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Slurry Wall Design Report Loloff Pit 5/24/2016 Page 3 of 16 Parameter Method Reference Afterberg Limits ASTM D 4318 #200 Wash ASTM D 1140 Particle Size Analysis ASTM D 422 Permeability Test ASTM D 5084 March Funnel Viscosity ASTM D 6910 Unit Weight ASTM C 138 Viscosity and Mud Density of Bentonite Slurry API RP 13B Index, swell and strength testing of the samples were performed at Martinez Associates laboratory in Golden, Colorado. For clayey soils a-200 wash and plasticity index test was conducted to determine the properties and quantities of the fines content. Gradations were performed on the sand and gravels to determine grain size analyses and the quantity of fines content within the coarse alluvium. Strength properties of the bedrock were determined from unconfined compression test results. The field test boring reports were amended as necessary to reflect laboratory test data during preparation of the final boring reports. The results of the laboratory testing are presented in Appendix B. The soil and rock laboratory results are also summarized at the end of this report in Table I and on the boring logs in Appendix A. A permeability test completed as part of the mix design process was conducted by Advanced Terra Testing in Lakewood, Colorado and a summary of the test results are presented in Table V. Samples of the construction water designated by the owner were tested to determine the hardness and pH of the water for bentonite yield considerations. The slurry-bentonite mix design is discussed in more detail in Section 5. 2.1.3 Packer Testing Four borings included packer testing. Packer testing was performed to help evaluate the competency of the bedrock for the slurry wall key. Single packer, constant-head, water pressure tests were performed to assess the rock mass hydraulic conductivity. The packer tests were conducted in general accordance with the United States Bureau of Reclamation field hydraulic conductivity in boreholes. Water was delivered at constant pressure to the test zone through a valve and pipe assembly using water pressure from the drill rig. A gauge in the water transmission system measured pressure in excess of hydrostatic within the test interval. Pressure within the interval equaled the sum of the hydrostatic head, gauge pressure, and stick up height at the gauge. The packer assembly consisted of a length of perforated steel rod pipe with an inflatable packer on one end. This assembly was attached to a 1-inch I.D. steel pipe and lowered into the hole. Water from the drill rig was pumped through a valve assembly, where flow quantity, and in-line pressure were displayed, down the drill rods to the perforated pipe between the inflated packers. The testing procedure consists of seating an inflatable rubber packer at the top of the test zones, and pumping water into the test zones through a metering system. A constant pressure BRIERLEY ASSOCIATES Creating Space Underground