12 2026 02 12 Crestmont CC Stormwater Management Report

1017 Greeley Ave N Union, NJ 07083 908-964-0786 www.RSAGeolab.com Tube Permeameter Test Client: Langan Eng. & Env. Services, Inc. Job No.: 869 Project: Eagle Rock Ave Widening Project Lab Log No.: L#25-4128 Proj. No. 101049802 Sample: TP-21, ST-1, 1.67' Date: 4/29/2025 Average Length of Soil Core 4.070 in. Initial Weight of Soil Core 866.2 grams Final Weight of Soil Core 868.8 grams Dry Weight of Soil Core 720.9 grams Diameter of Shelby Tube 2.875 in. Initial Moisture Content 20.16% Diameter of Standpipe 0.250 in. Final Moisture Content 20.52% Wet Density, Initial 124.89 PCF Wet Density, Final 125.27 PCF Dry Density 103.94 PCF Initial Height Final Height Change in Water Level Time Interval Hydraulic Conductivity Trial No. (inches) (inches) (inches) (secs) cm/sec in/hr 1 39.3 38.8 0.5 1460.0 6.86E-07 9.72E-04

cm/sec in/hr 1 39.3 38.8 0.5 1460.0 6.86E-07 9.72E-04 2 38.8 38.3 0.5 1470.0 6.90E-07 9.78E-04 3 38.3 37.7 0.6 1760.0 7.01E-07 9.94E-04 Average Hydraulic Conductivity 6.92E-07 cm/sec 9.81E-04 in/hr Remarks: 1. Test Conducted Using Daired Tap Water at Standard Temp. (72° F) 2. 100% Saturation Assumed Tested by: SP Checked by: KP