CED_24006174A_250227_FSD_AHE_Geotechnical Data Report

Soil Stratification The test pits encountered the site soils exposed at the surface. The site soils generally consist of silt loam, silt clay loam, loamy sand, varying amounts of gravel/boulders. The test pits were terminated within these soils. The test pit logs are presented in Appendix A. Soils encountered were classified in the field in general accordance with the USDA Soil Classification System, a summary of which is presented in Appendix A. General Groundwater Observations Groundwater conditions were not encountered within the test pits during the time of our exploration. Groundwater observations noted above reflect the conditions at the time of our onsite presence. Note that groundwater levels can fluctuate with locations, seasonal changes, precipitation, nearby construction activities, foreign influences such as leakage into and out of utilities, and other factors. Pockets or seams of gravels, sands, silts, or open fractures and joints can store and transmit “perched” groundwater flow or seepage. In-situ Infiltration Testing Proposed Stormwater Facilities Test pit TP-01 was terminated before reaching the bottom of the proposed stormwater facility due to concerns of damaging existing subsurface utilities at the request of the general contractor. Test Pits TP-04 and TP-05 were terminated before reaching the bottom of the proposed stormwater facility due to refusal on bedrock at depths ranging up to 12.5 ft below existing grades. Test Pits TP-02 and TP-03 were terminated at depths ranging up to 9 ft below existing grades due to refusal on bedrock. A single ring infiltrometer test was performed within Test Pit TP-03. The single ring infiltrometer test was performed in accordance with Chapter 12 of the New Jersey BMP Manual. A summary of the single ring infiltrometer test is presented in Table 1. Measured Field Intake Rate Table 1 presents a summary of the in-situ infiltration test performed and corresponding result. The result of the in-situ infiltrations test is presented in Appendix B. Table 1. Summary of In-Situ Infiltration Test Location ID Test Depth (ft) TP-03 3.5 Soil Description (see logs for full description) Loamy Sand GEOTECHNICAL DATA REPORT | February 27, 2025 Test Type Measured Field Intake Rate (in/hr) Single Ring 6.2 in/hr Page 2