GeoRestoration, Inc. (GRI) is a full-service environmental consulting firm for your site investigation and remediation needs. We specialize in portable high vacuum soil vapor extraction (SVE) and dual-phase extraction (DPE) systems for remediating contaminated soil, soil gas, and groundwater.
Experienced Personnel • Hands On Management • Built In Integrity
GRI offers services that are scientifically sound and regulatory compliant. Our rates are the most reasonable in Northern California due to our smaller size and lower overhead. Projects adhere to set schedules and are managed to give our customers the results they want within a reasonable time frame. Our experience includes bulk fuel plants, airports, hospitals, service stations, school districts, government facilities, commercial businesses, and private residences.
Soil, Soil Gas, and Groundwater Remediation
GRI offers portable high vacuum soil vapor extraction (SVE) and dual-phase extraction (DPE) systems. SVE and DPE are proven methods for treating chlorinated solvents (e.g., dry cleaners, metal plating shops) and hydrocarbons (e.g., gasoline, diesel, related fuels), and remain one of the most trusted methods for remediating these contaminants from soil, soil gas, and groundwater. Many fuel-related sites can be remediated in less than 12 months of operations. Chlorinated solvent sites are more challenging, and may ultimately require vapor intrusion mitigation systems (VIMS) under new construction; however, regulatory agencies often want as much contaminant mass removed as feasible prior to accepting VIMS, and SVE/DPE is among the most effective methods to remove contaminant mass.
SVE remediates soil and soil gas simultaneously, and DPE additionally remediates groundwater simultaneously. Also, SVE and DPE can influence larger areas than injection methods. Sparging or injection can also be combined with SVE or DPE to further speed up remediation efforts.
The cost to remediate small to medium sites using GRI portable SVE/DPE systems can potentially be less than the cost to design, permit, and install a permanent system alone, before any operations costs are considered. GRI rates are based on run time only, so you only pay when operating, and only operate when it is productive. This is ideal for pilot tests, pulsed remediation, sites too large for one fixed system, and combining technologies. Sometimes, pulsed remediation is most efficient, such as operating only during the dry season, and GRI systems make that feasible. You do not pay rental or installation costs for a system that does not work, is not productive, or when you need to stop for sampling. It is our incentive to ensure our equipment is working properly.
Operations with GRI portable systems can begin with as little as 3-days’ notice within the jurisdictions of the Bay Area Air Quality Management District (BAAQMD) and Monterey Bay Air Resources District (MBARD). Permitting a new system can take up to 12 months with the BAAQMD, but GRI systems have active permits for various sites with BAAQMD and MBARD. We can also operate within some parts of the Yolo-Solano Air Quality Management District and San Joaquin Valley Air Pollution Control District. If groundwater treatment is necessary, GRI can obtain permits with local water treatment facilities for disposing of treated groundwater.
GRI systems are capable of extracting up to 350 cubic feet per minute of soil vapor, treating up to 20 gallons per minute of water, applying a vacuum up to 15 inches of mercury, and extracting from up to eight wells simultaneously. If additional capacity is needed or for larger sites, multiple systems can be operated simultaneously to speed up remediation efforts. Our systems also meet residential noise ordinance limits.
GRI can work with your environmental consultant providing support services or conduct total turn-key site remediation.
Site Investigations
GRI has conducted numerous soil, soil gas, and groundwater investigations at underground storage tank sites, aboveground storage tank sites, automotive repair shops, dry cleaners, metal plating shops, manufacturing facilities, refineries, and other contaminated sites. GRI can also prepare the required work plans and summary reports, coordinate with subcontractors, obtain necessary permits, communicate with regulatory agencies, and provide other technical support.
Soil, Groundwater, and Soil Gas Sampling
GRI employs fully-trained, HAZWOPER certified technicians for soil, groundwater, and soil gas sampling. This includes soil sampling by hand auger, drill rigs, or excavators; groundwater sampling with submersible pumps, low flow methods, or bailers; active soil gas samples using isopropyl alcohol or helium tracer gases within shrouds; or passive soil gas samples using various passive samplers. GRI can collect samples for the following:
- Total petroleum hydrocarbons as gasoline (TPHg), diesel (TPHd), motor oil (TPHmo), and others
- Volatile organic compounds (VOCs)
- Semi-volatile organic compounds (SVOCs)
- Dioxanes
- Polychlorinated biphenyls (PCBs)
- Per- and polyfluoroalkyl substances (PFAS)
- Pesticides (OCPs)
- Herbicides
- Metals (Title 22, chromium-6, etc.)
- Fixed gases (oxygen, helium, etc.)
- Groundwater indicator parameters (pH, dissolved oxygen, electrical conductivity, oxidation reduction potential, etc.)
- Others (cyanide, nitrates, sulfides, etc.)
Groundwater Monitoring
For extended monitoring projects, GRI can provide all phases for a groundwater monitoring program—including sampling plans, conduct field sampling, provide project management, and the preparation and submittal of the required reports.
Other Services – GRI’s trained staff can provide:
- Environmental property assessments (Phase 1 reports);
- Site screening investigations prior to property development;
- Tank removal support (third party sampling, project management, and reporting);
- Waste disposal (characterization, project management, and reporting);
- Excavation dewatering (permitting and water treatment);
- Facility Closure including preparation of a closure plan, project management, verification sampling, waste management/disposal coordination, and closure reports); and
- Underground Storage Tank Cleanup Fund reimbursement request preparation.