1. On-line Sorting Technologies for CCA Treated Wood Sarasota Team Meeting June 5, 2001

2. Objective To design and implement an automated system to effectively sort CCA-treated wood from other wood types at C&D facilities

3. Project Tasks Task 1: Construct Shelter Task 2: Construct Conveyor Task 3: Lab Test and Develop Detector Task 4: Install and Field Test Conveyor & Detector Task 5: Operate Sorting System and Document Performance

5. SHELTER

6. Control Room

7. CONVEYOR

8. DETECTOR

9. Experimentation Pallet Study 100 pallets tested and 0 were CCA-treated Wood Sort 2 construction piles and 2 demolition piles were sorted

10. Wood Sort

15. Questions? www.eng.miami.edu/~hmsolo/sarasota/index_sara.htm

16. Laser-Induced Breakdown Spectroscopy (LIBS)

17. LIBS spectrum of CCA-treated wood

18. LIBS detector: Tasks and status Acquire laser and spectrometer components Interface spectrometer to the computer for data acquisition with external triggering Optical configuration design and design of detector package Construct prototype detector system Synchronize spectrometer data acquisition with firing of laser

19. LIBS detector: Tasks and status (con’t) Interface output trigger signal with PC for firing strobe light upon CCA detection Design and build detector mount Field test instrument (4-20-01) Laser repair (estimate completion today) Construct timing delay circuit Final installation and testing

20. Optical configuration: Lens design Sample analysis regime Laser beam Beam expander

21. Optical configuration: Lens design Analysis Region

22. Spectrometer-computer interface Plasma emission Fiber optic Laptop computer Spectrometer Ext. trigger from laser Data acquisition and analysis Strobe trigger

23. Instrument synchronization Time0Pre-trigger Laser pulse (10 ns) Plasma emission (25 us) Chromium emission (10 us) Detector Delay

24. Strobe Fire strobe lights when CCA is detected Requires firing rate of 2 Hz and TTL trigger logic NOVA Electronics is building a custom strobe unit with four output channels

25. Initial field test on 4-20-01 Threshold