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AMIL <br /> File No. 20-1008-49.1 k%J K L E I N F E L D E R <br /> December 8, 1992 <br /> vegetative material. Once the site has been cleared to the satisfaction of the Engineer and <br /> representatives of Kleinfelder, Inc., the contractor will finish grading the foundation layer to <br /> a smooth surface with no equipment disturbances greater than 1.5 inches in depth or height. <br /> Once the site has been prepared as outlined above, the Engineer will give authorization to <br /> commence with the construction of the test pad. <br /> PROCEDURE <br /> The Engineer will retain the right to stop work at any time during the site preparation and <br /> construction process should he perceive that the process is not proceeding in a manner <br /> conforming to these specifications or specifications outlined in the CQA Plan published by <br /> Kleinfelder, Inc. for the Harney Lane Landfill dated December 5, 1991. <br /> The construction of the test pad will proceed in two separate operations. Final thickness of <br /> the test pad will be 12 inches of mixed soil compacted to 95 percent of the maximum dry <br /> density as determined by the ASTM D-1557 test procedure. Total thickness of the test pad <br /> is to be achieved by the construction of 2 separate layers a minimum of 6 inches in compacted <br /> thickness each. If mixing and compaction equipment allow uniform mixing and compaction <br /> of the cover layer in one 12 inch lift, then the test pads may be constructed in one single <br /> operation. It will be up to the Engineer whether the construction will proceed in a one or two <br /> lift operation. <br /> The general process for a two-lift operation will be as follows: <br /> First a lift of specified borrow soil (SM/SP, SM, or ML material) will be placed upon the test <br /> pad site and graded to an even, uniform, smooth surface. Thickness of the loose soil will be <br /> approximately 8 inches which, when mixed with 20 percent Ione clay and compacted, will <br /> be at least 6 inches in thickness. Each section will be constructed of a different type of <br /> borrow material as described earlier. Representatives of Kleinfelder, Inc. will assist in the <br /> selection of each load of material removed from the borrow site and may reject any load <br /> deemed not representative of the soil type required for the individual test section under <br /> construction. <br /> Once the soil has been placed and the test pad surface has been prepared, then Ione Clay will <br /> be placed onto the test pad. If the test pad is to be constructed in 2 separate lifts, each truck <br /> carrying at least 25 tons (wet weight) of clay will roll onto the test pad and deposit the clay <br /> in one continuous operation from one end of the test pad to the other. To the extent possible, <br /> the deposition of the clay will be in such a manner as to uniformly deposit the clay from one <br /> end of the test pad to the other and the load will be exhausted completely as the truck arrives <br /> at the end of the test pad. Once deposited, the clay will be spread with a motor grader or like <br /> equipment over the respective area of the test pad. The process of deposition and spreading <br /> of the clay will be such as to evenly spread the deposited clay over the entire extent of the <br /> Copyright 1992 Kleinfelder, Inc Page 3 of 6 <br />