Year 5 Research CCA-Treated Wood: Evaluating Toxicity During Disposal (Recently Funded)

Objectives  Evaluate arsenic concentrations (total and individual species) in leachates from CCA- treated wood  Evaluate toxicity of alternative-chemical treated wood

Methods, Phase I  Arsenic Speciation of Leachates from CCA- Treated Wood  Method Development, Cartridges for Samples Preservation  Lysimeter Installation & Leachate Analysis  TCLP and SPLP Tests & Leachate Analysis

Cartridge System LC-SCX anion-exchange cartridge LC-SAX DMA 0.45  m filter cation-exchange cartridge As(V), Elute with HCL MMA, Elute with HAc As(III)

Sample Analysis  HPLC-HG-AFS: As(III), As(V), DMA, MMA  HPLC-ICP/MS: All Arsenic Species

Methods, Phase II  Toxicity of the Alternatives  ACQ, CBA, CC, CDDC, CCA, untreated  5 Toxicity Tests, Microtox, Metplate, Invertebrate Test, Algal Assay, Hormonally Active Agents

Sample Processing n 8, 2”x4”x16 ft have been purchased n Analyzed to confirm treatment & retention n Samples then subjected to leaching tests n For this portion of the project samples also subjected to toxicity tests

Anticipated Benefits  Data Used to Determine the Impact of Current Disposal Pathways (Toxicity Focus)  Results Can Be Used With FDEP Risk Models  1:1 Comparison of Alternative-Chemical Treated Wood Products  Toxicity of Alternatives Versus That of CCA

Ash Problem Inventory Sorting Lab Ash Char & Trt Sorting Field Alt. Chem. Lit Review Alt. Chem. Leaching Alt. Chem. Toxicity Minnesota Lit Review Alt Chem & As Spec Deck Study As Spec Simulated As Spec LF Year 4 Year 5 Year 1 Year 2 Year 3 Year 3,Suppl

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