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

SURFICIAL SLOPE STABILITY Project: WEHI Project No.: 101049801 Location: Cross Section B Date: 12/2/25 Soil Description: Topsoil es we Qos a me Ze PARAMETERS cohesion, c= 100 psf Friction Angle, 6= 30 ldeg wt. Soin, ¥6= 115 Ipef FS. = F/Fa= (d (y, - 62.4)Cos” i Tan 6 + ¢) / (dy, Sin i Cos i) FACTOR OF SAFETY, FS Assumes fall soil saturation to ground surface [Critical Slope Radians, i (degy 037 (Critical Slope Angle, i (deg) 21.04 FS for Critical Slope Ratio (horiz.:vert) Depth, d (ft) 2.6H:1V. 05 5.88 1 3.28 2 1.98 LANGAN