2025 10 27 Drainage Statement Rev 1

EXISTING CONDITIONS The property in question is located on Block 109, Lot 1.01 and Block 111, Lot 1.05 per the Township of West Orange Tax Map. The property is further identified as Chit Chat Diner and is located on the southerly side of Eagle Rock Avenue. The property is comprised of two irregularly shaped lots and has an area of approximately 192,631 square feet (4.42 acres). The site generally slopes from east to west with stormwater runoff flowing from the rear south-westerly portion of the property to the front of the property towards Eagle Rock Avenue. The property is developed with a two-story stone building, paver walkway, outdoor seating and paved parking area. The existing impervious coverage of the subject site is approximately 50,932 square feet (1.17 acres). Stormwater currently flows into a subsurface detention basin located at the rear parking area and into a subsurface detention basin located on the easterly parking area. Both systems ultimately flow into the county drainage system along Eagle Rock Avenue. SOILS INVESTIGATION Prior to the stormwater management design, a soils investigation was performed to determine the soil’s permeability as well as to locate potential groundwater and bedrock. Three (3) test pits were performed in the desired parking expansion area, and the test results provided a soil permeability rate of 0.2 to 0.6 inch per hour. Additionally, bedrock was observed in all the test pits between 4’0” and 5’-6” below the surface. With the bedrock established relatively close to the surface and the clay material above the rock, the existing surfaces act as impervious in the un-built condition. PROPOSED DEVELOPMENT The Applicant is proposing an expansion of the parking area for additional parking spaces to accommodate existing customers and to lessen the reliance on off-site employee parking. The Applicant is proposing a net additional fifteen (15) physical parking spaces, of which four (4) will be EV-ready. With the EV credit applied, the total number of additional spaces proposed in relation to the zoning requirement is nineteen (19) spaces. Surrounding the proposed parking area will be block curb, a metal fence and a timber guide rail that matches the existing. The proposed parking area will include twelve (12) new plantings within the proposed islands and around the parking area to meet West Orange Tree Ordinance. It

er guide rail that matches the existing. The proposed parking area will include twelve (12) new plantings within the proposed islands and around the parking area to meet West Orange Tree Ordinance. It should be noted that the circulation for the proposed parking area will be one way with the appropriate signage provided. Additionally, the parking area will be illuminated with the proposed fixtures similar to those recently installed as shown on the plans. 2