Soil and Groundwater Remediation

Site screening and risk assessment results may indicate remedial action is necessary to reduce contaminate concentrations or to block exposure pathways. Since 1999, Earth Systems has successfully remediated contaminated sites with the right blend of science, service, technology, and relationships with regulators and subcontractors. Treatment strategies that we routinely design, implement, and utilize to obtain regulatory closure include:

  • Air Sparging
  • Soil Vapor Extraction
  • Dual Phase and Multi-Phase Extraction
  • Natural Attenuation Monitoring
  • Risk Based Corrective Action
  • Phyto-remediation
  • Dig and Haul
  • Excavation and On Site Incineration
  • Impermeable Slurry Wall Barriers

Engineering Design

The best remedial alternatives are cost effective, simple to implement, and as certain as possible to achieve the cleanup goal. Earth Systems combines talented people and an effective management system to ensure all remediation tasks are completed in a cost-effective and timely manner than minimizes risk and long term liability.

Just because it worked before doesn’t mean there isn’t a better or more cost effective method of remediation available. Our remediation engineers know they must evolve to remain successful. To ensure our project teams stay on the cutting edge of today’s technology, Project Engineers participate in continued education programs that expand their skill sets.

Cost Controls

Managing and controlling costs begins with the development of work plans and project cost estimates. During work plan development, the Project Manager and Portfolio Manager work together to determine the labor, supplies, equipment, and subcontracting requirements for the project. Earth Systems reduces costs while maintaining the integrity of our work product by developing work plans, as follows:

  • Minimize mobilizations
  • Remove unnecessary laboratory analysis
  • Use defendable data gathered by others
  • Reduce the generation of investigation derived wastes.

Our Project Managers receive monthly financial statements itemizing labor and other direct costs that have accrued against their project budgets. Cost expenditures are compared to project estimates to confirm that the remaining budget is sufficient for the remaining work. If expenditure variances are identified, the Project Manager advises the Portfolio Manager, provides analysis of the budget conditions, and implements a corrective plan to ensure the project is brought back into budgetary conformance.

Project Progression

Earth Systems uses several organizational advantages to progress throughthe various steps of a project more swiftly than our competitors. Our relatively flat management style, our commitment to building relations with clients, and our focused approach to cleaning sites up quickly (rather than relying on annual O&M budgets as a steady revenue stream) allows us to progress through project phases quickly and achieve closure in a timely matter.

Earth Systems evaluates all options for your environmental issues and applies practical science to solve your problem. Don’t let our competition fool you–most jobs don’t need to be made into “science projects.” Rather, they should be solved quickly and addressed cost effectively.

Communication & Relationships with Government Agencies

The attitude Earth Systems maintains when communicating with regulatory agencies is a direct reflection of our internal commitment to representing our clients with pride and passion, while valuing the opinions of the government case manager. Earth Systems’ communication with regulatory agencies is essential to keeping projects on-time and within budget and efficiently moving through project phases toward closure. Earth Systems project managers are continually counseled by senior level managers on relationship building and conflict resolution to ensure that the government site manager is respected for his or her opinions and recommendations, but yet assuring that our clients’ best interests continue to be taken into account.

The main aspects of our communication approach with regulators include:

  • Engaging in frequent dialogue to ensure that the case manager always has timely information
  • Freely exchanging information and ideas with the case manager to allow for open communication
  • Holding opinions that are backed by definitive data
  • Meeting in person to cement our relationship and show a commitment that goes beyond routine phone conversations

Relationship building with regulators is a key component to Earth Systems’ project management model and the resulting goodwill is passed onto our client in many ways including:

  • Ability to function and relate on a friendly, “peer” level with the case manager, rather than engaging in a vertical hierarchy that can breed resistance and conflict.
  • Established level of trust that allows for the benefit of the doubt during decision making by the case manager.
  • Tendency to be more responsive since the relationship is cordial and amiable, not adversarial.

Soil and Groundwater Remediation

In-Situ Bioremediation-Sages Dry Cleaners

Earth Systems is directing cleanup of the Sages Dry Cleaners site under a contract with the Florida Department of Environmental Protection’s Bureau of Waste Cleanup. The site has residual PCE DNAPL and associated dissolved CEs in three zones. Earth Systems recommended and is implementing In-Situ Bioremediation (ISB) that consisted of injecting a slow-release electron donor substrate. The ISB optimizes natural attenuation to control costs better than other more aggressive treatment technologies and is less disruptive to current site use. ISB increases the rate of DNAPL dissolution while controlling plume migration via reductive dechlorination. ISB is appropriate for this site because of the residual source, relatively homogenous and permeable lithology, and sufficient buffer zone to insure no impact to potential receptors. In addition, ISB has worked at most sites in Florida.

AS / SVE – Former Kerr-McGee Pipeline

A buried pipeline transferred fuel from ships at the Jacksonville Port Authority (JPA) dock, under the JPA shipping container storage yard, and to the landlocked Kerr-McGee bulk storage terminal. Earth Systems completed assessment of a leak from the pipeline, a source removal to remove free product and the associated pipeline, and design and installation of an AS / SVE system.

Earth Systems smoothly coordinated the assessment and system installation work under highly sensitive JPA security procedures and rigorous construction standards specific to the container storage area. The pipeline discharge site was granted a No Further Action status and the AS / SVE system was re-used at another site.

Bioremediation – Hogan & Associates

Hogan & Associates received a Notice of Violation (NOV) for improper storage of haz-ardous substances. Earth Systems subsequently detected, assessed, and remediated soil and groundwater contaminated with low levels (a high of 82 µg/L) of dissolved Trichloroethene (TCE). Dissolved TCE degradation products cis-1,2-Dichloroethene (cis 1,2-DCE) and Trans 1,2-DCE were detected at concentrations below DEP Maximum Contaminant Levels (MCLs).

The depth to water was approximately 4 feet below land surface (ft bls). The surficial aquifer beneath the site consists of fine sands with varying amounts of shell material to approximately 30 ft bls. Sandy clays are present from approximately 30 ft to approximately 50 ft bls, where hard clay was encountered.

Earth Systems efficiently used direct push technology and a mobile laboratory to evaluate the hydrogeology and define the soil and groundwater impacts underlying an area of approximately 3,500 sq. ft. Low levels of contamination were detected in vadose zone soil and in groundwater extending to approximately 25 feet bls.

Approximately 60 tons of impacted soil were excavated and disposed offsite. The presence of degradation products indicated ongoing microbial remediation. The site conditions were conducive to effective injection of bio-enhancing reagents to accelerate the ongoing microbial activity. The reagents were injected with direct-push technology with tight spacing (15 ft centers) to ensure good reagent distribution. Three injection events were spaced two months apart.

Following 5 quarters of post remedial monitoring, a Site Rehabilitation Completion Order was issued for the site.