GCI takes pride in designing the most efficient treatment programs possible for our clients. Our experienced staff of geologists, chemists and engineers examines each site to determine the appropriate oxidant for the site, the volume of oxidant required for the treatment, the contaminant mass present at the site, and the overall treatment program design. The following steps must be completed prior to the implementation of a treatment program:

• Preparation of Initial Estimate (IE) or Proposal
• Contracting
  
  

Initial Estimates

Clients interested in using the Geo-Cleanse® Process for remediating contaminants at a particular site are first requested to fill out a site summary form. This form along with treatment area maps, soil and groundwater analytical data, and representative soil boring logs should be provided to GCI. With this information, GCI can provide our clients a free budgetary cost for their site. Typical turnaround time for an initial estimate is about one week. The initial estimate gives our clients a preliminary design for their site which includes the oxidant type, the oxidant volume required, a calculation of contaminant mass, and the number of injectors required for the treatment program. GCI determines the best oxidant for use on a site based on information provided to GCI by our clients and our previous work experience.

Proposals

If a client wants a firm design and cost for a treatment program, they typically issue GCI a request for proposal (RFP). In order for GCI to prepare a responsive proposal, the following information is requested, at a minimum:

• General Site Info
• Maps with buildings
• Site history
• Soils data (saturated zone)
• Lithologic descriptions
• Boring logs
• Most recent analytical data
• Groundwater data
• Hydraulic conductivity and porosity
• Geochemical parameters (hardness, mineralogy, etc.)
• Most recent analytical data

Proposals typically take between one and two work weeks for completion and are reviewed by several members of GCI’s staff.

Oxidant Requirement

The required quantity of oxidant for a site is based upon the amount of contaminant mass present at the site and the type of contaminant. For Fenton’s reagent applications, the following dosages are typically used:

• TCE: 4 lbs of oxidant per lb of contaminant
• TCA: 10 lbs of oxidant per lb of contaminant
• BTEX: 10 lbs of oxidant per lb of contaminant
• PAHs: 20 lbs of oxidant per lb of contaminant

Contracting

Once the approach provided in the proposal is accepted, a contracting phase begins. GCI develops its contracts in three main ways, depending on our client’s needs.

Time and materials
This type of contract invoices the client for the actual time and materials utilized on a project, and typically contains a not to exceed amount.

Unit price for oxidant delivered
For certain sites, this type of contract can be developed. In this contract, GCI will develop a cost per gallon of oxidant injected and invoice our client accordingly.

Performance Based Contracts
In certain cases, GCI develops pay-for-performance contracts to accommodate the desires of our clientele. The costing for this type of treatment program is designed so that the price for treatment is based on the amount of reduction achieved by GCI. Therefore, there is a stepped payment for percentage reductions. This type of contract is only created for highly characterized and delineated sites with an accurate calculation of contaminant mass.