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Geotechnical Data Technical Memorandum <br />Hazeltine -Road Runners Rest II Gravel Pit Dining Project <br />December 2000 <br />1.0 INTRODUCTION <br />1.1 Purpose and Objective <br />The purpose of this Geotechnical Data Technical Memorandum is to present data collected from <br />our geotechnical field investigation and laboratory testing performed at the Hazeltine, Road <br />Runners Rest II, and Howe-Haller Gravel Pits, Adams County, Colorado. Analyses and <br />interpretation of the data collected are provided in the Design Report. <br />The objectives of the geotechnical work were to collect site-specific geotechnical and <br />groundwater information needed to evaluate alternative gravel pit lining systems and perform <br />final design of a liner system. <br />1.2 Scope of Work <br />GEI Consultants, Inc. (GEI) performed the following for the geotechnical data collection phase <br />of work: <br />1. Participated in a project start-up meeting with Denver Water and South Adams <br />County Water and Sanitation District (Client) to define the project design and <br />operating criteria for the Project. <br />' 2. Participated in a meeting with the Client and Colorado Office of the State <br />Engineer (SEO) to establish the acceptable leakage criteria at the Hazeltine and <br />~ Road Runners Rest II (Hazeltine/Road Runners Rest II) Gravel Pits. <br />3. Performed a literature search and reviewed available documents on local geology, <br />mining, permitted wells and septic systems, and ground water. <br />4. Drilled and logged 20 subsurface exploration borings and performed in situ field- <br />tests in the borings. Nineteen of the borings were drilled around the perimeter of <br />the Hazeltine and Road Runners Rest II Pits and one boring was drilled on the <br />berm between these two pits. <br />5. Installed dual level open standpipe piezometers in 7 of the completed borings. <br />6. Prepared permits and monitoring well installation reports for submittal to the <br />SEO. <br />na"rg°°--"""T" 1_I ~ GEI Consultants, Inc. <br />