256-25 Proposal FPA - West Orange - MS4 Compliance.pdf

MS4 Mapping Section 1 | Scope of Work Once the AGOL organization is provisioned, FPA will immediately begin setup: configuring organizational security, creating users with corresponding roles and groups, and deploying basemaps and layers for the stormwater inventory. Throughout the initial deployment, FPA will provide training for Township staff in the use of the newly configured GIS web mapping application. The AGOL organization established for the MS4 inventory is a single, scalable platform that can be leveraged across the Township for a wide array of future GIS initiatives—such as sanitary sewer mapping, pavement asset management, vegetation inventories, and emergency response planning. TASK 3: WATERSHED IMPROVEMENT PLAN Phase I – Watershed Inventory Report The Watershed Inventory Report constitutes the foundational element of the Watershed Improvement Plan, setting the data baseline for all subsequent analyses. Its primary objective is to compile a comprehensive, municipality‑wide inventory of all stormwater related assets and conditions that influence water quality and flooding risk within and adjacent to the town. By establishing this inventory, we ensure that planning steps are grounded in an accurate, up‑to‑date understanding of the stormwater infrastructure, regulatory compliance status, and environmental sensitivities. The inventory report will also serve as a reference for future reviews, enabling a benchmark status of the TMDL and impairment levels of the municipality. The inventory will rely on multiple data sources to achieve completeness. Existing data will provide the base for outfall mapping, which was mandated in the original permitting requirements for Tier A municipalities. We will supplement this with the NJDEP GIS database (https://gisdata-njdep.opendata.arcgis.com/ ) for publicly available layers such as impervious area, land use, and overburdened community boundaries. Additional field verification will be carried out to confirm the location of private stormwater outfalls, basins, and infrastructure not currently recorded in the GIS. We will conduct GIS‑based buffer analyses to delineate drainage areas for each outfall and interconnection point. One of the key deliverables of Phase I is mapping that visually integrates all inventory items. FPA will create a multi‑layer map that overlays outfall locations, HUC-14 areas, drainage

nection point. One of the key deliverables of Phase I is mapping that visually integrates all inventory items. FPA will create a multi‑layer map that overlays outfall locations, HUC-14 areas, drainage basins, receiving water bodies, and water‑quality classification segments. GIS tools will be utilized to calculate the drainage area for each outfall and interconnection. This map will be rendered in PDF and shapefile formats to meet the Department’s submission requirements and to facilitate future stakeholder workshops and public meetings. In alignment with NJDEP’s Phase I guidance, the Watershed Inventory will include all waters within or bordering the municipality that are listed in the TMDL Look-Up Tool. For each segment, we will document the applicable TMDL pollutant parameters and impairment status. This information will be cross-referenced with the municipality’s existing stormwater outfall data to identify connections between outfalls and impaired waters. The final Phase I deliverables will consist of: 1. A written Watershed Inventory Report summarizing all collected data. 2. Electronic maps with full metadata, incorporating all required features per NJDEP guidance. These materials will be submitted to NJDEP following municipal authorization. Phase II – Watershed Assessment Report Phase II builds on the inventory from the Watershed Inventory Reports. This phase will evaluate the potential for water‑quality improvement across each sub‑watershed. The Assessment Report will prioritize projects by pollutants and by their projected percent reduction in TMDL or impaired loadings based on NJDEP’s WIP project Matrix. It will also quantify the expected benefits in terms of flooding mitigation, thereby linking water‑quality and flood‑control objectives. Township of West Orange October 30, 2025 | Page 5