2025 06 18 WEH Slope Stability Analysis Letter Report

APPENDIX A LOGS OF LANGAN BORINGS LANGAN

LB-1 Log of Boring Project West Essex Highlands 1 of 2 101049801 Location Elevation and Datum West Orange, New Jersey Approx. el. 604.0 (NAVD 88) Drilling Company Date Started Date Finished Craig Geotechnical Drilling Co., Inc. 12/12/2024 Drilling Equipment Rock Depth ATV Rig 140 Drop (in) Sample Description +604.0 - - Core 2 24 HR. - Matt Michelotti Field Engineer Rebecca Blocker 30 Depth Scale Sample Data Type 140 Completion 0 Drilling Foreman Recov. (in) Penetrresist BL/6in 2in OD Split Spoon Weight (lbs) Automatic Undisturbed 5 First Water Level (ft.) Number Automatic Weight (lbs) 12.0 ft Disturbed 0 Brown fine to coarse SAND, some silt, trace clay, root fragments (moist) [TOPSOIL] 1 +602.0 (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 Began drilling 12/12/2024 at 8:19 AM G-1 at 0 ft G-1 2 Brown fine to medium SAND, trace silt, some gravel (dry) [SP] Remarks N-Value (Blows/ft) GRAB Elev. (ft) 4" diameter steel Casing Depth (ft) 9.0 Drop (in) 30 Hand auger to 2 ft. Refusal on possible boulder. S-1 at 2 ft 5 25 3 S-1 SS Sampler Hammer Number of Samples Coring (min) Sampler 24.0 ft 3-7/8in Tricone Roller Bit Casing Diameter (in) Casing Hammer 12/12/2024 Completion Depth Size and Type of Bit 6 +599.0 56 5 Reddish brown Silty SAND, trace clay, trace gravel (moist) [SM] 70 45 4 Drove casing to 5 ft. Drilled to 5 ft. S-2 at 5 ft 10 SS +597.0 S-2 6 S-3 SS 15 6 6 7 Reddish brown Sandy SILT, some clay, some gravel (moist) [ML] 25 40 35 54 50/2" 50/2" S-3 at 7 ft Spoon bouncing. . 8 +595.0 9 [DECOMPOSED ROCK] S-4 SS Material Symbol Sheet Project No. 0 50/2" 50/2" Drove casing to 9 ft. Drilled to 9 ft. S-4 at 9 ft 10 11 12 Very hard drilling. Rig chatter. 13 +590.0 14 Gray BASALT [BEDROCK] C-1 at 14 ft 03:22 15 02:35 16 Template: Log-BH; Strip: BH-GEO; Printed on 01/03/2025

LB-1 Log of Boring Project West Essex Highlands 2 of 2 101049801 Location Elevation and Datum Type C-1 Recov. (in) Penetrresist BL/6in +588.0 Sample Data Number Sample Description Depth Scale NQ 02:35 17 01:38 18 N-Value (Blows/ft) Remarks (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 re RQD=35"/60"=58% 16 REC=58"/60"=97% Elev. (ft) Approx. el. 604.0 (NAVD 88) Coring (min) New Jersey, West Orange Material Symbol Sheet Project No. 01:21 19 Gray BASALT [BEDROCK] C-2 at 19 ft 02:05 C-2 22 02:41 NQ 21 02:37 RQD=49"/60"=82% 02:10 REC=58"/60"=97% 20 23 02:32 +580.0 End of Boring at 24.0ft. 24 25 26 27 28 29 30 31 32 33 34 35 36 Template: Log-BH; Strip: BH-GEO; Printed on 01/03/2025 Stopped drilling 12/12/2024 at 11:00 AM. Upon completion, borehole backfilled with soil cuttings and hole plug.

LB-2 Log of Boring Project West Essex Highlands 1 of 3 101049801 Location Elevation and Datum West Orange, New Jersey Approx. el. 522.0 (NAVD 88) Drilling Company Date Started Date Finished Craig Geotechnical Drilling Co., Inc. 12/17/2024 Drilling Equipment Rock Depth ATV Rig 140 140 Drop (in) Water Level (ft.) Undisturbed 14 First Completion - 0 - Core 24 HR. 0 - Drilling Foreman Matt Michelotti Field Engineer Rebecca Blocker 30 Sample Description +522.0 Dark brown Silty fine to medium SAND, trace clay, with root pieces (moist) [TOPSOIL] Depth Scale 0 Light brown SILT, some fine to coarse sand, some clay, trace gravel (moist) [ML] +519.0 [POSSIBLE COBBLES] Remarks N-Value (Blows/ft) S-1 5 Began drilling 12/17/2024 at 10:41 AM. S-1 at 0 ft 4 2 1 2 S-2 at 2 ft 1 S-2 10 6 50/2" 50/2" 3 4 +517.0 Light brown Silty SAND, some gravel, trace clay (moist) [SM] (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 1 2 1 +520.0 Sample Data Type 2in OD Split Spoon Weight (lbs) Automatic Not Encountered Disturbed Recov. (in) Penetrresist BL/6in Automatic Weight (lbs) Number Elev. (ft) 4" diameter steel Casing Depth (ft) 15.0 Drop (in) 30 SS Sampler Hammer Number of Samples SS Sampler 50.1 ft 3-7/8in Tricone Roller Bit Casing Diameter (in) Casing Hammer 12/17/2024 Completion Depth Size and Type of Bit Hard drilling, rig chattering. 5 Drove casing to 5 ft. Drilled to 5 ft. S-3 at 5 ft 15 SS Light brown Silty SAND, some gravel, trace clay (moist) [SM] S-3 2 S-4 SS 26 6 7 7 50 24 40 57 50/2" S-4 at 7 ft 50/2" 8 Hard drilling, rig chattering. 9 Light brown Silty SAND, some gravel, trace clay (moist) [SM] 10 Drove casing to 10 ft. Drilled to 10 ft. S-5 at 10 ft 21 Light brown to gray fine to coarse SAND, some silt, some gravel (dry) [SM] S-5 SS 20 11 2 S-6 12 15 78 39 32 14 Brown fine to coarse SAND, some gravel, trace silt (moist) [SP] S-6 at 12 ft 29 39 13 +507.0 40 20 19 12 SS Material Symbol Sheet Project No. Drove casing to 15 ft. Drilled to 15 ft. S-7 at 15 ft 18 25 16 Template: Log-BH; Strip: BH-GEO; Printed on 01/03/2025

LB-2 Log of Boring Project West Essex Highlands 2 of 3 101049801 Elevation and Datum New Jersey, West Orange +506.0 16 Sample Data Type Sample Description Depth Scale Number Elev. (ft) Approx. el. 522.0 (NAVD 88) S-7 Recov. (in) Penetrresist BL/6in Location Material Symbol Sheet Project No. 19 Remarks N-Value (Blows/ft) (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 28 53 29 17 18 19 No Recovery 20 Drilled to 20 ft. S-8 at 20 ft 15 S-8 SS 10 21 0 22 12 16 22 23 24 25 Drilled to 25 ft. S-9 at 25 ft 14 18 26 S-9 SS Light reddish brown fine to medium SAND, trace silt (moist) [SP] 20 45 27 34 27 28 29 Reddish brown Silty fine to coarse SAND, trace gravel, trace clay (moist) [SM] 30 Drilled to 30 ft S-10 at 30 ft 22 24 31 S-10 SS +492.0 20 62 38 32 32 33 Reddish brown Silty fine to coarse SAND, some clay, trace fine to coarse gravel (moist) [SM] 35 36 Template: Log-BH; Strip: BH-GEO; Printed on 01/03/2025 S-11 SS 34 3 80/3" 80/3" Drilled to 35 ft. S-11 at 35 ft. Spoon bouncing.

LB-2 Log of Boring Project West Essex Highlands 3 of 3 101049801 Elevation and Datum New Jersey, West Orange Number Type S-12 SS +486.0 Sample Data S-13 SS Sample Description Depth Scale S-14 SS Elev. (ft) Approx. el. 522.0 (NAVD 88) Recov. (in) Penetrresist BL/6in Location 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 No Recovery 40 0 50/1" 50/1" Drilled to 40 ft. S-12 at 40 ft 41 42 43 . 44 +477.0 No Recovery [POSSIBLE DECOMPOSED ROCK] 45 0 50/1" 50/1" Switched to drag bit. Drilled to 45 ft. S-13 at 45 ft. Spoon bouncing. Spoon tip rock fragment, possible decomposed rock. 46 47 48 . 49 +471.9 No Recovery [POSSIBLE DECOMPOSED ROCK] End of Boring at 50.1ft. 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 50 ft. S-14 at 50 ft. Spoon bouncing. Stopped drilling 12/17/2024 at 1:33 PM. Upon completion, borehole backfilled with soil cuttings and hole plug.

LB-3 Log of Boring Project West Essex Highlands 1 of 2 101049801 Location Elevation and Datum West Orange, New Jersey Approx. el. 614.0 (NAVD 88) Drilling Company Date Started Date Finished Craig Geotechnical Drilling Co., Inc. 12/12/2024 Drilling Equipment Rock Depth ATV Rig 140 Drop (in) Sample Description +614.0 4 Completion - 0 - Core 24 HR. 2 - Matt Michelotti Field Engineer Brian McGlew 30 Depth Scale Sample Data Type 140 Undisturbed Drilling Foreman Recov. (in) Penetrresist BL/6in 2in OD Split Spoon Weight (lbs) Automatic Water Level (ft.) Number Automatic Weight (lbs) 9.0 ft Disturbed First 0 Tannish brown SILT, some fine to coarse sand, trace clay (moist) [TOPSOIL] Remarks N-Value (Blows/ft) Began drilling 12/12/2024 at 11:51 AM. S-1 at 0 ft 3 1 +612.0 S-1 15 6 3 4 2 Light brown fine to coarse SAND, some fine to coarse gravel, trace silt (dry) [SP] (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 5 SS Elev. (ft) 4" diameter steel Casing Depth (ft) 9.0 Drop (in) 30 S-2 at 2 ft 20 25 3 S-2 SS Sampler Hammer Number of Samples Coring (min) Sampler 19.0 ft 3-7/8in Tricone Roller Bit Casing Diameter (in) Casing Hammer 12/13/2024 Completion Depth Size and Type of Bit 24 29 5 Brown Gravelly fine to coarse SAND, trace silt (dry) [SP] 53 Rig Chattering from 3 ft to 4 ft . 28 4 Drove casing to 5 ft. Drilled to 5 ft . S-3 at 5 ft 13 7 Decomposed Rock in form, brown to gray fine to coarse GRAVEL, some fine to coarse sand, trace silt (moist) [DECOMPOSED ROCK] SS +607.0 S-3 15 S-4 SS 17 6 4 35 18 24 70 8 +605.0 9 Gray BASALT [BEDROCK] 70 S-4 at 7 ft Rig Chattering. Stopped drilling for the day at 1:50 pm on 12/12/2024. Resumed drilling at 7:25 am on 12/13/24. Drove casing to 9 ft. Drilled to 9 ft. C-1 at 9 ft 02:18 02:03 C-1 12 01:35 RQD=46"/60"=77% 11 REC=56"/60"=93% 10 03:01 NQ Material Symbol Sheet Project No. Brownish gray wash. 13 01:43 14 Gray BASALT [BEDROCK] C-2 at 14 ft 01:28 15 02:35 16 Template: Log-BH; Strip: BH-GEO; Printed on 01/03/2025

LB-3 Log of Boring Project West Essex Highlands 2 of 2 101049801 Location Elevation and Datum +598.0 Type Sample Data Recov. (in) Penetrresist BL/6in Sample Description Depth Scale Number 16 Remarks (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 re RQD=40"/60"=67% 7 BL C-2 18 NQ 17 01:58 N-Value (Blows/ft) Light gray wash. 02:01 Re REC=52"/60"=87% Elev. (ft) Approx. el. 614.0 (NAVD 88) Coring (min) New Jersey, West Orange Material Symbol Sheet Project No. 02:37 +595.0 End of Boring at 19.0ft. 19 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 01/03/2025 Stopped drilling on 12/13/2024 at 9:15 AM. Upon completion, borehole backfilled with cuttings and hole plug.

LB-4 Log of Boring Project West Essex Highlands 1 of 3 101049801 Location Elevation and Datum West Orange, New Jersey Approx. el. 548.0 (NAVD 88) Drilling Company Date Started Date Finished Craig Geotechnical Drilling Co., Inc. 12/13/2024 Drilling Equipment Rock Depth ATV Rig 140 Drop (in) Sample Description +548.0 Tannish brown SILT, some fine to coarse sand, trace coarse gravel (moist) [TOPSOIL] Brown Gravelly fine to medium SAND, trace silt (moist) [SP] Depth Scale Sample Data 0 1 N/A - S-1 5 Began drilling 12/13/2024 at 10:23 AM. S-1 at 0 ft 5 3 3 2 (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 2 S-2 at 2 ft 11 20 S-2 12 47 27 Rig Chattering from 3 ft to 4 ft. 53 5 Drove casing to 5 ft. Drilled to 5 ft. S-3 at 5 ft 7 S-3 SS 10 6 14 23 13 18 7 S-4 at 7 ft. Rig Chattering from 7 ft to 9 ft. Brown wash. 22 S-4 SS 30 8 12 26 10 Dark brown wash. Drove casing to 10 ft. Drilled to 10 ft. S-5 at 10 ft 40 S-5 SS 11 56 26 9 No Recovery N/A - 24 HR. Remarks N-Value (Blows/ft) 2 4 Brown fine to coarse SAND, trace silt, some fine to coarse gravel (moist) [SP] N/A Core Rebecca Blocker 30 3 Brown fine to coarse SAND, trace silt, some fine gravel (moist) [SP] Completion 0 Matt Michelotti 1 +546.0 13 Field Engineer 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) Not Encountered Disturbed First SS 4" diameter steel Casing Depth (ft) 25.0 Drop (in) 30 SS Sampler Hammer Number of Samples Coring (min) Sampler 45.1 ft 3-7/8in Tricone Roller Bit Casing Diameter (in) Casing Hammer 12/17/2024 Completion Depth Size and Type of Bit 56 0 60 116 Rig chattering from 11 ft to 15 ft. Spoon bouncing. +536.0 Reddish brown fine to coarse SAND, some silt, some fine to coarse gravel (moist) [SM] 12 29 13 S-6 5 No Recovery [BOULDER] 15 52 23 19 14 +533.0 S-6 at 12 ft 15 SS Material Symbol Sheet Project No. Drove casing to 15 ft. Drilled to 15 ft. S-7 at 15 ft 11 10 16 Template: Log-BH; Strip: BH-GEO; Printed on 01/03/2025

LB-4 Log of Boring Project West Essex Highlands 2 of 3 101049801 Location Elevation and Datum +532.0 16 Type Sample Data S-7 Recov. (in) Penetrresist BL/6in Sample Description Depth Scale Number Elev. (ft) Approx. el. 548.0 (NAVD 88) Coring (min) New Jersey, West Orange Material Symbol Sheet Project No. 1 Remarks N-Value (Blows/ft) (Drilling Fluid, Casing Depth, Fluid Loss, Drilling Resistance, etc.) 10 20 30 40 12 22 15 17 Rig chattering from 17 ft to 19 ft. 18 01:49 00:48 +525.0 Reddish brown fine to medium SAND, some silt (moist) [SM] C-1 0 40/3" RQD=0% 02:08 S-8 REC=8% 20 No Recovery SANDSTONE [BOULDER] SS +528.0 +527.8 NQ 19 40/3" 21 22 Drove casing to 20 ft. Drilled to 20 ft. S-8 at 20 ft Spoon bouncing. Drove casing to 20 ft. Drilled to 20 ft. C-1 at 20.25 ft 23 Drop while coring. Stop core run. 00:07 24 25 Drove casing to 25 ft. Drilled to 25 ft. S-9 at 25 ft 13 S-9 SS 12 26 7 21 9 18 27 28 29 30 Drilled to 30 ft. S-10 at 30 ft S-10 SS 39 12 S-11 SS Reddish brown fine to medium SAND, some silt (moist) [SM] 2 88 50/2" 50/2" 80/3" 80/3" 31 32 33 34 Reddish brown fine to medium SAND, some silt (moist) [SM] 35 36 Template: Log-BH; Strip: BH-GEO; Printed on 01/03/2025 Drilled to 35 ft. S-11 at 35 ft