(800) 486-3575 112 Corporate Drive Suites 1 & 2 Portsmouth, NH 03801
Menu

History

Founded in 1997, XDD, LLC is an environmental consulting and engineering firm that focuses on the evaluation, design and implementation of remedial technologies. Since our founding, XDD has earned a national reputation for its remediation expertise and the ability to:

  • develop site exit strategies
  • evaluate remedial alternatives
  • negotiate regulatory options
  • conduct laboratory and field pilot testing, and
  • design and implement a variety of full-scale soil and groundwater remediation technologies.

XDD utilizes each of these steps to better meet our client’s goals of achieving regulatory closure, reducing risk, and minimizing long-term costs.

  • XDD was selected because we wanted someone who would listen and understand the issues at the site. Bringing XDD into the project didn’t save short term funds, but it did save 5 years of extra time on the project…

    Benne C. Hutson, McGuireWoods LLP

  • One of their biggest advantages is that XDD gets the results they say they will, on schedule, and within budget.

    Christopher Gasinski, Tampa Electric

  • I really can’t think of anything that I’d have you do better. Other than get cheap permanganate, but I know that’s not under your control.” – with respect to in situ chemical oxidation design.

    Derek Pinkham, Tetra Tech, EC Inc.

ACHIEVEMENTS & RECOGNITION

  • Conducted in-situ remediation activities at 100’s of sites and have successfully injected >2 million pounds oxidants
  • First application of air sparging in US in 1989
  • Authored American Petroleum Institute’s Air Sparging Guidance Document (1996)
  • First application of pure oxygen biosparging in 1994/1995 (EPA Region 1 Superfund Site)
  • First in US to apply stabilized hydrogen peroxide
  • First in US to apply activated persulfate and combined permanganate and persulfate (DUOX)
  • Authored USEPA Innovative Technology Evaluation Report Xpert Design and Diagnostics’ (XDD) In Situ Cehmical Oxidation Process Using Potassium Permanganate
  • Co‐authored four chapters in the SERDP/ESTCP manual, In Situ Chemical Oxidation for Groundwater Remediation (Siegrist, et al.)
  • Contributed to ITRC Technical and Regulatory Guidance for In Situ Chemical Oxidation of Contaminated Soil and Groundwater (2005)
  • Conducted EPRI‐sponsored study for the treatment of MGP residuals with In Situ Chemical Oxidation for the utility industry
  • Co‐Principal Investigator in DOD SERDP-funded research on potential for metals mobilization and prevention during ISCO (ER‐2132)

Contributor, Soil Vapor Extraction using Radio Frequency Heating (Lowe, et al.)

  • Developed application of radio frequency heating (RFH) to accelerate SVE and biodegration processes
  • Assisted EPA with developing soil gas monitoring protocols for Assessment of Vapor Intrusion in Homes Near the Raymark Superfund Site Using Basement and Sub-Slab Air Samples (2006)
  • Successful treatment of emerging contaminants such as PFOS, PFOA, and 1,4-dioxane for our industrial clients
  • Contributed to in situ chemical oxidation component of Chlorinated Solvent Source Zone Remediation (2014)

As a firm that employs highly-skilled remediation experts, XDD qualifies as a small business enterprise under the NAICS codes 541620 (Environmental Consulting Services) and 562910 (Remediation Services). XDD can provide turn‐key solutions or support your engineering team, and we have a very successful track record of teaming with consulting firms on numerous private and government projects.