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

Minutes of Technical Advisory Group Meeting Held March 9, 1998





Agenda for Tag Meeting

1. Welcome
2. Presentation of Research Results
        -Disposal Quantities/Management Options Solo-Gabriele
        -Construction and Demolition Recycling Facilities Townsend
        -Update on Questionnaires/Statistics Penha/Calitu
        -Update on Wood Waste Study Tolaymat
3. Discuss Draft of Technical Report
4. Plans for Future Research Solo-Gabriele
5. Discussion
6. Adjourn

Present:

Kevin Archer, Product Development Manager, Chemical Specialties Inc.

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

Keith Drescher, Environmental Specialist, Florida Power and Light

Bill Gay, Wood Preserving Group Manager, Langdale Forest Products

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

Catalina Santamaria, Undergraduate Student, U.Miami, Environmental Science Program

John Schert, Executive Director, Florida Center for Solid & Haz. 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.

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The meeting began at 10:30 pm and ended at 12:30 pm. The meeting started late due to poor weather conditions which delayed participant's arrival. The following items were presented.

1. Welcome

TAG members introduced themselves by stating name and affiliation.

John Schert described the research objectives of the Florida Center for Solid and Hazardous Waste Management (FCSHWM) and distributed an information packet describing the Center (copy attached).

Lew Temares, Dean of the University's College of Engineering, welcomed the TAG committee to the University.

2. Presentation of Research Results

Dr. Helena Solo-Gabriele presented the results and conclusions of the first year study. Primary conclusions were that quantities of CCA treated wood disposed will increase in the future, and that today most of the CCA treated wood waste is disposed through the Construction and

Demolition (C&D) waste stream. A considerable amount of the wood (including CCA treated wood) within this waste stream is recycled as process boiler fuel. Current disposal practices for CCA treated wood will not be a viable option in the future. Alternatives should focus on waste minimization and disposal-end management. Improved sorting and ash treatment technologies were considered priorities and will be the focus of next year's study.

Dr. Timothy Townsend described the sample collection and analytical procedures for determining the fraction of CCA treated wood (FCCA) found in recycled wood at C&D recycling facilities. He provided a handout with updated values for FCCA (attached). The updated values are lower than those reported in the draft report. Values of FCCA ranged from 0 to 25% with an average of 6%. These updated values incorporated corrections to the assumed density of Southern Yellow Pine and in the metal content of CCA treated wood at a 0.25 lb/ft3 retention level.

Jennifer Penha, Vandin Calitu, and Thabet Tolaymat provided brief updates concerning their respective projects.

Questions

Bill Gay raised concerns about the service life values utilized when forecasting disposal quantities. He mentioned that the useful service life of CCA treated products can be up to 50 years. Service life of CCA treated wood in residential versus industrial applications were discussed. The research team agreed to investigate the service life issue further prior to completing the final technical report.

Gus Staats commented about the drawbacks of borates for treating wood. John Schert inquired about the relative use of borates and CCA in New Zealand. Kevin Archer mentioned that both chemicals are used extensively in that country.

Keith Drescher inquired about recycling options for CCA treated utility poles. He mentioned that Florida Power and Light has experimented with sawing poles for its reuse in landscaping applications.

Kevin Archer requested further elaboration concerning the ASOMA equipment. Two instruments sold commercially by ASOMA Instruments were described as well as their applications within the disposal sector.

3. Plans for Future Research

Dr. Helena Solo-Gabriele presented an outline for the second year study. Funding has been approved for this study by the FCSHWM and matching funds are provided by Florida Power and Light. The second year study is separated into three phases: Phase I, ash leaching characteristics, Phase II, sorting study, and Phase III, evaluation. During phase I, ash samples including those containing CCA-treated wood-ash, will be subjected to TCLP and SPLP procedures, as well as to a series of other solvents as per classical soil testing protocols. The purpose of the solvent extraction study is to identify a solvent that can remove metals from wood ash. The ultimate intent is for recycling of the CCA chemical from the solvent. During the sorting study, phase II, two sorting technologies will be tested for applicability within the wood disposal sector. These technologies include a chemical stain test and use of energy dispersive X-ray fluorescence (EDX). During phase III, the results of phases I and II will be evaluated with respect to practical limitations and regulatory issues.

4. Discussion of Draft Technical Report

Dr. Helena Solo-Gabriele mentioned that she will submit the draft report for review by the FCSHWM by the end of March. The final version, after FCSHWM review, will be completed by early May. Dr. Solo-Gabriele prefers to have comments by the end of March but will accept comments through mid-April. Comments can be mailed to her attention or faxed to (305)284-3492. A copy of the final report will be mailed to all TAG members once completed.