2025 06 18 WEH Slope Stability Analysis Letter Report

LB-4 Log of Boring Project West Essex Highlands 3 of 3 101049801 Location Elevation and Datum Type S-12 S-13 Recov. (in) Penetrresist BL/6in Number +512.0 Sample Data SS Sample Description Depth Scale SS Elev. (ft) Approx. el. 548.0 (NAVD 88) Coring (min) New Jersey, West Orange Material Symbol Sheet Project No. 36 Remarks N-Value (Blows/ft) (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 37 38 39 Reddish brown fine to medium SAND, some silt (moist) [SM] 40 4 120/5" 120/5" Drilled to 40 ft. S-12 at 40 ft 41 42 43 . 44 +503.0 +502.9 45 No Recovery End of Boring at 45.1ft. 46 47 48 49 50 51 52 53 54 55 56 Template: Log-BH; Strip: BH-GEO; Printed on 01/03/2025 0 50/1" 50/1" Drilled to 45 ft. S-13 at 45 ft Stopped drilling 12/17/2024 at 10:08 AM. Upon completion, borehole backfilled with soil cuttings and hole plug.

NLB-1 Log of Boring Project West Essex Highlands 1 of 2 101049801 Location Elevation and Datum West Orange, New Jersey Approx. el. 582.0 (NAVD 88) Drilling Company Date Started Date Finished Craig Geotechnical Drilling 5/1/2025 Drilling Equipment Rock Depth ATV Rig Elev. (ft) 140 140 Drop (in) Sample Description +582.0 Dark brown SILT, trace fine to coarse sand, trace clay with roots and leaves (dry) [TOPSOIL] Water Level (ft.) No Recovery Completion - 0 - Core 24 HR. 2 - Drilling Foreman Mark Aquino Field Engineer Rebecca Blocker 30 Depth Scale Sample Data 0 Remarks N-Value (Blows/ft) S-1 5 Started drilling at 1:45 PM on 5/1/2025. S-1 at 0 ft 6 4 6 2 (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 1 2 1 +580.0 Undisturbed 7 First Type 2in OD Split Spoon Weight (lbs) Automatic 17.0 ft Disturbed Recov. (in) Penetrresist BL/6in Automatic Weight (lbs) Number 4" diameter steel Casing Depth (ft) 15.0 Drop (in) 30 SS Sampler Hammer Number of Samples Coring (min) Sampler 26.0 ft 3-7/8in Tricone Roller Bit Casing Diameter (in) Casing Hammer 5/2/2025 Completion Depth Size and Type of Bit S-2 at 2 ft 10 19 Drove casing to 4 ft. Drilled to 4 ft. S-3 at 4 ft 10 SS S-3 14 27 15 12 6 S-4 at 6 ft 47 S-4 SS 30 7 Orangish brown to gray Silty fine to coarse SAND, some gravel, trace clay (moist) [SM] 56 36 12 5 Orangish brown to gray Silty fine to coarse SAND, some gravel (moist) [SM] 0 4 18 65 35 22 8 43 S-5 SS Orangish brown to gray Silty fine to coarse SAND, some gravel (moist) [SM] S-2 SS 20 3 8 100 9 100 Drove casing to 8 ft. Drilled to 8 ft. S-5 at 8 ft . Stopped drilling at 2:30 PM on 5/1/2025. Started drilling at 7:15 AM on 5/2/2025. No Recovery 10 S-6 SS +572.0 S-7 SS 0 50/1" 50/1" Drove casing to 10 ft. Drilled to 10 ft. S-6 at 10 ft 50/1" 50/1" Drove casing to 15 ft. Drilled to 15ft. S-7 at 15 ft 11 12 13 14 . Material Symbol Sheet Project No. No Recovery 15 0 16 Template: Log-BH; Strip: BH-GEO; Printed on 06/17/2025

NLB-1 Log of Boring Project West Essex Highlands 2 of 2 101049801 Location Elevation and Datum +566.0 Type Sample Data Recov. (in) Penetrresist BL/6in Sample Description Depth Scale Number Elev. (ft) Approx. el. 582.0 (NAVD 88) Coring (min) West Orange, New Jersey Material Symbol Sheet Project No. 16 +565.0 17 Gray BASALT [BEDROCK] N-Value (Blows/ft) Remarks (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 Drilled to 17 ft. Hard drilling. Rig chattering. C-1 at 17 ft 05:20 09:09 C-1 NQ 19 20 06:04 RQD=0"/60"=0% 11:14 REC=47"/60"=78% 18 21 14:15 22 Gray BASALT [BEDROCK] C-2 at 22 ft 25 09:15 +556.0 End of Boring at 26.0ft. 26 27 28 29 30 31 32 33 34 35 36 Template: Log-BH; Strip: BH-GEO; Printed on 06/17/2025 C-2 NQ 24 04:57 RQD=11"/48"=23% 23 06:53 REC=48"/48"=100% 12:42 Core barrel clogging during coring. Stopped drilling at 10:30 AM on 5/2/2025. Upon completion, borehole backfilled to grade with soil cuttings.

NLB-2 Log of Boring Project West Essex Highlands 1 of 2 101049801 Location Elevation and Datum West Orange, New Jersey Approx. el. 612.0 (NAVD 88) Drilling Company Date Started Date Finished Craig Geotechnical Drilling 4/30/2025 Drilling Equipment Rock Depth ATV Rig 140 Drop (in) Sample Description +612.0 5 Completion - 0 - Core 24 HR. 2 - Mark Aquino Field Engineer Rebecca Blocker 30 Depth Scale Sample Data Type Elev. (ft) 140 Undisturbed Drilling Foreman Recov. (in) Penetrresist BL/6in 2in OD Split Spoon Weight (lbs) Automatic Water Level (ft.) Number Automatic Weight (lbs) 10.0 ft Disturbed First 0 Brown Silty fine to coarse SAND, some gravel, trace clay (moist) [SM] Remarks N-Value (Blows/ft) Started drilling at 9:18 AM on 4/30/2025. S-1 at 0 ft 1 1 S-1 18 4 3 6 2 Dark brown Silty fine to coarse SAND, some gravel, trace clay with root hairs (moist) [SM] (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 1 SS 4" diameter steel Casing Depth (ft) 8.0 Drop (in) 30 S-2 at 2 ft 15 8 3 S-2 SS Sampler Hammer Number of Samples Coring (min) Sampler 20.0 ft 3-7/8in Tricone Roller Bit Casing Diameter (in) Casing Hammer 4/30/2025 Completion Depth Size and Type of Bit 3 18 10 12 4 No Recovery Drove casing to 4 ft. Drilled to 4 ft. S-3 at 4 ft 14 S-3 SS 19 5 0 29 10 4 6 Brown Clayey fine to coarse SAND, some silt, trace gravel (wet) [SM] S-4 at 6 ft 12 S-4 SS 6 S-5 SS 13 7 6 25 12 10 8 Brown Silty fine to coarse SAND, trace clay (wet) [SM] 4 50/1" Drove casing to 8 ft. Drilled to 8 ft. S-5 at 50/1" 8 ft 9 +602.0 10 Gray BASALT [BEDROCK] Drilled to 10 ft. Hard drilling. Rig chattering. C-1 at 10 ft 07:15 12 04:14 C-1 13 04:19 RQD=43"/60"=72% 03:30 REC=60"/60"=100% 11 NQ Material Symbol Sheet Project No. 14 06:19 15 Gray BASALT [BEDROCK] C-2 at 15 ft 04:45 16 Template: Log-BH; Strip: BH-GEO; Printed on 06/17/2025

NLB-2 Log of Boring Project West Essex Highlands 2 of 2 101049801 Location Elevation and Datum Type C-2 Recov. (in) Penetrresist BL/6in +596.0 Sample Data Number Sample Description Depth Scale NQ 01:52 17 03:07 18 02:25 N-Value (Blows/ft) Remarks (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 RQD=56"/60"=93% 16 REC=56"/60"=93% Elev. (ft) Approx. el. 612.0 (NAVD 88) Coring (min) West Orange, New Jersey Material Symbol Sheet Project No. 19 03:39 +592.0 End of Boring at 20.0ft. 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Template: Log-BH; Strip: BH-GEO; Printed on 06/17/2025 Stopped drilling at 12:13 PM on 4/30/2025. Upon completion, borehole backfilled to grade with soil cuttings.

NLB-3 Log of Boring Project West Essex Highlands 1 of 2 101049801 Location Elevation and Datum West Orange, New Jersey Approx. el. 566.0 (NAVD 88) Drilling Company Date Started Date Finished Craig Geotechnical Drilling 5/5/2025 Drilling Equipment Rock Depth ATV Rig Dark brown SILT, trace clay, trace fine sand with root fragments (moist) [TOPSOIL] Brown Silty fine to coarse SAND, trace gravel (moist) [SM] S-1 4 (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) Started drilling at 7:33 AM on 5/5/2025. S-1 at 0 ft 6 3 2 S-2 at 2 ft 6 S-2 18 9 4 7 4 Drove casing to 4 ft. Drilled to 4 ft. S-3 at 4 ft 3 5 S-3 12 11 6 5 6 S-4 at 6 ft 12 19 S-4 19 35 16 55 8 Drove casing to 8 ft. Drilled to 8 ft. S-5 at 8 ft 13 22 9 Orangish brown Silty fine to coarse SAND, some gravel, trace clay (wet) [SM] - 5 7 Orangish brown Silty fine to coarse SAND, trace gravel, trace clay (moist) [SM] 2 10 20 30 40 2 2 5 Orangish brown Silty fine to coarse SAND, trace gravel, trace clay (moist) [SM] - 24 HR. Remarks N-Value (Blows/ft) 3 3 Orangish brown Silty fine to coarse SAND, some gravel, trace clay (moist) [SM] Type 0 1 +564.0 Sample Data Recov. (in) Penetrresist BL/6in +566.0 Depth Scale Number Sample Description - Core Rebecca Blocker 30 SS Drop (in) Completion 0 Mark Aquino SS 140 8 Field Engineer SS 140 Undisturbed Drilling Foreman SS 2in OD Split Spoon Weight (lbs) Automatic Water Level (ft.) S-5 SS Automatic Weight (lbs) 22.0 ft Disturbed First 15 50 28 27 10 S-6 at 10 ft 26 53 11 S-6 SS Elev. (ft) 4" diameter steel Casing Depth (ft) 20.0 Drop (in) 30 8 109 56 66 12 13 14 Orangish brown Silty fine to coarse SAND, some gravel, trace clay (wet) [SM] 15 Drove casing to 15 ft. Drilled to 15 ft. S-7 at 15 ft 18 23 16 S-7 SS Sampler Hammer Number of Samples Coring (min) Sampler 32.0 ft 3-7/8in Tricone Roller Bit Casing Diameter (in) Casing Hammer 5/5/2025 Completion Depth Size and Type of Bit Material Symbol Sheet Project No. 17 43 20 Template: Log-BH; Strip: BH-GEO; Printed on 06/17/2025

NLB-3 Log of Boring Project West Essex Highlands 2 of 2 101049801 Location Elevation and Datum +549.8 Type Sample Data Recov. (in) Penetrresist BL/6in Sample Description Depth Scale Number Elev. (ft) Approx. el. 566.0 (NAVD 88) Coring (min) West Orange, New Jersey Material Symbol Sheet Project No. 16.2 Remarks N-Value (Blows/ft) (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 17 17 18 . 19 S-8 SS 20 No Recovery 0 50/1" 50/1" Drove casing to 20 ft. Drilled to 20 ft. S-8 at 20 ft 21 +544.0 22 Gray BASALT [BEDROCK] Drilled to 22 ft. Hard drilling. Rig chattering. C-1 at 22 ft 06:10 C-1 25 15:37 RQD=25"/60"=42% 07:10 NQ 24 REC=60"/60"=100% 23 05:33 26 09:32 27 Gray BASALT [BEDROCK] C-2 at 27 ft 06:22 06:28 C-2 30 08:42 NQ 29 RQD=29"/60"=48% 11:11 REC=45"/60"=75% 28 31 08:18 +534.0 End of Boring at 32.0ft. 32 33 34 35 36 Template: Log-BH; Strip: BH-GEO; Printed on 06/17/2025 Stopped drilling at 11:54 AM on 5/5/2025. Upon completion, borehole backfilled to grade with soil cuttings.

NLB-4 Log of Boring Project West Essex Highlands 1 of 2 101049801 Location Elevation and Datum West Orange, New Jersey Approx. el. 609.0 (NAVD 88) Drilling Company Date Started Date Finished Craig Geotechnical Drilling 5/1/2025 Drilling Equipment Rock Depth ATV Rig Sample Description +609.0 - Core 3 24 HR. - Mark Aquino Rebecca Blocker 30 Depth Scale Sample Data Type Drop (in) - Recov. (in) Penetrresist BL/6in 140 Completion 0 Field Engineer Number Elev. (ft) 140 Undisturbed Drilling Foreman 0 Brown Silty fine to coarse SAND, trace gravel with roots (moist) [TOPSOIL] Remarks N-Value (Blows/ft) Started drilling at 7:52 AM on 5/1/2025. S-1 at 0 ft 1 1 +607.0 S-1 10 2 1 4 2 Brown Silty fine to coarse SAND, trace gravel, trace clay (moist) [SM] (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 1 SS 2in OD Split Spoon Weight (lbs) Automatic Water Level (ft.) S-2 at 2 ft 5 10 3 S-2 SS Automatic Weight (lbs) 5 First 20 20 10 12 4 Brown Clayey fine to coarse SAND, some silt, trace gravel (moist) [SM] Drove casing to 4 ft. Drilled to 4 ft. S-3 at 4 ft 16 6 5 +603.0 6 Gray GRAVEL, in spoon tip (wet) [GP] S-3 SS 4" diameter steel Casing Depth (ft) 10.0 Drop (in) 30 12.0 ft Disturbed 4 S-4 SS Sampler Hammer Number of Samples Coring (min) Sampler 22.0 ft 3-7/8in Tricone Roller Bit Casing Diameter (in) Casing Hammer 5/1/2025 Completion Depth Size and Type of Bit 1 10 16 12 100/4" 100/4" 7 +600.0 C-1 9 10 S-5 6 11 +597.0 21 100/4" 12 Gray BASALT [BEDROCK] Drove casing to 10 ft. Drilled to 10 ft. S-5 at 10 ft 10 SS Brown GRAVEL, some silt, some fine to coarse sand (wet) [GM] Drilled to 8 ft. C-1 at 8 ft RQD=50% 03:30 NQ 8 BOULDER REC=50% +601.0 S-4 at 6 ft Drove casing to 7 ft. Hard drilling. Rig chattering. 100/4" Drilled to 12 ft. Hard drilling. C-2 at 12 ft 08:54 14 05:32 C-2 15 04:40 RQD=31"/60"=52% 06:37 REC=57"/60"=95% 13 NQ Material Symbol Sheet Project No. 16 Template: Log-BH; Strip: BH-GEO; Printed on 06/17/2025

NLB-4 Log of Boring Project West Essex Highlands 2 of 2 101049801 Location Elevation and Datum +593.0 Type Sample Data Recov. (in) Penetrresist BL/6in Sample Description Depth Scale Number Elev. (ft) Approx. el. 609.0 (NAVD 88) Coring (min) West Orange, New Jersey Material Symbol Sheet Project No. 16 N-Value (Blows/ft) Remarks (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 08:46 17 Gray BASALT [BEDROCK] C-3 at 17 ft 07:11 06:23 C-3 20 13:31 NQ 19 RQD=50"/60"=83% 05:47 REC=58"/60"=97% 18 21 12:20 +587.0 End of Boring at 22.0ft. 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Template: Log-BH; Strip: BH-GEO; Printed on 06/17/2025 Stopped drilling at 12:41 PM on 5/1/2025. Upon completion, borehole backfilled to grade with soil cuttings.

APPENDIX B LOGS OF LANGAN TEST PITS LANGAN