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PFAS Remediation for Construction Dewatering

Mitigate PFAS and Other Contaminants at Construction Sites with Emergency and Mobile Solutions

Construction site water caused by excavation must be pumped away from the site and treated properly. This remediation process typically requires the removal of suspended solids or micro contaminants. This must be done before effluent can be introduced into the municipal system or a waterway. Construction sites are increasingly finding levels of per- and polyfluoroalkyl substances (PFAS) in this groundwater. 

PFAS are man-made chemicals known for their resistance to heat, water, and oil. Often referred to as "forever chemicals," they do not easily break down in the environment or the human body, raising potential health concerns.

Treat Water for Contaminants at your Construction Site 

Building materials have been shown to emit PFAS, particularly in products used in roofing, painting, and related jobs. Essential construction related materials like paints, sealers, adhesives, coatings, and wiring contribute to the issue. While builders and installers may do their best to mitigate their own PFAS output, contamination can still occur in the groundwater. This could even be caused by other nearby construction jobs or previous work done in the area. Unfortunately, whatever the source, it is the current builder's responsibility to treat the water for PFAS and other compounds before reintroducing it into municipal water systems. 

Construction companies need to be aware of not only PFAS but also VOCs, heavy metals, and inorganic compounds among other contaminants. When performing dewatering, it is crucial to reach legally required contaminant levels. Xylem has solutions available for any type of compound found in the groundwater at your construction site. The chart below details the most common compounds found in construction site water and the remediation media necessary to treat them. 

Compound

Remediation Media

Perfluorooctane Sulfonic Acid (PFOS), Perfluorooctanoic Acid (PFOA), and other per- or polyfluoroalkyl substances (PFAS)

PFC Removal (carbon and resin treatments)

Trichloroethylene (TCE)

Activated Carbon Media/Air Stripper

Dichloromethane (DCM)

Activated Carbon Media/Air Stripper

1,2,3 - Trichloropropane (TCP)    

TCP Remediation

Volatile Organic Compounds (VOC)

Activated Carbon Media/Air Stripper

BTEX (benzene, toluene, ethylbenzene, xylene)

Activated Carbon Media

Dioxane

AOP/Resin

Other Organic Compounds

Activated Carbon Media

Arsenic

​GFH® Granular Ferric Hydroxide Media

Cadmium

​SCU™ Trace Metal Removal Media

Copper

​SCU™ Trace Metal Removal Media

​Perchlorate or Cyanids

Ion Exchange Resin

Selenium

Biological Treatment


Xylem has one of the largest, most versatile and responsive mobile water treatment fleets in the country. Our combination of pre-treatment, vessels, media or resins can effectively mitigate PFAS and other contaminants at any flow rate and in nearly any location, regardless of footprint or weather. We offer emergency mobile units, as well as short-term and long-term solutions to dewater your site and bring your water into compliance. 

 

From testing your water to designing the most effective treatment solution we can respond quickly to meet or exceed your treatment goals