Department of the Interior, U.S. Geological Survey, 345 Middlefield Road,Mail Stop 285, Menlo Park, CA 94025-3591

66 -- LASER DIFFRACTION PARTICLE-SIZE ANALYZER.99 SOL 99WRQQ0066 DUE 083099 POC Margie N. Goslow (650)329-4175 E-MAIL: The following individual should be contacted if additional, mgoslow@usgs.gov. Laser Difraction particle-size analyzer. Manufacturer: Coulter Corp. Model: LS230 or equal The USGS INEEL project office has a requirement for a high-resolution particle-size analyzer to determine grain-size distributions of loosely consolidated sedimentary materials recovered from boreholes drilled at the INEEL. Sedimentary materials are comprised of clay-sized through gravel-sized components. Clays and Clay-sized particles are interspersed in a coarser grained matrix consisting of silt, sand and fine gravel-sized particles. High resolution analyses of these material are required to determine the material's hydrologic properties. Presision measurements are needed to resolve the distribuiton of different size fractions in the range of 0.04 microns through 2000 microns. Technology: Laser Diffraction Range: 0.04 micron to 2000 micron (single scan analysis over full range) Resolution: 100 channels or better Repeatability: better than 1% Sample Volume Requirements: 150 Ml nominal Calibration: Operator capable with traceable transfer standards Measurement Time: less than 2 minutes per sample Power Supply: 110/120 VAC Software Support: PC NT 4.0 or Windows 95/98 compatible (Y2K compatible); statistical profiling and graphical output capable On-site Training and Installation: YES Quantity 1 EA. Posted 08/19/99 (W-SN370296). (0231)

Loren Data Corp. http://www.ld.com (SYN# 0352 19990823\66-0007.SOL)