13026 Resubmission

Geotechnical Engineering Investigation Report JMA02P003.05- 08/19/2025 262-270 Main St 3.1.1 Results The soils encountered in this region varied between boring locations. Overburden soils comprised of mainly Silt Gravel (GM) and Silty Sand (SP-SM), with bedrock encountered at approximately 30ft BGS on Boring 1, and approximately 9.5ft BGS on Boring 2. The overall test results can be found in Appendix C: Laboratory Testing Results. The generalized subsurface profile of the site conditions for this region provided in Table 3 – Unconfined Compression Test Results of Intact Rock Core per ASTM D 2938 Unconfined Boring Depth Density of Rock Core Compression Strength ID Encountered (lb/ft^3) (psi) B-1 30’ 8,620 158.15 Table 4 has been developed based on the field observations. Hudson Engineering notes that this profile is a simplified representation of the site’s geology and that the typed soil Boring logs provided in Appendix B: Soil Boring Logs should be consulted for detailed information as soil and bedrock depths vary from location to location. The approximate depths of the groundwater table during the field investigations were noted in Table 3 – Unconfined Compression Test Results of Intact Rock Core per ASTM D 2938 Unconfined Boring Depth Density of Rock Core Compression Strength ID Encountered (lb/ft^3) (psi) B-1 30’ 8,620 158.15 Table 4. It should be noted that groundwater is ephemeral and may fluctuate due to seasonal and climatic influences. 4 Construction Recommendations 4.1 Foundation

8,620 158.15 Table 4. It should be noted that groundwater is ephemeral and may fluctuate due to seasonal and climatic influences. 4 Construction Recommendations 4.1 Foundation Recommendations Hudson Engineering recommends excavating to a depth of 6ft BGS and installing reinforced concrete strip footings along the bottom of the building. The soil layers at this depth consist of Silty Sand (SP-SM) and Silty Gravel (GM), in which the buildings footing will bear upon. These footings shall be designed to limit the loading to 3,500psf. 4.2 Foundation Moisture Protection Furthermore, due to the possibility of perched water tables occurring during rain events it is recommended to install an exterior moisture protection system on the foundation. This requires the proper installation of an Exterior French Drain System and Exterior Foundation Wall Water Proofing. This installation would consist of the following: • French Drain Installation: ○ Install sump pump or exteriorly draining system. ○ Excavate a trench around the exterior portion of the foundation walls (if not already exposed) − Trench shall be approximately 2ft wide and excavated down to approximately 3” above the existing foundation wall footing. ○ Install 6” of 3/4"clean crushed bedding stone inside trench. ○ Install 4” diameter perforated PVC pipe ○ Surround Pipe with minimum 6” layer of clean stone. ○ Completely wrap 3/4" stone and pipe with filter fabric ○ Install 6” layer of coarse sand around filter fabric. 3