Walker-Hill Environmental, Inc. (WHE) provides a wide range of remediation services for sites impacted with contaminated soil and/or groundwater. WHE’s staff of project managers, field supervisors, and technicians have extensive experience in the remediation and environmental services arena. WHE’s remediation construction management team is experienced in directing site operations, enforcing site specific health and safety requirements, and quality assurance/quality control (QA/QC). WHE personnel have project experience in a wide variety of treatment technologies and is currently licensed as remediation contractors in Louisiana and Mississippi. Certifications and Licenses are available upon request. In addition, WHE is also licensed to perform underground storage tank closures in Louisiana and Mississippi.
WHE personnel have worked extensively in remediating (in-situ and ex-situ) impacted soil and groundwater at Resource Conservation and Recovery Act (RCRA) and Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) sites. WHE personnel have also worked extensively in remediating soil through excavation, treatment, and backfill at numerous Mississippi Department of Transportation and Development (MDOT) sites. WHE has successfully provided excavation, transportation, and disposal of impacted soils and materials for numerous clients.
WHE has successfully performed in-situ treatment of impacted soils using biotreatment technology, as well as, in-situ and ex-situ groundwater remediation using single and dual phase extraction systems. WHE offers complete installation, operation, and maintenance services to these extraction systems.
WHE has successfully remediated numerous sites impacted with various organic, inorganic, and metal constituents. WHE’s remediation capabilities include solidification/stabilization, land treatment (biological), clay capping, in-situ and ex-situ single and dual phase extraction systems, etc.
WHE has a staff of project managers and field professionals that specialize in providing environmental and geotechnical drilling services, including monitoring well installation, water well installation, soil sampling, aquifer testing, groundwater remediation system installation, and pump installation, operation, and maintenance. WHE has several drill rigs equipped for typical drilling techniques such as Sonic drilling, wet rotary, hollowstem auger, and direct push technology (Geoprobe®), to assist in specialized subsurface investigations.
The Sonic Drilling application is the fastest and the most advanced drilling technique today. Holes are drilled, cored and cased by rotating and vibrating the rod, core barrel, and casing at resonant sonic frequencies. The Sonic drilling technique provides continuous, highly representative, relatively undisturbed core samples that are collected into clear plastic sleeves, minimizing the loss of volitale organic compounds and reducing the risk of exposure. Sonic drilling applications are five times faster than hollow stem auger methods and the faster drilling rate translates to much lower cost per foot on site, thus overall project costs are also reduced due to the minimization of the oversight cost.
Each hollowstem auger drill rig is also equipped for conversion into wet rotary techniques which allows WHE clients the option to continue drilling operations when hollowstem augering is no longer feasible. Each rig is equipped with shelby tube and split spoon sampling devices for environmental and geotechnical purposes.
Direct Push Tecnology “pushes” tools and sensors into the ground without the use of drilling to remove soil to make a path for the tool. Geoprobe® machines rely on a relatively small amount of static (vehicle) weight combined with percussion as the energy for advancing a tool string. Direct push tools do not remove cuttings from the probe hole but depend on compression of soil or rearrangement of soil particles to permit advancement for the tool string. Direct push tools are advanced as far as possible using only the static weight of the carrier vehicle. Percussion is applied as required when probing through sands, gravels, hard pans, high friction clays, tills, fill materials, and surface frost.
WHE’s staff has provided drilling services for numerous ADEM, Louisiana Department of Environmental Quality (LDEQ), and MDEQ groundwater protection Trust Fund projects, RCRA and CERCLA facility investigations, and United States Environmental Protection Agency (EPA) Superfund sites in Louisiana, Mississippi, and Oklahoma. In addition, WHE has worked extensively on geotechnical investigations for road, bridge, and building construction, as well as, hydrogeological investigations at solid waste landfills.
Walker-Hill Environmental is capable of being your horizontal well installation specialist.