12 2026 02 12 Crestmont CC Stormwater Management Report

60 50 40 30 20 10 0 100 10 1 0.1 0.01 0.001 GRAIN SIZE - mm. % Gravel % Sand % Fines % +3" Coarse Fine Coarse Medium Fine Silt Clay 0.0 0.0 7.7 4.7 10.3 25.6 51.7 SIEVE PERCENT SPEC.* PASS? Material Description SIZE FINER PERCENT (X=NO) Brown .75 100.0 .5 96.0 .375 95.5 #4 92.3 Atterberg Limits PL= LL= PI= #10 87.6 #30 80.6 Coefficients #40 77.3

Coefficients #40 77.3 D90= 3.1705 D85= 1.1826 D60= 0.1379 #60 69.9 D50= D30= D15= #100 61.3 D10= C u= Cc= #200 51.7 Classification USCS= AASHTO= Remarks * (no specification provided) Sample Number: TP-3 S-1 1-2' Date: 5-24-24 RSA Geolab Client: Langan Engineering Project: Eagle Rock Ave Widening Project, West Orange, NJ Project#101049801 Union, New Jersey Project No: 869 Figure Tested By: EE

Project No: 869 Figure Tested By: EE Checked By: KP

1017 Greeley Ave N Union, NJ 07083 908-964-0786 www.RSAGeolab.com Shelby Tybe Hydraulic Conductivity Test ASTM D2434 (For Calculations) Client: Langan Eng. & Env. Services, Inc. Job No.: 869 Project: Eagle Rock Ave Widening Project Lab Log No.: L#24-3391 Proj. No. 101049801 Sample: TP-5 S-1 1'-2' Date: 5/24/2024 Average Length of Soil Core 4.704 in. Initial Weight of Soil Core 997.3 grams Final Weight of Soil Core 1008.6 grams Dry Weight of Soil Core 813.7 grams Diameter of Shelby Tube 2.875 in. Initial Moisture Content 22.56% Diameter of Standpipe 0.250 in. Final Moisture Content 23.95% Wet Density, Initial 124.42 PCF Wet Density, Final 125.82 PCF Dry Density 101.51 PCF Initial Height Final Height Change in Water Level Time Interval Hydraulic Conductivity Trial No. (inches) (inches) (inches) (secs) cm/sec in/hr 1 39.8

(inches) (secs) cm/sec in/hr 1 39.8 29.6 10.2 780.0 3.43E-05 4.86E-02 2 39.8 29.0 10.8 840.0 3.40E-05 4.83E-02 3 39.6 29.5 10.1 780.0 3.41E-05 4.83E-02 Average Hydraulic Conductivity 3.41E-05 cm/sec 4.84E-02 in/hr Remarks: 1. Test Conducted Using Daired Tap Water at Standard Temp. (72° F) 2. 100% Saturation Assumed Tested by: AO Checked by: KP

Particle Size Distribution Report 1½ in. 3/8 in. ¾ in. ½ in. #100 #140 #200 6 in. 3 in. 2 in. 1 in. #10 #20 #30 #40 #60 #4 100 90 80 70 PERCENT FINER 60 50 40 30 20 10 0

60 50 40 30 20 10 0 100 10 1 0.1 0.01 0.001 GRAIN SIZE - mm. % Gravel % Sand % Fines % +3" Coarse Fine Coarse Medium Fine Silt Clay 0.0 0.0 33.2 10.5 2.1 7.6 46.6 SIEVE PERCENT SPEC.* PASS? Material Description SIZE FINER PERCENT (X=NO) Dark Yellowish Brown .75 100.0 .5 95.7 .375 91.2 #4 66.8 Atterberg Limits PL= LL= PI= #10 56.3 #30 55.1 Coefficients #40 54.2

Coefficients #40 54.2 D90= 9.0820 D85= 7.7631 D60= 3.4816 #60 52.4 D50= 0.1497 D30= D15= #100 50.0 D10= C u= Cc= #200 46.6 Classification USCS= AASHTO= Remarks * (no specification provided) Sample Number: TP-5 S-1 1-2' Date: 5-24-24 RSA Geolab Client: Langan Engineering Project: Eagle Rock Ave Widening Project, West Orange, NJ Project#101049801 Union, New Jersey Project No: 869 Figure Tested By: EE

Project No: 869 Figure Tested By: EE Checked By: KP

1017 Greeley Ave N Union, NJ 07083 908-964-0786 www.RSAGeolab.com Shelby Tybe Hydraulic Conductivity Test ASTM D2434 (For Calculations) Client: Langan Eng. & Env. Services, Inc. Job No.: 869 Project: Eagle Rock Ave Widening Project Lab Log No.: L#24-3391 Proj. No. 101049801 Sample: TP-6 S-1 1.5'-2.5' Date: 5/24/2024 Average Length of Soil Core 4.331 in. Initial Weight of Soil Core 890.4 grams Final Weight of Soil Core 893.3 grams Dry Weight of Soil Core 715.1 grams Diameter of Shelby Tube 2.875 in. Initial Moisture Content 24.51% Diameter of Standpipe 0.250 in. Final Moisture Content 24.93% Wet Density, Initial 120.64 PCF Wet Density, Final 121.04 PCF Dry Density 96.89 PCF Initial Height Final Height Change in Water Level Time Interval Hydraulic Conductivity Trial No. (inches) (inches) (inches) (secs) cm/sec in/hr 1 39.2