US Army Corps of Engineers, Engineering and Support Center Huntsville, 4820 University Square, Huntsville, AL 35816-1822

B -- DIGITAL GEOPHYSICAL MAPPING SERVICES SOL DACA87-00-Q-0005 DUE 012100 POC Evelyn Kelley, Contract Specialist, (256) 895-1317 E-MAIL: Lydia.B.Tadesse@HND01.usace.army.mil, Evelyn.H.Kelly@HND01.usace.army.mil. Reference CBD Submission No. 410641, submitted December 21, 1999 -- 16:22. The purpose of this modification is to make the following changes/clarifications:............................................... ...... ...................................................................... .......... The DIDs/clauses for this requirement can be found at the following web site:.. http://www.hnd.usace.army.mil/EBS/ASP/AdvertisedSolicitation.asp...... ...................................................................... .................... Line Item 0003 Description has been changed and the estimated quantity has been added to line item 003a........................................................ ...................................................................... .......... Line.................................................Estimated......Un it........ Item #....Units....Description........................Quantity.......Price. ..... 003................Geophysical Processing and Documentation.................... 003a......Project..Basic Report........................110..................... ...................................................................... .......... Terrain/Vegetation/PPE Modifiers................................................ Vegetation...................Terrain.................Multiplier....... .......... Heavily Wooded (60-100%).....Steep (>20%)...................................... Heavily Wooded (60-100%).....Moderate (5-20%).................................. Heavily Wooded (60-100%).....Level (<5%)....................................... ...................................................................... ......... Moderately Wooded (5-60%)....Steep (>20%)....................................... Moderately Wooded (5-60%)....Moderate (5-20%).................................. Moderately Wooded (5-60%)....Level (<5%)....................................... ...................................................................... ......... Open, Sparsely Wooded (<5%)..Steep (>20%)...................................... Open, Sparsely Wooded (<5%)..Moderate (5-20%).................................. Open, Sparsely Wooded (<5%)..Level (<5%)................1.0..................... ...................................................................... .......... PPE Modifier.............................................................. ...... PPE.............Level C......................................................... ...................................................................... .......... *Geophysical Survey System: Includes all Personnel and Equipment. Specify Integrated Detector(s) and Positioning System Type: (Lane width shall be no greater than 3 foot between transects unless otherwise specified, in line data collection frequency is greater than 1 sample per foot)......................... ...................................................................... .......... **Geophysical Survey System: Includes all Personnel and Equipment. Specify Integrated Detector(s) and Positioning System Type: Meandering Path/transect type surveys (not grid surveys), inline data collection frequency is greater than 1 sample per foot.......................................................... ...................................................................... .......... ***Specify Integrated Detec..................................................... ...................................................................... .......... All other terms and conditions as stated in the original CBD notice remain unchanged. Posted 12/22/99 (W-SN410927). (0356)

Loren Data Corp. http://www.ld.com (SYN# 0023 19991227\B-0004.SOL)