XDD’s Vice President Dennis Keane authored an article titled “PFAS Remediation: Where Are We Now?” published in Energy Empowered by the Midwest Energy Association (MEA). The article elaborates on the following topics: How the timeline for PFAS remedial technology development compares to petroleum compounds and chlorinated solvents. The source…
Environmental Investigations and Cleanups During the COVID-19 Crisis – Your compliance obligations with the US Environmental Protection Agency (EPA) and local agencies remain in effect.
XDD Environmental was contracted by CHA Companies to evaluate the impacts of varying temperature on the treatment of VOCs and SVOCs on soils via thermally enhanced soil vapor extraction (SVE) and / or thermally enhanced bioremediation. The original, more costly, design called for dewatering and high-temperature thermal conduction heating…
When: Thursday, November 8, 2018 Time: 1:00 PM – 5:00 PM, Onsite check-in begins at 12:30 PM NEW Location: Crowne Plaza Hotel, 1360 Worcester Street, Natick, MA Pricing: Members $200 | Non-members $350 Click Here To Register Instructors: Michael Marley, President, XDD Environmental Ellen Moyer, Environmental Engineer, Greenvironment, LLC Raymond…
WHEN: Part 1: Wednesday April 18, 2018 from 12:00 – 1:00 PM EDT Part 1 has concluded. Thank you everyone for attending. If you would like to download a copy of the presentation, please click here. Also a recording of the webinar is available here. Part 2: Wednesday April 25, 2018 from 12:00 – 1:00…
Thank you to all the registrants and attendees that participated in XDD Environmental’s Treatability Testing webinar. Find below a link to download the presentation slides and a video recording of the webinar. Click here to download the webinar slides Presentation Video: WHEN: Thursday March 29, 2018 from 12:00 – 1:00 PM EDT…
Michael Marley of XDD Environmental will be presenting in-situ chemical oxidation (ISCO), in-situ chemical reduction (ISCR), and bioremediation as a component of the NEWMOA. This workshop will provide information on planning and implementing various remedial technologies in combination, including: Site characterization & conceptual site model (CSM) Reagent delivery Thermal…
WHEN: Wednesday October 18, 2017 from 6:30 - 9:30 PM
WHERE: Amherst, Massachusetts
Click here for the workshop description (p. 10) and
full conference program.
Conference registration can be found here.
You are cordially invited to join us for an informative webinar covering the both ex- and in-situ remedial options for polyfluoroalkyl substances (PFAS). PFAS are contaminants of emerging concern that are increasingly being detected in ground, surface, and drinking water. PFAS are primarily associated with the manufacturing of fire fighting foams, carpeting, non-stick cookware, food wrappings, and are not naturally occurring in the environment.
The presentation will include:
Feel free to forward this webpage to colleagues/friends that might benefit from this free webinar.
Can't attend live? Please register anyway, we will be sending out a post-presentation email with a video link and slides (upon request).
PRESENTER and SPONSOR
Michael Marley, M.Sc., CT LEP
XDD Environmental
Mike Marley, president and co-founder of XDD Environmental, has over 35 years of experience in environmental and civil engineering. He has been at the forefront of developing design and application protocols for soil vapor extraction, sparging and in-situ chemical oxidation (ISCO) technologies. Mike is commonly used by both private industry and regulatory agencies to conduct peer reviews and testimony services both nationally and internationally. He reviews articles for several remediation journals and has published numerous articles and written chapters in several monographs and books on in-situ remediation.
PRESENTER
Ellen Moyer, Ph.D, P.E.
Greenvironment, LLC
As an environmental engineer with 30 years of experience, Ellen Moyer works on projects for federal agencies and Fortune 500 companies to clean up hazardous waste sites contaminated by a wide array of harmful chemicals. Moyer has an M.S. in environmental engineering, and a Ph.D. in civil engineering, and is a registered professional engineer. Moyer has authored three books "MTBE Remediation Handbook" and the just released "Our Earth, Our Species, Our Selves: How to Thrive While Creating a Sustainable World"
PRESENTER
Dr. Raymond G. Ball, P.E., L.S.P.
EnChem Engineering, Inc.
Dr. Ball, an environmental engineer, has 35 years of national experience with environmental issues related to organic and inorganic pollutants in the environment. He is a Registered Professional Engineer and a Licensed Site Professional in Massachusetts. Dr. Ball has served as a hazardous waste consultant to the U.S. Environmental Protection Agency on various remediation projects at military bases throughout the U.S. He has managed major remediation projects for industrial and government clients.
Thank you to all the registrants and attendees that participated in XDD Environmental’s PFAS webinar. Find below a link to download the presentation slides and a video recording of the webinar. Click here to download the PFAS presentation slides Presentation Video: Video of fire fighting foam being sprayed over a…
Perfluorinated chemicals (PFCs) and more specifically per- and polyfluoroalkyl substances (PFAS) are commonly found in cleaners, textiles, leather, paper and paints, fire-fighting foams, surfactants, and wire insulation. These persistent compounds have been found at trace levels to be in the environment and to bioaccumulate in wildlife and humans.
PFAS are generally carbon chains of varying length and can include varying amounts of oxygen, hydrogen, and nitrogen.
Photo Credit: NIEHS
Whether a compound is considered a "per" or a "poly" depends upon the following:
PFAS have been in the news both locally and nationally as an emerging class of groundwater contaminants. Additional information associated with the extent of groundwater impacts and the chemical properties of these compounds can be found here and here. The most common of these compounds in the news contain 8 carbon atoms and are perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS). While there are potentially thousands of PFAS, some other common and emerging compounds include:
Chemical properties generally common to PFAS are:
XDD Environmental has given numerous presentations and webinars associated with remedial options and unknowns for PFAS. A sampling of some of our presentations and webinars:
April 2018 Webinar on:
- PFAS Properties and Remedial Screening
- PFAS Remediation Details and Case Studies
2018 Amhest Soils Conference - Full Presentation
XDD Environmental's on-site treatability testing laboratory conducts original research into remedial options for PFAS. Currently XDD is partnering with GHD to evaluate several promising remedial approaches to PFAS using adsorption and ion exchange, including:
XDD played a critical role in project planning, execution and problem solving. They were instrumental to the success of the project.
| Property | PFOA | PFOS | Benzene |
| Chemical Formula | C8HF15O2 | C8HF17O3S | C6H6 |
| Molecular Weight(g/mol) | 414.09 | 500.13 | 78.11 |
| Boiling Point (oC) | 192.4 | 259 | 80 |
| Vapor Pressure (mm Hg at 25 oC) | 0.525 | ~0.002 | 86 |
| Henry’s Law Constant @ 25 oC (unitless) | Not measurable |
Not measurable |
0.225 |
| Koc | 115 | 371 | 79 |
| Solubility in Water (mg/L) | ~9,500 | 680 | 1,780 |
NM Not Measurable
PFOA Properties USEPA 2016
PFOS Properties USEPA 2016
