The TCLP (Toxicity Characteristic Leaching Procedure) is
designed to determine the mobility of elements and compounds in
liquid and solid waste byproducts. Over time, water and other
liquids percolate through landfills. The percolating liquid
often dissolves components of the solid waste in the landfill.
The resulting “leachate” that is produced may pose public and
environmental health risks because of these contaminants. The
TCLP analysis simulates landfill conditions and determines
concentration at which the contaminants identified by the US EPA
are present in the leachate. The EPA/TCLP protocol provides
standards that are considered thresholds of toxicity for each of
these contaminants. The TCLP analysis simulates landfill
conditions and determines which of the contaminants identified
by the U.S. EPA are present in the leachate and their
concentrations. Mercury captured by Amended Silicates is
extremely stable. TCLP performed on neat fly ash, fly ash with
Amended Silicates and fly ash with PAC have yielded