February 2011

Iowa Universities Announce Results of Groundwater Analysis at Coal Ash Disposal Site

(Iowa State University 2-7-2011) The results of voluntary groundwater testing beneath a quarry where the University of Iowa, Iowa State University and the University of Northern Iowa deposit coal and biomass ash have shown levels of the sampled constituents all well below state and federal standards.
 
Levels for many constituents were so low that laboratory equipment had difficulty detecting anything but trace and statistically insignificant amounts.
 

Concrete Producers Paid for Substituting Supplementary Cementitious Materials Instead of Portland Cement

(Aggregate Research 2-4-2011) Several innovative concrete producers are earning financial incentives through Cool Climate Concrete (C3), a greenhouse gas offset program, for substituting supplementary cementitious materials (SCMs) for portland cement during concrete production in the United States. These producers receive an incentive of $4 per metric ton of avoided carbon dioxide (CO2) emissions resulting from reducing portland cement use beyond established baselines.