Exhibit O1 Boswell Engineering Verona Report

2|Page July 26, 2024 Re: West Essex Highlands LLC Preliminary and Final Site Plan Application Block 179, Lot 32 Warner Road BE Project No. VA-183 4, 10. The Overall Site Plan depicts deer fence encompassing 17.9 acres within the easterly portion of the site within the Peckman River watershed. The plan label indicates this area is to be vacant. In order to prevent future detrimental impacts on the Peckman River, this area should be placed into a permanent conservation eastement. Site Plan E and F (sheets SP-9 and SP-10) and Grading Plan E and F (sheets SP-16 and SP-17) depict building D1 and D2 generally being constructed along the ridgeline that divides the two HUC-14 watersheds. The predevelopment and overall drainage area map indicate the proposed improvements associated with building D, including the roof, are within the Canoe Brook watershed area. Based on the utility plans, a portion of the runoff area behind proposed building D1 will be collected via two inlets that will drain under the building footprint to the front of the building into the drainage system (DA#4) that is being designed to discharge to the Canoe Brook tributary. The remainder of the area behind building D1 appears to drain to a low point at what appears to be a proposed patio area. It is not clear how runoff to this area is being addressed, although the Overall Drainage Area Map indicates this area will drain to DA#4 and DA#5, both of which are within the Canoe Brook watershed. It appears additional information needs to be provided in this area to confirm the area will discharge within DA#4 and DA#5, both of which ultimately discharge to Canoe Brook. If the area were to discharge towards the east to the Peckman River watershed, then an additional analysis point would need to be provided to confirm compliance with the applicable stormwater management rules. It is our recommendation that the area be collected with additional inlets/piping and piped to DA#4 and DA#5 consistent with the drainage area map. Based on the proposed grading, the area behind proposed building D2 is proposed to drain to the Canoe Brook watershed area and is depicted within DA#S. The limit of disturbance behind buildings D1 and D2 varies from approximately 15” to 30’. It is recommended the limit of disturbance as currently depicted on the plans be staked out prior to construction and the existing wooded

hind buildings D1 and D2 varies from approximately 15” to 30’. It is recommended the limit of disturbance as currently depicted on the plans be staked out prior to construction and the existing wooded area protected with tree protection fencing. The predevelopment drainage area map depicts DA#6 which includes a portion of the emergency access drive that is being constructed along the north side of building D1 that will connect to an existing cul-de-sac at Howell Drive, located in the Township of West Orange. This portion of the proposed emergency access is within the Peckman River watershed area. The Grading Plan F (Sheet SP-17) and Utility Plan F (sheet SP-24) depict the emergency access and it scales approximately 150 feet long by 16 feet wide. The design indicates 130 linear feet of porous pavement will be utilized within the access to provide water quality, water quantity and groundwater recharge. It is noted that the NJDEP BMP Manual limits the slope of porous pavement to 5% while the proposed grading indicates a design slope of 9.2% so the use of porous pavement in this application is not acceptable. It is not clear how BOSWELL ——— ENGINEERING