REPORT DOCUMENTATION PAGE 



form approved 



0MB No. 0704-0188 



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1. AGENCY USE ONLY (LEAVE BLANK) 



2. REPORT DATE 



February, 2000 



3. REPORT TYPE AND DATES COVERED 



FINAL REPORT 



4. TITLE AND SUBTITLE 



APPLICATION OF IN SITE UV SPECTROMETRY FOR CHARACTERIZATION OF HARBOR 

 SEDIMENT 



5. FUNDING NUMBERS 



6. AUTHOR(S) 



Gregory A. Tracey, Donald C. Rhoads, and Drew A. Carey 



7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 



Science Applications International Corporation 

 221 Third Street 

 Newport, RI 02840 



8. PERFORMIGORGANIZATION 

 REPORT NUMBER 

 SAIC-455 



9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 



US Army Corps of Engineers-New England District 

 696Virginia Rd 

 Concord, MA 01742-2751 



10. SPONSORING/MONITORING 

 AGENCY REPORT NUMBER 



DAMOS Contribution No. 127 



11. SUPPLEMENTARY NOTES 



Available from DAMOS Program Manager, Regulatory Branch 

 USACE-NAE , 696 Virginia Rd, Concord, MA 01742-2751 



12a. DISTRIBUTION/AVAILABILITY STATEMENT 



Approved for public release; distribution unlimited 



12b. DISTRIBUTION CODE 



13. ABSTRACT 



Polycyclic Aromatic Hydrocarbons (PAHs) are common constituents of aquatic sediments in navigable waterways. 

 The need for maintenance dredging and concern over proper disposal of dredged sediments requires that the distribution and 

 concentration of chemicals such as PAHs be known. This report presents preliminary findings from laboratory and field tests 

 of a portable fluorescence imaging system for mapping PAH distribution in sediment. 



The UltraViolet-Remote Ecological Monitoring Of The Seafloor (UV-REMOTS®) instrument collects a vertical 

 profile image of the top 6-8 cm of sediment at the sediment- water interface. Adapted from the photo REMOTS® system, it is 

 designed to provide a two-dimensional digital image wherein each component pixel constitutes a full spectral characterization 

 of fluorescence emission in response to a UV light source. The excitation and emission fi-equencies are selected to optimize 

 for the known PAH fluorescence response to UV light. Because PAHs are composed of many different compounds, variation 

 in intensity and spectral pattern correspond to changes in PAH concentration and composition. 



Results of the laboratory tests with spiked sediments indicate the UV-REMOTS® system can detect differences m 

 PAH concentration and composition in the range of 10-100 ppm (ug/g dry weight) and above. Field results fi-om the 

 Providence River suggest measurable differences in fluorescence between sampling locations as well as small-scale variation 

 in fluorescence within the image of a single sample. Based these results, it is concluded that UV-REMOTS® shows good 

 promise as a tool for rapid assessment of PAH concentration, composition and spatial distribution. 



14. SUBJECT TERMS Polycyclic Aromatic Hydrocarbons (PAHs), portable 

 fluorescence imaging system, UV-REMOTS® 



15. NUMBER OF TEXT PAGES: 11 



16. PRICE CODE 



17. SECURITY CLASSIFICATION OF 

 REPORT Unclassified 



18. SECURITY CLASSIFICATION 

 OF THIS PAGE 



19. SECURITY CLASSIFICATION 

 OF ABSTRACT 



20. LIMITATION OF 

 ABSTRACT 



