Скачать с ютуб Reductive Dechlorination with Concurrent Sequestration of PFAS and 1,4-Dioxane в хорошем качестве

Reductive Dechlorination with Concurrent Sequestration of PFAS and 1,4-Dioxane

Continuing AST’s focus on a combination of remedial techniques for weathered bedrock and competent bedrock, we are grateful to welcome Raymond Vaske, Senior Remediation Engineer, of Trihydro Corporation to present an in-depth look at the deployment of CAT 100 in the challenging Passaic Formation. This webinar encompasses the deployment of techniques discussed in Fall Webinar Series #1 with an advanced remediation technology for halogenated volatile organic compounds and emerging contaminants. The 3.85-acre confidential site, located in a heavy industrial/commercial area in New Jersey, includes an 82,500 square-foot manufacturing building where electroplating, and other operations were conducted for nearly 50 years. Site investigation activities conducted from 2020 to 2021 in overburden and bedrock groundwater detected high levels of chlorinated ethenes, including TCE, cis-1,2-dichloroethene, vinyl chloride, and 1,1-dichloroethene, as well as high levels of per- and polyfluorinated substances (PFAS) and 1,4-dioxane impacts to soil and groundwater. Regional geology in the vicinity of the site is characterized by an upper unit consisting of river alluvium and eolian deposits of Holocene Age, underlain by glacial unconsolidated deposits (clay, silt, sand, and gravel) of Pleistocene Age, and finally bedrock of the Passaic Formation, consisting of thin bedded shales, mudstones, and sandstones. This was a challenging geologic setting and a complex commingled plume. Yet, preliminary groundwater monitoring results indicate that reducing conditions have been engendered, as designed and intended, in all the injection areas with over 99 percent reduction in TCE in the target wells. This presentation will include a full evaluation of chlorinated ethenes, PFAS, and 1,4-dioxane, noting trends and exceptions. Complete details regarding site challenges, plus design and technology synergies, will be provided.