LEACHING TEST STUDIES USING EXTRACTION PROCEDURE TOXICITY TEST AND TOXICITY CHARACTERISTIC LEACHING PROCEDURE

The hazardous waste disposal of residues of surface cleaning and repainting of steel bridges is costly. Costs can, however, be contained by ensuring proper classification of such wastes. This requires a reliable, precise method for determining the leachable metal concentration of various solid wastes. The results obtained through use of 2 widely employed leaching methods are reviewed in this investigation. The investigation compared the Extraction Procedure Toxicity Test (EPTox) promulgated to extract leachable organics and metals from solid wastes, and the Toxicity Characteristic Leaching Procedure (TCLP) that was proposed to replace EPTox. Metal concentrations in leachates from separate samples of various abrasive paint residues was measured. The study included evaluating the precision and reproducibility of the two methods using data sets obtained from various participating analytical laboratories. Round robin tests showed significant differences between the TCLP and EPTox methods. It was found that TCLP tests resulted in much higher concentrations of lead than did EPTox tests. These and other study findings are discussed.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1586080
• Corporate Authors:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Chong, S-L
  • Peart, J
  • Ormsby, W C
  • Griffith, M S
• Publication Date: 1990-12

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 241-245
• Serial:
  • Public Roads
  • Volume: 54
  • Issue Number: 3
  • Publisher: Federal Highway Administration
  • ISSN: 0033-3735
  • Serial URL: https://www.fhwa.dot.gov/publications/publicroads/
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Bridges; Costs; Environmental protection; Hazardous materials; Leaching; Maintenance; Paint; Toxicology; Waste disposal
• Uncontrolled Terms: Bridge maintenance
• Old TRIS Terms: Toxicological tests
• Subject Areas: Bridges and other structures; Environment; Finance; Geotechnology; Highways; Maintenance and Preservation; Materials;

Filing Info

• Accession Number: 00605160
• Record Type: Publication
• Files: TRIS, ATRI, USDOT
• Created Date: Mar 31 1991 12:00AM