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October 10, 1996 Kehn Construction 6322 South College Avenue Fort Collins. Colorado 8025 I Attn: Mc Dan Kehn Re: piezometer Installation Timuath Pit Larimer, Colorado EEC Project No: 1962094 Mr. Kehn: r EARTH ENGINEERINI CONSULTANTS, INC. Earth Engineering Consultants, Inc. (EEC) personnel have completed the installation of the requested piezometer noRh of the Timnath Pit in Larimer County, Colorado. The purpose of this report is to provide details concerning that installation. As requested, on October 2, 1996, one piezometer was installed at a location identified by Kehn Construction personnel. The field piezometer consisted of 2-inch nomina[ diameter PVC pipe and manufactured well screen. The piezometer was installed to allow for the evaluation of the hydrostatic head in the boring area. The boring was performed using atruck-mounted CME-45 drill rig equipped with a hydraulic head employed in drilling and sampling operations. The borehole was advanced using 4-inch nominal diameter continuous flight augers. An EEC engineer was on-site during the drilling to evaluate the materials encountered and direct the drilling activities. A log of the materials encountered based on visual and tactual observation of the auger cuttings is included with this report. The water level listed on the attached boring log is depth below existing ground surface. Fluctuations in water levels can occur over time depending on vviations in hydrologic conditions and other conditions not apparent at the time of this report. In addition, zones of perched and/or trapped water may be encountered in more permeable zoues at times throughout the year. Perched water is commonly encountered in the soils overlying less permeable eveathered bedrock. Loner teem monitoring of the piezometer would be required to more accurately evaluate ground water conditions. Centre For Advanced Technology 2301 Researoh Boubvatd, Suite 104 FoR Collins, CO 80526 (970) 2241522 FAX 224-4584