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KL ElNFELDER <br /> File No. 20-1008-49.001 <br /> August 19, 1994 <br /> A summary of field density tests consisting of test designations and locations, in-place dry <br /> densities and moisture contents, laboratory-obtained maximum dry densities and optimum <br /> moisture content, and specified and achieved relative compaction is attached. Samples of the <br /> materials tested were brought to our laboratory for determination of the maximum density- <br /> optimum moisture content. The laboratory test results are shown on Table I. Laboratory <br /> compaction curves are presented on Plates 3 through 5. <br /> It should be noted that all failing tests were retested and passed. The reason for the test <br /> failures was to assess the number of passes of the compaction equipment to achieve passing <br /> results. <br /> PERMEABILITY TESTING <br /> On August 3, 1994, three block samples were acquired from the test pad for permeability tests. <br /> County personnel used a John Deer 31OD backhoe equipped with 24-inch bucket to cut out the <br /> samples. After samples were acquired, test pad holes were backfilled with native soils and <br /> staked for later backfilling with Ione clay. The first sample was acquired from the "2-lift" <br /> process pad; the remaining two samples were acquired from the "single-lift" process pad. We <br /> note that the top 1 foot of the barrier layer readily sheared apart from the bottom in the "two- <br /> lift" pad. <br /> Samples were sealed in the field to prevent moisture loss and were transported to our <br /> laboratory for testing. Laboratory permeability tests were performed in general accordance <br /> with ASTM D-5084 test method. Results of these tests are presented below: <br /> Sample Location Permeability <br /> North 1155 East 1179 1.4 x 10-8 <br /> at -0.3' cm/sec <br /> North 1204 East 1128 5.0 x 10-8 <br /> at -0.5' cm/sec <br /> North 1150 East 1113 2.0 x 10-8 <br /> at -0.5' cm/sec <br /> INFILTROMETER TEST <br /> General <br /> A sealed double-ring infiltrometer (SDRI) was utilized for in situ permeability testing of the <br /> newly-placed test pad. The SDRI apparatus and test procedures were in general accordance <br /> with those described by David Daniel and Steven Trautwein in their paper "Field Permeability <br /> Tests for Earthen Liners," S.P. Clemence, ed., 1986, Use of In Situ Tests in Geotechnical <br /> Engineering, pp. 146-160. <br /> GSM:md 13/94 <br /> Copyright 1994 KLeinfetder, Inc. Page 4 of 7 <br />