O38 Email from Nov 13 2025 to Dec 9 2025 between Mr Kleinberg and Mr Seele

SURFICIAL SLOPE STABILITY Project: WEHI Location: Cross Section A Soil Description: Top Soil Wwe eo i PARAMETERS (cohesion, c= 100 pst Friction Angle, = 30 deg Wt. S0il ap, Ys = 11S pet FS. = FF y= (d (7, - 62.4)Cos*i Tan 6 +c) / (dy, Sin i Cos i) FACTOR OF SAFETY, FS Assumes full soil saturation to ground surface (Critical Slope Radians, i (deg) 0.34 [Critical Slope Angle, i (deg) 19.33 FS for Critical Slope Ratio (horiz.:vert.) Depth, d (fy 2.85H:1V 05 6.32 I 3.54 2 2.14 Project No. Date: 101049801 12/2/25 LANGAN