2025 01 14 West Essex Highlands Development Building D Slope Stability Study

APPENDIX C LABORATORY TESTING RESULTS LANGAN

UNCONFINED COMPRESSION TEST 600000 Compressive Stress, psf 450000 300000 150000 1 0 0 0.25 0.5 0.75 1 Axial Strain, % Sample No. Unconfined strength, psf Undrained shear strength, psf Failure strain, % Strain rate, in./min. Water content, % Wet density, pcf Dry density, pcf Saturation, % Void ratio Specimen diameter, in. Specimen height, in. Height/diameter ratio Description: Gray Rock Core LL = PL = 1 515719 257859 0.4 0.050 N/A 182.8 N/A N/A N/A 1.98 4.57 2.31 PI = Assumed GS= 2.7 Type: ASTM D7012 Project No.: 869 Date Sampled: 1-8-25 Client: Langan Engineering Remarks: Project: West Essex Highlands, West Orange, NJ Project#101049801 Sample Number: LB-3 C-1A 8.5-10.5' UNCONFINED COMPRESSION TEST RSA Geolab Union, New Jersey Figure Tested By: SP Checked By: KP

UNCONFINED COMPRESSION TEST 400000 Compressive Stress, psf 300000 200000 100000 1 0 0 0.5 1 1.5 2 Axial Strain, % Sample No. Unconfined strength, psf Undrained shear strength, psf Failure strain, % Strain rate, in./min. Water content, % Wet density, pcf Dry density, pcf Saturation, % Void ratio Specimen diameter, in. Specimen height, in. Height/diameter ratio Description: Gray Rock Core LL = PL = 1 323263 161632 0.4 0.050 N/A 182.3 N/A N/A N/A 1.98 4.66 2.35 PI = Assumed GS= 2.7 Type: ASTM D7012 Project No.: 869 Date Sampled: 1-8-25 Client: Langan Engineering Remarks: Project: West Essex Highlands, West Orange, NJ Project#101049801 Sample Number: LB-3 C-1B 8.5-10.5' UNCONFINED COMPRESSION TEST RSA Geolab Union, New Jersey Figure Tested By: SP Checked By: KP

L#25-396 LB-3 C-1A

L#25-3966 LB-3 C-1A

L#25-3966

L#25-3966 LB-3 C-1B

APPENDIX D RESULTS OF LEM ANALYSIS FOR STATIC CONDITION = = =

Cross Section A (Static Condition)

Color 690 Name Slope Stability Material Model Bedrock Hoek-Brown 180 Decomposed Rock/Very Dense Granular Soil Mohr-Coulomb 135 0 38 Dense to Very Dense Mohr-Coulomb Sand 125 0 34 Medium Dense Sand Mohr-Coulomb 120 0 32 Top Soil 115 0 30 Mohr-Coulomb Unit Weight (pcf) Effective Effective UCS Cohesion Friction Intact (psf) Angle (psf) (°) Intact Geological Disturbance Piezometric Rock Strength Factor D Surface Parameter Index GSI mi 323,263 17 65 1 1 1 2.204 640 TP-1 TP-8 LB-1 Potential Slip Surface TP-2 590 Factor of Safety: 2.204 Current Slip Surface Number: 327 TP-3 540 LB-2 Approximate location of Existing Building Elevation 490 440 390 340 290 240 190 0 100 200 300 400 500 600 700 Distance Cross Section A_Existing Condition 800 900 1,000 1,100 1,200