12 2026 02 12 Crestmont CC Stormwater Management Report

(inches) (secs) cm/sec in/hr 1 39.2 38.9 0.3 2140.0 2.99E-07 4.23E-04 2 38.9 38.6 0.3 2200.0 2.93E-07 4.15E-04 3 38.6 38.3 0.3 2220.0 2.92E-07 4.14E-04 Average Hydraulic Conductivity 2.95E-07 cm/sec 4.17E-04 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 0.1 0.3 1.4 5.2 93.0 SIEVE PERCENT SPEC.* PASS? Material Description SIZE FINER PERCENT (X=NO) Dark Yellowish Brown .375 100.0 #4 99.9 #10 99.6 #30 98.8 Atterberg Limits PL= LL= PI= #40 98.2 #60 97.0 Coefficients #100 95.6

Coefficients #100 95.6 D90= D85= D60= #200 93.0 D50= D30= D15= D10= C u= Cc= Classification USCS= AASHTO= Remarks * (no specification provided) Sample Number: TP-6 S-1 1.5-2.5' 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 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-7 S-1 8"-18" Date: 5/24/2024 Average Length of Soil Core 3.746 in. Initial Weight of Soil Core 782.1 grams Final Weight of Soil Core 802.4 grams Dry Weight of Soil Core 670.1 grams Diameter of Shelby Tube 2.875 in. Initial Moisture Content 16.72% Diameter of Standpipe 0.250 in. Final Moisture Content 19.75% Wet Density, Initial 122.52 PCF Wet Density, Final 125.69 PCF Dry Density 104.97 PCF Initial Height Final Height Change in Water Level Time Interval Hydraulic Conductivity Trial No. (inches) (inches) (inches) (secs) cm/sec in/hr 1 39.6

(inches) (secs) cm/sec in/hr 1 39.6 35.0 4.6 520.0 1.71E-05 2.42E-02 2 35.0 31.0 4.0 490.0 1.78E-05 2.53E-02 3 31.0 27.2 3.8 505.0 1.86E-05 2.64E-02 Average Hydraulic Conductivity 1.78E-05 cm/sec 2.53E-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 6.7 8.4 3.4 8.6 16.7 56.2 SIEVE PERCENT SPEC.* PASS? Material Description SIZE FINER PERCENT (X=NO) Dark Yellowish Brown 1 100.0 .75 93.3 .5 89.7 .375 89.0 Atterberg Limits PL= LL= PI= #4 84.9 #10 81.5 Coefficients #30 75.5

Coefficients #30 75.5 D90= 13.8814 D85= 4.8593 D60= 0.1250 #40 72.9 D50= D30= D15= #60 67.2 D10= C u= Cc= #100 61.6 Classification #200 56.2 USCS= AASHTO= Remarks * (no specification provided) Sample Number: TP-7 S-1 8-18" 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