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With NESHAP for portland cement settled, EPA turns to brick kiln emissions

Sources: Environmental Protection Agency; CP staff

In its latest round of national emission standards for hazardous air pollutants (NESHAP), EPA proposes lower limits for mercury and non-mercury metals, plus hydrogen and chlorine gases from clay brick tunnel (continuous curing) kilns, coupled with target startup and shutdown periods. The agency also envisions work practice standards for more specialized periodic kilns, which are heated up to 2,000° F, then left to cool for several days. Tunnel kilns are typically fired by natural gas or sawdust; periodic kilns, coal.

Read more: With NESHAP for portland cement settled, EPA turns to brick kiln emissions

Languishing 2009-13 coal ash recycling rates reflect regulatory uncertainty

Sources: American Coal Ash Association (ACAA), Farmington Hills, Mich.; CP staff

According to ACAA’s “Production and Use Survey,” 51.4 million tons of coal combustion products (CCP) were beneficially used in 2013 —down from 51.9 million tons in 2012 and well below the 2008 peak of 60.6 million tons. In the closely watched category of fly ash consumed in concrete mixes, utilization increased only slightly to 12.3 million tons, up by 577,705 tons over 2012, but still below 12.6 million tons in 2008.

Read more: Languishing 2009-13 coal ash recycling rates reflect regulatory uncertainty

Fly ash marketers, users spared ‘hazardous material’ stigma in EPA rule

Sources: American Coal Ash Association (ACAA), Farmington Hills, Mich.; Environmental Protection Agency; CP staff

After five and a half years of proposals, reworking and review of 450,000-plus comments, the EPA issued a final rule on coal combustion residuals (CCR) from utility power plants, strengthening management guidelines for impoundment- or landfill-bound material while supporting responsible recycling practices best exemplified in ASTM C618-grade fly ash processing and marketing.

Read more: Fly ash marketers, users spared ‘hazardous material’ stigma in EPA rule