilling activities endured by many homeowners in Port Hope. Planning and drilling equipment selection was essential before starting any residential work in order to provide the least disruptive path to project completion.
