In April 1995, the U.S. Environmental Protection Agency (EPA) conducted a demonstration of field portable X-ray fluorescence (FPXRF) analyzers. The primary objectives of this demonstration were: (1) to determine how well FPXRF analyzers perform in comparison to standard reference methods, (2) to identify the effects of sample matrix variations on the performance of FPXRF, (3) to determine the logistical and economic resources needed to operate FPXRF analyzers, and (4) to test and validate an SW-846 draft method for FPXRF analysis. The demonstration design was subjected to extensive review and comment by the EPA's National Exposure Research Laboratory, EPA Regional and Headquarters Superfund technical staff, the EPA's Office of Solid Waste-Methods Section, and the technology developers. Two sites were used for this demonstration: the RV Hopkins site and the ASARCO Tacoma Smelter site (ASARCO). RV Hopkins is an active steel drum recycling facility and a former battery recycling operation. It is located in Davenport, Iowa. The ASARCO site is a former copper and lead smelter and is located in Tacoma, Washington. The test samples analyzed during this demonstration were evenly distributed between three distinct soil textures: sand, loam, and clay.

"EPA 600-R-97-147." "March 1998." " ... Contract No. 68-CO-0047 to PRC Environmental Management, Inc." --verso of t.p. "This work supports the Superfund Innovative Technology Evaluation Program administered by the National Risk Management Research Laboratory." --verso of t.p. "Environmental Technology Verification Program" --cover. Bibliographic references: p. 65.