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i <br /> KL E/NFEL DER 481CabradoVSpr Springs,CO <br /> Bright People.Right Solutiorm 80919 <br /> pl 719.632.3593 <br /> f 1719.632.2648 <br /> December 22, 2008 kleinfeider.com <br /> Kleinfelder Project No. 99533 <br /> Ms. Patti Zietlow <br /> Colorado Springs Utilities <br /> 121 South Tejon Street <br /> Plaza of the Rockies, South Tower, 4th Floor <br /> Colorado Springs, CO 80903 <br /> Subject: Geotechnical Engineering Services <br /> Clear Spring Ranch Monitoring Wells <br /> Northwest of Interstate 25 and Ray Nixon Road <br /> Colorado Springs, Colorado <br /> Ms. Zietlow: <br /> This letter presents the results of Kleinfelder's geotechnical engineering services for the borings <br /> and monitoring wells installed at the Clear Spring Ranch Gravel Pit #2 (Phase 2), located <br /> northwest of Interstate 25 and Ray Nixon Road, south of Colorado Springs, Colorado. A <br /> Vicinity Map (Figure A-1) attached to this letter shows the general location of the project. The <br /> purpose of this investigation was to explore and evaluate subsurface soil conditions at the site <br /> and, based on the conditions encountered, install groundwater monitoring wells to be <br /> maintained by Colorado Springs Utilities (CSU). The scope of our investigation included the <br /> review of existing geologic information, the drilling and logging of eight (8) exploratory borings, <br /> analyzing the field data in terms of project requirements, and preparing this letter. <br /> FIELD EXPLORATION <br /> The field exploration was performed on November 21, 24, and December 8, 2008 and included <br /> drilling 8 exploratory borings (designated GP-2-1 through GP-2-8) within or near the existing <br /> Gravel Pit #2 (Phase 2) to depths of approximately 20 % to 67 % feet below existing ground <br /> surface, as indicated on the Boring Location Plan (Figure A-2). The borings were drilled using <br /> a CME-55 truck-mounted drill rig equipped with 44nch diameter, continuous-flight, solid-stem <br /> augers as well as 84nch outside diameter, hollow-stem augers. Drive samples were taken with <br /> a standard split spoon sampler at continuous intervals. Graphical logs describing the <br /> subsurface soil conditions encountered are included in Attachment B of this letter. The Boring <br /> Log Legend (also included in Attachment B)explains the symbols used on the boring logs. <br /> LABORATORY TESTING <br /> At the request of CSU, geotechnical and analytical laboratory tests on soil samples were not <br /> included in the scope of work. We can provide geotechnical and analytical laboratory test <br /> results for samples obtained during this investigation, if requested. <br /> 99533/CSPBR113 Page 1 of 3 December 22,2008 <br /> Copyright 2M KWMfelder <br />