2025 06 18 WEH Slope Stability Analysis Letter Report

APPENDIX D LABORATORY TESTING RESULTS LANGAN

Letter of Transmittal Date: 1-8-25 Job No.: 869 Attention: A. Yoda Langan Engineering & Environmental Services CC: R. Blocker Re: West Essex Highlands, West Orange, NJ Project#101049801 Sample(s) ID: Lab Log: 25-3966 LB-3 C-1 Dear A. Yoda, Please find attached results for the samples referenced above. The following lab testing was performed:  ASTM D7012 Uncofined Compression of Rock Cores (2 tests) Regards, RSA Geolab, LLC Remarks: If you have any questions, please call 908-964-0786. Signed: _______________________ Dr. Raza S. Ahmed President RSA Geolab, LLC https://www.rsageolab.com/ email: rsa@rsageolab.com RSA’s Geolab’s Geotechnical Laboratory testing was performed and results reported in accordance with ASTM standards and accepted industry standards. No other representations or warranties either express or implied are given. RSA Geolab, LLC neither accepts responsibility for nor makes claim to the final use and purpose of the material tested. RSA Geolab, LLC owns all rights, title and interest of the work product. This report is intended for client’s sole and exclusive use and not for the benefit of others and may not be used or relied upon by others. These documents must be considered proprietary information and should not be reproduced without the written approval of RSA Geolab, LLC.

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#25-3966 LB-3C-1A

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

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

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

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

Cross Section A (Static Condition)