Langan Rebuttal Report 9 15 2025

SECTION C-C ANGLE OF WEST EAST AVERAGE INTERNAL NLB-2 NLB-1 N-VALUE FRICTION surface elevation 612 582 total depth (feet) 20 26 (blows/ft) (degrees) 4 6 5 29 18 56 37 37 29 27 28 35 25 65 45 40 25 99 62 43 43 39 (see note 7) 0 1 2 3 4 5 6 7 DEPTH FROM SURFACE GRADE (FT) 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 NOTES 1 Subsurface information provided is generalized and is shown for illustration purposes only. 2 3 4 5 Refer to location plan for actual locations. Refer to logs for actual soil descriptions and details. The N-values tabulated are in blows/ft. Split spoon refusal values are represented by 99 blows/ft 6 Split spoon refusal values in the decomposed rock layer are excluded in this table. 7 The corresponding angle of internal friction was taken from Figure 19.5 of the "Foundation Engineering" (second edition) written by Ralph B. Peck, Walter E. Hanson and Thomas H. Thornburn