REPORT DOCUMENTATION PAGE Form Approved OMB No. 074-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503 1. AGENCY USE ONLY (Leave blank) 2. REPORT DATE Jan. 1997 3. REPORT TYPE AND DATES COVERED Field Demonstration, Jan. 1997 4. TITLE AND SUBTITLE Field Demonstration of the SCAPS XRF Metals Sensor 6. AUTHOR(S) W.T. Elam, Jane Adams, Karrol R. Hudson, Blair McDonald, Dan Eng, George Robitaille, and Ishwar Aggarawal 5. FUNDING NUMBERS N/A 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) Naval Research Lab, Washington D.C. 20375 USAE Waterways Experiment Station, Vicksburg, MS 39180 SFA, Inc., Upper Marlboro, MD 20785 University of Toledo, Toledo, OH 43606 US Army Environmental Center, Aberdeen P. G., MD 21010 8. PERFORMING ORGANIZATION REPORT NUMBER N/A 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) SERDP 901 North Stuart St. Suite 303 Arlington, VA 22203 10. SPONSORING / MONITORING AGENCY REPORT NUMBER N/A 11. SUPPLEMENTARY NOTES Demonstration from "Fifth Symposium on Field Screening Methods for Hazardous Wastes and Toxic Chemicals," Air and Waste Management Assoc, Las Vegas, NV, Jan. 1997. No copyright is asserted in the United States under Title 17, U.S. code. The U.S. Government has a royalty-free license to exercise all rights under the copyright claimed herein for Government purposes. All other rights are reserved by the copyright owner. 12a. DISTRIBUTION /AVAILABILITY STATEMENT Approved for public release: distribution is unlimited 13. ABSTRACT (Maximum 200 Words) 19980710 020 12b. DISTRIBUTION CODE The SCAPS XRF Metals Sensor adds metals detection capability to the DOD Site Characterization Penetrometer System (SCAPS). It works using X-ray Fluorescence (XRF) to detect all metals above calcium in the subsurface soil. The sensor head contains a miniature x-ray tube and cooled solid-state detector to achieve performance comparable to laboratory units in a down-hole sensor. The sensor may be pushed to depths as far as 150 feet by the cone penetrometer system and is designed to detect metals at concentrations below 100 ppm in all soil types regardless of moisture level. The system has been tested on the bench and demonstrated at a site. Following a brief overview of the sensor design and operation, the results of the bench testing, including evaluation of detection limits for a list of common contaminant metals, will be presented. Some operational test results are included, both on technical performance of the sensor and its robustness and effectiveness as a field tool. Finally, a list of potential improvements is given. 14. SUBJECT TERMS SCAPS XRF Metals Sensor, X-ray Fluorescence, Metals Detection, Soils, SERDP 15. NUMBER OF PAGES 6 16. PRICE CODE N/A 17. SECURITY CLASSIFICATION OF REPORT unclass. 18. SECURITY CLASSIFICATION OF THIS PAGE unclass. 19. SECURITY CLASSIFICATION OF ABSTRACT unclass. 20. LIMITATION OF ABSTRACT UL NSN 7540-01-280-5500 Standard Form 298 (Rev. 2-89) Prescribed by ANSI Std. Z39-18 298-102 DUG QUALITY INSPECTED 1