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WREN KLEINFELDER <br /> TABLE 7-4 <br /> Pass/Fail Criteria <br /> . ........... <br /> .. ........ <br /> Foundation Layer <br /> Density lower 1 foot Maximum Practical <br /> Density upper 1 foot 90% of ASTM D1 5 5 7 or greater <br /> Moisture content Near Optimum <br /> Soil type Any type provided no contaminants <br /> Layer thickness Not less than 2 feet <br /> Clod size 4-inch maximum <br /> Barrier Layer <br /> Density 95% of ASTM D1557 or greater <br /> Moisture content 3% minimum wet of optimum <br /> USCS classification of borrow CH, CL, SC, NIL, SM <br /> Grain size distribution of Minimum 60% passing#4 sieve <br /> soil/clay mixture I <br /> Permeability (laboratory) Not greater than 5X10-7 cm/sec* <br /> ermeability (field) Not greater than 1X10-6 cm/sec <br /> Layer thickness Not less than 1 foot <br /> Required laboratory permeability may be adjusted by the CQA Officer <br /> based on test-pad results. <br /> Vegetative Layer <br /> Density Approximately 80% to 85% <br /> USCS classification CH, CL, SC, NE, SM <br /> Layer thickness Not less than 1 foot <br /> CM5-276.wk1 Page 1 -Copyright Kleinfelder Inc. 1991 <br />