Minimal disturbance of the weathered coastal plain formations, upper stream terrace deposits and alluvium will occur as a result of grading, subsurface utility installation, foundation construction, and associated earth disturbances. Such disturbances will displace and modify underlying sands and gravel, which will remain on-site during construction of the site improvements. There are no geologic limitations including faults or impermeable bedrock that may pose development limitations.
According to the Stormwater Report prepared by Eric Halpert, PE and dated October 6, 2025, the stormwater management system consists of 2 surface infiltration basins and individual subsurface basins for each dwelling. Surface runoff from the site is partially directed to the 2 surface basins for water quality treatment and attenuation. Runoff from remaining woodland area of the property is not captured in the proposed stormwater facilities. Each proposed roof runoff is directed to the individual lot subsurface basin. An outlet control structure is proposed in each surface basin which will direct runoff in excess of the water quality storm via a 15" (Surface #1) and 6" (Surface #2) outlet pipe to convey excess runoff beyond required reductions to a swale near the property limit. The stormwater management system has been designed to manage the increase in runoff in conformance with Township, NJDEP and Soil Conservation District standards.
The project will be serviced by public sewer and water. No well features or individual subsurface septic systems are proposed that would have the potential to impact groundwater or other geologic features.
Subsurface conditions support effective groundwater recharge and stormwater infiltration without adverse impacts to groundwater mounding, slope stability, or soil structure. Groundwater mounding analyses demonstrate that the proposed infiltration basins maintain adequate vertical separation between basin bottoms and the seasonal high water table under the one hundred year storm condition, thereby preserving soil treatment capacity and preventing groundwater breakout or surface instability.
Potential impacts to subsurface water quality are minimized through the use of green infrastructure infiltration systems that provide pretreatment and filtration of stormwater runoff prior to recharge. The majority of runoff will infiltrate on site, maintaining existing groundwater recharge patterns and reducing off site discharge volumes. Roof runoff is segregated and infiltrated directly, further reducing pollutant loading. No dewatering activities or permanent groundwater withdrawals are proposed.
The proposed development does not involve blasting, deep foundations, or excavation into competent bedrock formations. Earthwork activities will be limited to shallow grading and utility trenching within unconsolidated soils and will not alter regional groundwater flow regimes or aquifer characteristics. Construction activities will comply with soil erosion and sediment control requirements to prevent sediment migration into subsurface infiltration systems.
Potential impacts to site soils and subsurface water resources are minimized through the use of low impact site design and infiltration based stormwater management systems that maintain natural groundwater recharge and limit off site discharge. Stormwater runoff is treated through surface infiltration basins and individual subsurface systems that provide filtration and pollutant removal prior to recharge, protecting groundwater quality.
All excavation and grading shall be performed in accordance with the site plan which includes soil erosion and sediment control provisions to prevent the displacement and translocation of exposed geologic sediments. The proposed project will adhere to an approved Soil Erosion and Sediment Control Plan which