Soil and Groundwater Remediation


FREY has extensive experience in designing, installing and operating soil and/or groundwater remediation systems using vapor extraction, high vacuum dual- phase extraction, groundwater pump-and-treat, air sparging, ozone sparging, and bioventing technologies. We have designed, installed and operated remediation systems at a variety of sites including service stations, truck stops, dry cleaners, and various industrial facilities. In nearly all situations, the remediation activities are conducted concurrently with, and do not affect, normal business operations.


As part of the remediation design process, FREY evaluates previous subsurface investigation activities, and designs appropriate remediation feasibility tests to assess the effectiveness of various appropriate remedial technologies. Based on the feasibility testing, the most cost-effective remedial method(s) is selected, and a Corrective Action Plan (CAP) is then submitted to the regulatory agency for approval. FREY understands that the remediation feasibility testing phase of a project is critical to producing a timely and effective remediation to achieve regulatory case closure. As such, FREY makes a strong effort to design and implement appropriate feasibility testing that considers all Site-specific elements of the project, including geology/hydrogeology, potential preferential subsurface conduits, seasonal groundwater fluctuations, etc., that may adversely affect future remediation efforts.

Operation and Maintenance

Just as important as designing and conducting appropriate remediation feasibility testing, is efficiently operating and maintaining the remediation system once installed. FREY project managers and remediation technicians are in constant communication on a given project in order to ensure that the systems are properly operated and maintained, and also to continually modify the system setup to maximize system efficiency. FREY understands that significant cost-savings are realized by maximizing system up-time and efficiency since the overall clean-up time can be significantly reduced.


FREY has obtained numerous regulatory case closures on remediation projects by diligently adhering to our approach of intelligently designing, installing, operating and maintaining our remediation systems. References can be provided upon request.

Stormwater Management

FREY has conducted stormwater audits at various sites to assess compliance with federal, state, and local stormwater regulations as applicable. Recommendations are provided in the audits as warranted for implementation Best Management Practices (BMPs) which include protocol, procedures, and/or controls to minimize the potential for stormwater impacts from the facility. Recommend BMPs range from education and training, to designing and constructing devices to contain, and in some instances treat, stormwater run-off.

Spill Prevention Control and Countermeasure (SPCC) Plan

In order to assist with compliance of United States Environmental Protection Agency pollution prevention regulations (40 CFR Part 112), or more stringent state or local regulations as applicable, FREY prepares SPCC Plans as required. SPCC Plans are intended to guide facility personnel in preventing spills of hazardous substances that could impact stormwater, and for performing safe, efficient, and timely response in the event of a spill or leak. As part of the SPCC Plan preparation, FREY conducts a site audit prior to preparing the SPCC Plan. Any recommendations regarding deficiencies and their mitigation can be given to the client prior to preparation of the SPCC Plan.

Stormwater Pollution Prevention Plan (SWPPP)

FREY prepares site-specific SWPPPs, which describe the activities to be implemented to identify risk level and sources of pollution at a site, and the best management practices to prevent, control and/or reduce pollutants in stormwater at the site during and post-construction to the maximum extent practicable. FREY has qualified personnel on staff (QSD/QSP Certified) to develop and implement SWPPS for construction or industrial sites as required.

Other Stormwater Compliance Issues

Should a state or local jurisdiction have more stringent stormwater compliance requirements than mandated by the Federal EPA, FREY can assist with implementation of such requirements, including, but not limited to, preparation of Water Quality Management Plans (WQMPs), Stormwater Management Plans (SWMPs), and interpretation of specific Waste Discharge Requirements (WDRs).

Methane Assessments / Mitigation


FREY has conducted methane assessment and/or mitigation work throughout Southern California, and is an approved methane assessment and mitigation contractor with the Orange County Fire Authority and other Southern California cities.

FREY is experienced at working on the methane assessment and, if required, methane mitigation aspects of commercial and residential projects with clients in an efficient and cost-conscious manner in order to expedite receipt of building permits. If a passive or active methane mitigation system is required, we can expeditiously design and install the system concurrently with building construction.

Asbestos-Related Service

Asbestos Consulting

In the area of asbestos consulting, our staff members have experience ranging from simple building surveys to large-scale asbestos abatement projects. Our asbestos consulting staff is highly trained with many years of experience in the areas of asbestos sampling; operations & maintenance (O&M); and asbestos abatement.

Asbestos Surveys

FREY has experience in conducting asbestos surveys at a large number of facilities including: residential buildings; public school buildings; office buildings; and large industrial facilities. Our staff is AHERA trained and certified to work in public school buildings. FREY has provided service to real estate companies, insurance companies, legal firms, property managers, the oil industry, and many other unique and diverse companies.

O&M Plans

We have prepared numerous O&M plans for the management of asbestos-containing materials which are left in-place at occupied buildings. Depending on our client’s objectives, it is sometimes preferable to leave asbestos-containing materials in a building. Our O&M plans can be tailored to handle highly specific materials and situations at specific buildings. The O&M plans are designed to guide the activities of building owners, property managers or maintenance personnel in the safe management of asbestos-containing materials.

Asbestos Abatement

When it is time to remove asbestos-containing materials from a building, FREY has the experience and knowledge to get the job done at a minimal cost while protecting building occupants, abatement workers, and the environment. FREY can manage your abatement project to ensure that all applicable regulations are followed, while keeping costs under control.

We have working relationships with a variety of experienced subcontractors to augment our capabilities in the areas of asbestos abatement, construction and industrial hygiene

Free Product Recovery and Removal

In cases where free product (also known as light, non-aqueous phase product) is present on the groundwater surface, FREY will immediately implement a free product recovery and removal program. The objective of the program is to reduce the potential for further impacts to groundwater, and to reduce the potential for further lateral and vertical migration of contaminants in groundwater.

Typically, the free product recovery and removal program consists of manual bailing of wells containing free product at a maximum frequency of once a month. In some cases, the mass of free product beneath a site is extensive enough to warrant installation of an automatic free product recovery system, which continually purges free product from wells. In either case, the collected free product is collected in DOT-approved 55-gallon drums or an appropriate aboveground tank, then profiled, manifested, transported and disposed of as a hazardous waste.

Groundwater Monitoring and Sampling

Groundwater monitoring and sampling procedures are performed to establish groundwater flow direction and area of impacted water.

Groundwater monitoring and Sampling activities consist of:

  • Gauging the wells for depth to water used to obtain a calculated groundwater level;
  • Purging of at least three well volumes of groundwater from the groundwater monitoring wells;
  • Sampling of the grounwater for laboratory analysis;
  • Data evaluation and report preparation

Subsurface Investigations

Subsurface investigations are used to assess the lateral and vertical extent of impacted soil at your property.

  • Preparation of a Site specific Health and Safety Plan;
  • Procurement of permits from the regulatory agency;
  • Drilling of soil borings a around the area of suspected impacted soil;
  • Collection of soil samples for soil lithologic classification, in-field screening for undifferentiated volatile organic compounds and laboratory chemical analysis;
  • Groundwater monitoring well or remedial well installation;
  • Survey the newly installed groundwater monitoring or remedial wells for elevation and location;
  • Evaluation of data and report preparation.

Phase I Investigations

The objective of Phase I environmental site assessments is to identify conditions at the Site that may indicate environmental impairment which may adversely impact teh value of the property.

Phase I environmental site assessments consist of, but is not limited to:

  • A Site Inspections;
  • A visiual review of properties which bound the Site;
  • An interview with a person knowledgeable of the Site’s history of operations;
  • A review of files for the Site Maintained by the local regulatory agencies;
  • A review of aerial photographs for the Site and surrounding Sites;
  • A review of fire insurance maps and reverse phone directories;
  • A review of a government agency database report specifically prepared for the Site, and;
  • Preparation of a report summarizing the findings of the information presented above.

Phase I environmental site assessments prepard by FREY will generally conform to the “Standards for Appropriate Inquiry” prepared by the United States Environmental Protection Agency / American Society for Testing and Materials E1527-05.

Greenhouse Gas (GHG) Emissions Modeling

FREY can assist clients with Greenhouse Gas (GHG) emissions modeling for future projects. FREY utilizes California Emissions Estimator Model (CalEEMod) a state wide land use emissions computer model developed by ENVIRON International Corporation, the South Coast Air Quality Management District (SCAQMD) and other air districts for use in California.


The CalEEMod software uses the CalEEMod land use emissions inventory model to estimate greenhouse gas and criteria pollutant emissions under particular scenarios involving construction, land area, and other sources. It has been designed specifically for California, and uses California-specific road and construction emissions factors. The model estimates emissions from the property resulting from demolition and construction activities, area source emissions (emissions from the property), and operational (vehicle) emissions (emissions from vehicular traffic). CalEEMod can be used for air quality analyses for California Environmental Quality Act (CEQA) documents, National Environmental Policy Act (NEPA) documents, compliance with local air quality rules and regulations, and early project planning.


CalEEMod calculates the estimated direct and indirect GHG emissions generated during project construction and the estimated yearly direct and indirect GHG emissions generated through Site use. Indirect emissions result from actions at the Site that cause GHG emissions at a source that is owned and controlled by another entity, such as a power plant. The indirect GHG emissions were calculated for electricity use, natural gas use, water use, and solid waste disposal.

Emission Mitigation

When the estimated emissions results reported in screening analysis mode do not meet regulatory thresholds, then the next tier of modeling can be performed utilizing mitigation factors and additional Site data to reduce estimated emissions. The CalEEMod model allows the use of a wide range of emission mitigation measures, from simple input values to detailed Site-specific project data. Detailed project data is typically more complex and requires the collection of additional Site data including: phased-construction use, specific emission source data, construction equipment exhaust data, fugitive dust mitigation, equipment to be used during Site development, traffic study data, temperature data, and other factors.

Environmental Compliance Management

Oversee removal and disposal of asbestos-containing building materials from the Site buildings. Removal and disposal of Site buildings, the Cal-Haz, or RCRA-Haz impacted concrete slabs were removed, profiled and hauled to an appropriate landfill.

Oversee excavation of impacted soil to remove soils with reported concentrations of VOCs and/or heavy metals that exceed regulatory limits. Impacted soil was stockpiled, profiled, and hauled to appropriate disposal facilities as Cal-Haz, or RCRA-Haz waste.

Oversee spill Prevention Control and Countermeasure (SPCC) Plan and Stormwater Pollution Prevention Plan (SWPPP). Monitored and mitigated issues in connection with SCAQMD air quality compliance.