2026 02 12 Crestmont CC and Eagle Rock Ave Stormwater Management Report

APPENDIX C LABORATORY TESTING RESULTS LANGAN

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-1 S-1 24"-36" Date: 5/24/2024 Average Length of Soil Core 4.321 in. Initial Weight of Soil Core 904.3 grams Final Weight of Soil Core 917.0 grams Dry Weight of Soil Core 763.7 grams Diameter of Shelby Tube 2.875 in. Initial Moisture Content 18.41% Diameter of Standpipe 0.250 in. Final Moisture Content 20.07% Wet Density, Initial 122.81 PCF Wet Density, Final 124.54 PCF Dry Density 103.72 PCF Initial Height Final Height Change in Water Level Time Interval Hydraulic Conductivity Trial No. (inches) (inches) (inches) (secs) cm/sec in/hr 1 39.5

(inches) (secs) cm/sec in/hr 1 39.5 38.4 1.1 1760.0 1.33E-06 1.89E-03 2 38.4 37.2 1.2 1800.0 1.46E-06 2.07E-03 3 37.2 36.0 1.2 1840.0 1.48E-06 2.10E-03 Average Hydraulic Conductivity 1.42E-06 cm/sec 2.02E-03 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 9.0 7.8 3.2 9.8 19.3 50.9 SIEVE PERCENT SPEC.* PASS? Material Description SIZE FINER PERCENT (X=NO) Yellowish Brown 1.5 100.0 1 91.0 .75 91.0 .5 86.9 Atterberg Limits PL= LL= PI= .375 86.0 #4 83.2 Coefficients #10 80.0

Coefficients #10 80.0 D90= 16.6181 D85= 7.0062 D60= 0.1887 #30 73.4 D50= D30= D15= #40 70.2 D10= C u= Cc= #60 63.7 Classification #100 57.3 USCS= AASHTO= #200 50.9 Remarks * (no specification provided) Sample Number: TP-1 S-1 24-36" 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

Union, New Jersey 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-3 S-1 1'-2' Date: 5/24/2024 Average Length of Soil Core 3.435 in. Initial Weight of Soil Core 753.3 grams Final Weight of Soil Core 754.1 grams Dry Weight of Soil Core 634.7 grams Diameter of Shelby Tube 2.875 in. Initial Moisture Content 18.67% Diameter of Standpipe 0.250 in. Final Moisture Content 18.81% Wet Density, Initial 128.69 PCF Wet Density, Final 128.84 PCF Dry Density 108.44 PCF Initial Height Final Height Change in Water Level Time Interval Hydraulic Conductivity Trial No. (inches) (inches) (inches) (secs) cm/sec in/hr 1 39.9

(inches) (secs) cm/sec in/hr 1 39.9 39.0 0.9 480.0 3.14E-06 4.44E-03 2 39.0 38.0 1.0 540.0 3.17E-06 4.50E-03 3 38.0 37.0 1.0 550.0 3.20E-06 4.53E-03 Average Hydraulic Conductivity 3.17E-06 cm/sec 4.49E-03 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