Generation, Use, Disposal, and Management Options for CCA Treated Wood

Minutes of Technical Advisory Group Meeting Held October 23, 1997




AGENDA for TAG Meeting

1. Introduction

2. Research Progress
        -University of Miami Helena Solo-Gabriele
        -University of Florida Timothy Townsend
3. Research Updates
        -C&D Recycling Facilities Thabet Tolaymat
          -Wood Treater and Wood Boiler Questionnaire Jennifer Penha
        -Historical Record Search for Wood Production Statistics Vandin Catilu
4. Open Discussion
5. Adjourn

Present:

Vandin Calitu, Graduate Student, U.Miami, Dept. of Civil/Environ. Engrg.

Kenneth Cogan, Technical Representative, Hickson Corporation

Keith Drescher, Environmental Specialist, Florida Power and Light

George Varn Jr., Project Manager, Varn Wood Products

Jennifer Penha, Graduate Student, U.Miami, Dept. of Civil/Environ. Engrg.

Rhonda Rogers, Florida Center for Solid and Hazardous Waste Management

Helena Solo-Gabriele, Assistant Prof., U.Miami, Dept. of Civil/Environ. Engrg.

August Staats, Manager of Environmental Services, Osmose Wood Preserving Division

Thabet Tolaymat, Graduate Student, U. Florida, Dept. of Environ. Engineering Sci.

Timothy Townsend, Assistant Prof., U. Florida, Dept. of Environ. Engineering Sci.
____________________________________________________________________________

The meeting began at 10:00 pm and ended at 12:10 pm. The following items were presented.

1. Project Overview and Status

Dr. Helena Solo-Gabriele summarized the research results to date. Wood treating industry statistics were presented. Given production trends, quantities of CCA treated wood disposed should increase significantly in the future. The status of the questionnaires (wood treating industry and wood burning facilities) and interim results of the construction and demolition (C&D) waste stream studies were presented. An overview of the management plan for CCA wood waste was presented. The overview included options for reuse, recycling, and waste minimization.

Questions:

Mr. George Varn expressed a concern about the differences in the 1996 wood production estimates. The first two methods extrapolated production numbers for Florida from values for the Southeastern Region. These methods were based upon void volume ratios and based upon the number of plants. The third method was based upon the results from our wood treater questionnaire. The wood treater questionnaire provided a significantly lower production value (based upon ft3) than the other two methods. Mr. Varn provided possible causes for errors in the extrapolation method.

Mr. Kenneth Cogan provided corrections and comments concerning the incisor method, modified full cell treatment process, vapor phase treatment, and rapid fixation process.

2. Status Reports

Ms. Jennifer Pehna provided a status report of the wood treater and wood boiler questionnaires. Mr. Vandin Calitu has compiled most of the statistical reports for the wood treating industry. Mr. Calitu described the status of this analysis.

3. Interim Results for C&D Study

Dr. Timothy Townsend described the methodology for estimating the amount of CCA treated wood entering C&D landfills and recycling facilities in Florida. The method is based upon mass balance considerations. Samples have been collected from several C&D recycling facilities and these samples are currently undergoing analysis. Mr. Thabet Tolaymat described the sampling scheme, analytical procedure, and the preliminary results to date. Preliminary results indicate that between 5 to 20% of the wood waste recycled is composed of CCA.

4. Discussion

Dr. Solo-Gabriele asked the TAG committee for feedback concerning where the research project should focus efforts the second year. Members of the TAG expressed concerns on disposal issues and impacts that it may have upon the treating industry. Dr. Solo-Gabriele mentioned that improved sorting methods may help the disposal sector to address issues associated with CCA treated wood waste. She describe the ASOMA Instrumention which is based upon X-ray fluorescence, and the potential for applying this technology for sorting purposes. Mr. Ken Cogan mentioned another alternative which is a chemical stain used by the treatment industry to check the depth of CCA penetration. Mr. Cogan agreed to send some of the chemical to the research team.

Mr. George Varn asked if there have been technologies developed to treat the ash generated by combusting CCA treated wood. Mr. Cogan mentioned that burning CCA is advantageous from a volume reduction point of view. He mentioned that there may be opportunities to develop additives prior to burning wood that may help reduce TCLP. The need for economical and practical alternatives was emphasized during discussions.