O30 Princeton Hydro Report Dated 9 3 25

West Essex Highlands Review West Orange, NJ Permit No. 722-04-0001.1 LUP230001 April 2025 northwest of the basin and the SHWT is indicated to be at an elevation of 545, a foot above the basin bottom. It is important to reiterate that no redoximorphic features were identified by the applicant's professionals in any of the borings. Figure 5: Proposed Grading Plan with Blue Arrows showing the existing drainage path and the Fuchsia arrows showing the proposed drainage paths and how the runoff is being diverted from the wetlands. Both BMP 2 and 7 are proposed to be excavated to an elevation below nearby wetlands. In these cases, the proposed BMP would result in the disruption of the current hydrologic gradient toward the wetland to one that redirects the hydrologic gradient toward the BMPs from the wetland. This will not only impact the wetland but will add an additional source of water to the BMPs that has not been identified by the applicant. This is especially relevant for BMP 7 where the basin is proposed to be excavated to an elevation approximately 16.5 feet lower than the delineated wetland located a little over 50 feet to the north of the basin. The relationship of wetlands and state open waters to infiltration basins should have been considered in the design of the proposed stormwater BMPS as the current design will not just impact the function of the BMPs but also impact the wetlands. The impacts to the wetlands related to changes in hydrology also warrants reconsideration by the NJDEP as it relates to the 401 Water Quality Certification the NJDEP granted to this applicant. Princeton Hydro, LLC Page | 16