Environmental Engineering

Geosoils engineer conducting inspection at a mud drilling site
Soil vapor extraction system with electric blower, piping network, and acoustic enclosure installed for environmental remediation
Geosoils technicians preparing equipment for environmental testing
Soil gas sampling equipment including vacuum pump and stainless steel Summa canisters connected to a monitoring well for subsurface vapor investigation
Mud Drilling rig preparing to perform mud rotary drilling
Environmental field technician in hard hat and safety vest sampling a groundwater monitoring well at an industrial site, recording field measurements
Sub-slab soil vapor sampling through asphalt pavement at a commercial site using vacuum pump and Summa canister for UST contamination investigation
Environmental drilling crew in Tyvek suits and chemical-resistant PPE operating a direct push drill rig at a hazardous materials investigation site
Summa canister vapor sampling and PID monitoring at an active groundwater treatment site with above-ground air stripper tanks and safety perimeter

GeoSoils, Inc. delivers comprehensive environmental consulting and engineering services for complex contamination challenges—from initial site characterization to remedial design, implementation, and long-term management. Our team has deep experience in complex soil, soil vapor, and groundwater contamination issues, with particular expertise in chlorinated solvent sites, vapor intrusion mitigation, and large-scale remediation programs performed under DTSC, Regional Water Quality Control Board, and U.S. EPA oversight.

Services Include:

  • GeoSoils evaluates environmentally impacted properties to support redevelopment by identifying environmental constraints, assessing potential liabilities, and developing cost-effective remediation strategies. Our brownfield services integrate regulatory coordination, risk-based decision making, and engineering solutions to facilitate safe site reuse while minimizing project delays and financial uncertainty.

  • We perform ASTM-compliant Phase I & Phase II ESAs to support property transactions, financing, and regulatory compliance.

  • Our team conducts detailed subsurface investigations using drilling, direct-push methods, monitoring well installation, and advanced sampling techniques. We define contaminant distribution in soil and groundwater, evaluate hydrogeologic conditions, and generate data necessary to support conceptual site model (CSM) development and remedial design.

  • GeoSoils performs human health and ecological risk assessments in accordance with regulatory guidance (e.g., DTSC, EPA). We develop feasibility studies to evaluate remedial alternatives based on effectiveness, implementability, and cost, providing clear recommendations that support regulatory approval and project decision-making.

  • We design and implement groundwater monitoring programs, including well installation, development, gauging, and sampling in accordance with regulatory protocols. Our services include data management, trend analysis, and reporting to evaluate plume stability, track remediation progress, and support site closure strategies.

  • GeoSoils prepares complete remedial design packages, including 100% design drawings, technical specifications, and construction documents. We design systems such as soil vapor extraction (SVE), sub-slab depressurization systems (SSDS), in-situ chemical reduction (ISCR), and groundwater treatment systems tailored to site-specific conditions.

  • We provide construction management and field oversight for the installation of remediation systems, including drilling, piping, equipment installation, and system startup. Our team ensures construction activities are completed safely, efficiently, and in compliance with design requirements and regulatory expectations.

  • GeoSoils operates and maintains remediation systems with a focus on performance, not just regulatory compliance. Services include system monitoring, data evaluation, preventative maintenance, troubleshooting, and system optimization to maximize contaminant mass removal and reduce remediation timeframes.

  • We work closely with regulatory agencies—including DTSC, Regional Water Quality Control Boards, and U.S. EPA—to prepare technical reports, obtain permits, and ensure compliance with environmental regulations. Our team facilitates efficient communication and approval processes to keep projects moving forward.

  • We perform real-time air monitoring during excavation and remediation activities to protect workers and nearby communities. Our programs include perimeter monitoring, dust control verification, and compliance with site-specific health and safety plans and regulatory requirements.

  • GeoSoils evaluates indoor air conditions related to vapor intrusion and environmental contaminants. We conduct sub-slab and indoor air sampling, data analysis, and risk evaluation to support mitigation system design and ensure protection of building occupants.

  • We conduct soil vapor and sub-slab investigations to assess vapor intrusion risk associated with volatile organic compounds (VOCs) in accordance with DTSC, EPA, and Regional Water Board guidance. Our services include probe installation, soil gas sampling, and risk-based data interpetation to support development of mitigation strategies to protect indoor air quality.

  • We provide end-to-end construction management and field oversight for remediation system installation and remedial excavations, including drilling, piping, equipment installation, and system startup. Our team ensures all construction activities are completed safely, on schedule, and in compliance with design documents, technical specifications, and regulatory requirements—serving as the primary technical point of contact between contractors, clients, and oversight agencies from mobilization through project closeout.

  • We coordinate the characterization, handling, transportation, and disposal of hazardous and non-hazardous waste streams. Our team ensures full compliance with federal, state, and local regulations, reducing client liability exposuire, including proper documentation and manifesting.

  • GeoSoils' engineering capabilities include the design, installation, operation and optimization of SVE systems for the removal of volatile organic compounds (VOCs) from soil and soil vapor. Our systems are engineered to maximize contaminant mass removal, reduce vapor intrusion risk, and support site closure objectives under active regulatory oversight, including SCAQMD permitting and DTSC compliance.

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