Tri-State Drilling Technologies, Inc. specializes borings to support a wide variety of geotechnical, environmental, and regulatory projects. Our capabilities include portable drilling for limited-access areas, allowing accurate subsurface investigation even in confined or indoor spaces. We perform monitoring well and piezometer installations to assess groundwater levels and support long-term environmental monitoring. Our team conducts sanitary and drywell test borings to evaluate soil suitability for drainage and wastewater systems, as well as Suffolk County Department of Health (DOH) I/A OWTS soil borings and percolation testing for innovative onsite wastewater treatment system approvals. In addition, we offer rock core sampling to retrieve continuous bedrock cores for detailed geological analysis. With experienced staff and specialized equipment, T.S.D.T. ensures precise, dependable results for a wide range of subsurface applications.