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The Particulate Matter and Ozone NAAQS by Sonja Sax, Gradient - Hot Topic Hour December 10, 2010
Sonja Sax provided an update of the new proposed PM and Ozone NAAQS.
Revision Date: 12/10/2010
Tags: 221112 - Fossil Fuel 化石燃料, Gradient, Particulates, Ozone, NAAQS
Impact of Ambient Air Rules for PM2.5 and Ozone Webinar - Part 2 - Hot Topic Hour December 10, 2010.
Three speakers discussed PM2.5 stationary source sampling methods, an update of the new proposed PM and Ozone NAAQS and finalization of new source review (NSR) regulations related to the annual and 24-hour PM2.5 NAAQS.
Revision Date: 12/10/2010
Tags: 221112 - Fossil Fuel 化石燃料, Gradient, All4, Avogadro Environmental Corp., PM2.5, Ozone, NAAQS
Coal Ash Ponds and Ash Disposal Issues Webinar - Part II - Hot Topic Hour January 14, 2011
Two very enlightening days of discussions on the CCR issue. The extended period for public comments on the proposed rule on Coal Combustion Residuals (CCR) (commonly referred to as coal ash) concluded on November 18, 2010. According to the speakers we can expect a final rule promulgated in 2011 or 2012. The big question is “Will the final rule classify CCR as special wastes subject to regulation under Subtitle C of RCRA (Resource Conservation and Recovery Act) when destined for disposal in landfills or surface impoundments (essentially hazardous waste) or as non-hazardous wastes regulated under Subtitle D of RCRA?” If EPA decides to classify CCR as “hazardous,” under Subtitle C, EPA would create federally enforceable requirements for ash management, including waste generation, transportation and disposal. If CCR is declared non hazardous, under Subtitle D, EPA would only mandate a set of minimum national standards and leave it up to state governments and citizen litigation to enforce them.
Revision Date: 1/14/2011
Tags: 221112 - Fossil Fuel 化石燃料, Gradient, Clyde Bergemann, Frontier GeoSciences, Pneumatic Conveyor, Conveying, Testing
Ari Schoen Lewis, Environmental Toxicologist and Manager of the Toxicology Team at Gradient Corporation, indicated that human health risk analysis is important in shaping the regulations. EPA is anticipating more input. One complication is the importance of emerging toxicological assessments of the chemical constituents in CCRs (e.g., arsenic, cobalt and chromium). Because the risk is now deemed higher, some constituents have assumed new importance.
Revision Date: 1/14/2011
Tags: 221112 - Fossil Fuel 化石燃料, Gradient, Testing
Ari discussed “Human Health Risk Assessment and the Regulation of Coal Combustion Residues (CCRs).”
Revision Date: 5/4/2012
Tags: 221112 - Fossil Fuel 化石燃料, Gradient, Testing, Flyash Pond, Regulation, Wastewater Treatment
Flyash Pond and Wastewater Treatment - Part II - Hot Topic Hour May 4, 2012
Status of proposed federal and state regulations and what will need to be done to comply with the regulations and systems and technology for eliminating wet ash handling and slurry storage in ponds. Reduction of wastewater volume as well as treat wastewater generated.
Revision Date: 5/4/2012
Tags: 221112 - Fossil Fuel 化石燃料, Barr Engineering, Carbonxt, CH2M Hill, Gradient, Activated Carbon, Testing, Regulation, Flyash Pond, Wastewater Treatment