Comparative Treatability Studies
XDD Environmental can test several technologies simultaneously to determine which remedial option will best meet our client’s goals.
Comparative treatabilitiy studies will identify the strengths and weaknesses of each technology under site conditions to increase the reliability of the decision-making processes. These studies include evaluation of known approaches to a site pollutant (such as increasing pH in the case of metal migration), to evaluating existing products (such precipitation products for metal migration).
XDD’s experience in treatability lab testing includes:
- Metal stabilization
- In situ chemical reduction
- Surfactant-enhanced treatment
- Oxygen-releasing products
- Nutrient or biostimulation products
In addition, XDD incorporates our own field implementation experience into the design to increase the usefulness of the results. Design and dosing considerations are compared to field feasibility to ensure the most useful information is gathered to aid in decisions and design of field implementation.
XDD performs treatability testing and microcosm studies to evaluate the site specific feasibility and to develop field-scale design parameters for all common in situ remediation technologies:
- In Situ Chemical Oxidation:
- Catalyzed Hydrogen Peroxide
- Activated Persulfate
- In Situ Chemical Reduction:
- Zero Valent Iron (ZVI)
- Bi-Metallic Particles
- Metal Sulfides
- In Situ Bioremediation
- In Situ Metals Stabilization
- pH adjustment
- metals sorption
- metals precipitation
- metals co-precipitation
XDD Environmental will customize our treatability services to meet you site-specific needs. Our most recent approaches include:
- Thermal enhanced soil vapor extraction
- Thermally enhanced bioremediation
XDD uses a methodical approach for our site evaluations. These evaluations are often aided by our state of the art treatability laboratory, confirming that the optimal remediation design has been selected for each site.
Reductive Dechlorination Cultures
Through the acquisition of Bioremediation Consultants, Inc (BCI) methods and equipment, XDD has acquired over 22 specific cultures. These cultures can be grown in site-specific groundwater and provided for bioaugmentation and include:
- Chlorinated Ethane and Ethene reducing cultures.
- Neutral to low pH (5.7)
- Low to high chloride and sulfate concentrations
- Chlorinated benzene reducing cultures.
- BCI’s polychlorinated bi-phenyl (PCB) reducing culture.
In-House Analytical Capabilities
- Natural attenuation parameters
- Dissolved gases such as methane, ethene, and ethane by gas chromatography (GC)
- Volatile chlorinated compounds by GC
- Alcohols, glycols, and water soluble ethers by GC
- Organic acids such as formate, lactate, and acetate by capillary ion electrophoresis and by ion chromatography
- Molecular hydrogen by reduction gas analysis
- Anions such as nitrate, nitrite, phosphate, chloride and sulfate