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ASCI — Turnpike Reservoir — Erie, Colorado <br />E 'ect No. 1134011 <br />anuary 16, 2015 <br />e2 <br />Earth Engineering Consultants, LLC <br />J�LI� <br />results, at the locations as described herein, in general conformed to the minimum project <br />compaction requirements of at least 90% of standard Proctor maximum dry density (ASTM <br />Specification D698) and were generally within the allotted moisture content range of 7% to 18% <br />of the material's optimum moisture content, as per the agreed upon CQC/QA plan dated March <br />12, 2013. <br />As per the CQC/QA plan, EEC personnel, during the site visit on December 17, 2014, obtained a <br />relatively undisturbed sample of the previously placed and compacted earthen liner material by <br />hand driving a "Shelby -tube" device approximately 18 -inches into the compacted zone. This was <br />performed to obtain a sample for hydraulic conductivity testing in general accordance with ASTM <br />D 5084 Specifications. The sample was obtained at the general location of EEC Field Density Test <br />No. 6. <br />Laboratory Testing <br />During the referenced period EEC personnel compared the field density test results obtained by <br />means of a Nuclear Densometer device in general accordance with ASTM D6938 to the <br />previously evaluated shale/siltstone bedrock material. <br />AC -17. I r .c 1=17w,.1 A -70111 *2 rs/& AAfle v=i4 1.1 .4� <br />Summary of Laboratory Compaction Characteristics and Classification of Soils <br />Hydraulic Conductivity Test Results <br />Standard Proctor Density <br />Soil Classification <br />Sample ID <br />Optimum Moisture Maximum Dry <br />Content, % Density, PCF <br />Liquid <br />Limit <br />Plastic % (-) No. <br />Index 200 Sieve <br />Description <br />Shale <br />15.5 112.0 <br />37 <br />22 85 <br />LEAN CLAY - CL <br />Laboratory testing performed on the retrieved hydraulic conductivity sample included a "Flex - <br />Wall Permeameter" test in general accordance with ASTM Specification D 5084 Method C, <br />results are shown below and are also included on the attached summary sheet. <br />\ <br />Hydraulic Conductivity Test Results <br />Hydraulic <br />Laboratory Testing - Soil Classification <br />Conductivity <br />1 ID <br />Sample <br />In -Situ In -Situ Dry Final Moisture Final Dry <br />o o PCF <br />Moisture, °/ Density, Content, °/ D t PCF C t t Density, <br />draulic <br />Con uctivitycm/sec <br />� <br />1 <br />11.1 115.0 15.7 118.0 <br />1.5 x 10-7 <br />Based on the field and laboratory test results as presented herein, the phase of the placed and <br />compacted earthen liner material conforms to the project specifications and the CQC/QA plan <br />dated March 12, 2013. <br />