Per- and polyfluoroalkylated substances (PFAS) are a group of manmade chemicals that may be found in aqueous film-forming foam (AFFF) used in some fire suppression systems, including portable handheld fire extinguishers.

PFOS and PFOA can also be formed by forming foam (AFFF), which is used to extinguish environmental degradation or by metabolism in liquid hydrocarbon fires (ASTSWMO 2015; EPA larger organisms from a large group of related 2016f; DoD SERDP 2014; Place and Field 2012).

At many of the AFFF-impacted sites, perfluorooctanoic acid (PFOA), PFOS, and perfluorohexane sulfonic acid (PFHxS) are the most prevalent PFAS detected. The phaseout of the longer chain PFAS by global manufacturers has resulted in quantifiable increase in shorter-chain concentrations and decreased concentrations of longer chains at some of the ...

2023年8月31日 · Two of the most common types of PFAS found in AFFF are perfluorooctane sulfonate (PFOS) and/or perfluorooctanoic acid (PFOA). These chemicals are human-made compounds that don’t occur naturally in the environment. Firefighters spray AFFF onto a fire, and it works by coating the fuel behind the fire and by cooling the fire.

AFCEC is taking a three-step approach – identify, respond, prevent -- to assess and respond to potential PFOS/PFOA drinking water contamination. In 2017, the Air Force completed enterprise-wide sampling of drinking water at all installations — stateside and overseas — to ensure drinking water supplies meet EPA guidelines.

2025年3月7日 · AFFF (aqueous film forming foam) is a low-expansion fire suppressive foam that may contain PFAS such as PFOA PFOA has been classified as a Persistent Organic Pollutant (POP) because of its non-biodegradable nature, its toxicity, and its tendency for bioaccumulation (the gradual accumulation of a toxin in an organism or food chain).

In 1970, the Air Force began using a legacy formula of AFFF which contained PFOS and PFOA to extinguish petroleum fires, commonly associated with burning aircraft. AFFF is the most efficient extinguishing method for petroleum-based fires and is widely used across the firefighting industry, to

2021年4月9日 · Per- and Polyfluoroalkyl Substances (PFAS) are a large class of chemicals found in many consumer products, as well as in industrial products such as certain firefighting agents called aqueous film forming foam (AFFF). PFAS is also found in essential use applications such as in microelectronics, batteries and medical equipment.

AFFF is a fluorinated foam and when mixed with water, the resulting solution achieves the interfacial tension characteristics needed to produce an aqueous film that spreads across the surface of a hydrocarbon fuel (petroleum greases, tars, oils, and gasoline; and solvents and alcohols) to extinguish the fire and to form a vapor barrier between t...

2021年12月7日 · Per- and polyfluoroalkyl substances (PFAS), including PFOA and PFOS, may exist as branched as well as linear isomers in AFFF samples, therefore both branched and linear isomers must be included in the determination of each method analyte.