XDD Environmental is recognized nationwide for our expertise and experience with in situ remediation technologies. XDD Principals have been focused in the design and implementation of remedial technologies since subsurface remediation first gained traction in the early 1980’s. Consider the cost of doing the same job twice. In situ remedial failures can be identified and avoided with proper treatability testing, design, and an experienced staff that understands how to adjust to site conditions during implementation. Our reputation as remediation specialists within the industry drives our clients to seek out our services, especially at high profile or technically difficult sites – see our case studies for a sampling of these successful projects.
- How Often Has XDD Met Project Goals? 97%
- In Situ Projects: Change Project Course to Avoid Costly Remedy: 52%
- Number of Projects that Came to Us with Previous In Situ Failures: 39%
XDD has applied over 2.5 million pounds of oxidant at over 80 sites.
We provide A to Z services with regard to the design, testing and implementation of in situ chemical oxidation (ISCO) technologies and include:
- Initial conceptual evaluations
- Bench testing
- Post-application evaluations
XDD environmental engineers pioneered soil vapor extraction (SVE) and air sparging (AS) with the first U.S. application of air sparging in 1989 and later authored the American Petroleum Institute’s Air Sparging Guidance Document. XDD is nationally recognized in the design, evaluation and implementation of SVE and AS for a variety of contaminants of concern.
XDD provides A to Z services with regard to the design, testing and implementation of in situ chemical Reduction (ISCR) technologies. Each of these services can be used individually, but the best results are obtained when these services are used together as part of an integrative approach.
Our engineers and scientists have experience in the following chemistry systems:
- Zero Valent Iron (ZVI)
- Bi-Metallic Particles
- Metal Sulfides
XDD provides A to Z services with regard to the design, testing and implementation of in situ enhanced bioremediation technologies. We now provide in-house biotreatability microcosm studies in support of our designs, offering a complete ISB evaluation and design package. Each of these services can be used individually, but the best results are obtained when these services are used together as part of an integrative approach.
XDD has over 22 specific bioaugmentation cultures. These cultures can be grown in site-specific groundwater 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.
- Polychlorinated biphenyl (PCB) reducing culture.
XDD has been providing monitored natural attenuation (MNA) evaluations and sampling services throughout our history. Monitored Natural Attenuation (MNA) is often a preferred option relative to active in situ remediation as it is less invasive, uses existing subsurface processes, and has a relatively lower cost. XDD offers our clients and partners a full range of services, which include our in-house lab and ability to provide microorganisms for bioaugmentation.
Sometimes groundwater extraction and treatment (also known as pump and treat – P&T) makes the most sense. XDD is not invested in pushing a singular in-situ remedial technology and therefore have designed, installed, and operated a number of remedial systems involving a hydraulic capture component.
XDD has experience in the evaluation and implementation of several thermal remedial technologies. XDD’s thermal experience has allowed our clients to address environmental liabilities for soil impacts with relatively low vapor pressures (semi-volatile organic chemicals and metals) and in soils where climatic conditions make unmodified SVE impracticable.