Toxicity characterizing leaching procedure

For applications in the rain trap system, the results of the EPA s toxicity characterization leaching procedure (TCLP) indicate that none of the tire products tested exceeds proposed TCLP regulatory levels. Most compounds detected are found at trace levels, (near method detection limits), from 10 to 100 times less than TCLP regulatory limits and U.S. EPA drinking water standard maximum contaminant level (MCL) values. The Florida Department of Environmental Regulation released its final report on tire teachability in potential usage environments. The study, which evaluates the leachability of shredded tires in different aquatic environments, finds that scrap tires pose no harmful effects when used in applications that are above the water table [14]. 

The physical properties of lead and several of its compounds are listed in Table 3-2. Lead readily tarnishes in the atmosphere but is one of the most stable fabricated metals because of its corrosive resistance to air, water, and soil (Howe 1981). A waste that contains lead or lead compounds may (or may not) be characterized a hazardous waste following testing by the Toxicity Characteristic Leaching Procedure (TCLP) as prescribed by the Resource Conservation and Recovery Act (RCRA) regulations. 

Solids from the munitions treatment unit (MTU) include munitions bodies and burster wells as well as residue (e g., paint chips) generated during periodic cleaning of the MTU. Decontaminated munitions bodies will be sent offsite and can be recycled for scrap metal under Colorado regulations (PMACWA, 2006).2 The characterization of residue includes an analysis for toxicity characteristic leaching procedure (TCLP) metals. It is subsequently drummed and shipped offsite to an appropriate TSDF. 

T.G. Townsend, S. Mussen, Y.-C. Jang, and I.-H Chung, Characterization of lead leachability from cathode ray tubes using the toxicity characteristic leaching procedure, Florida Center for Solid and Hazardous Waste Management, Report 99-5, Gainesville, FL, 1999. 

US-EPA provides two leaching test methods. One is the Toxicity Characteristic Leaching Procedure (EPA SW 846 Method 1311), and is called the TCLP for short. The other is the Synthetic Precipitation Leaching procedure (EPA SW—846 Method 1312), and is called the SPLP. The TCLP is intended to simulate dissolution of waste materials inside a landfill, and is the only leaching test specified by the regulation for characterization of the hazardous waste (40 CFR 261.24 Toxicity Characteristic, waste code D004-D043) under the Resource Conservation and Recovery Act (RCRA). 

Townsend, Timothy G. Characterization of Lead Leachability from Cathode Ray Tubes Using the Toxicity Characteristic Leaching Procedure State University System of Florida, Gainesville, Florida, December 1999. 

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