2025 10 27 Drainage Statement Rev 1

The total amount of disturbance on these lots for all the proposed work is 19,200 square feet (0.441 acres). The proposed improvements consist of 8,313 square feet (0.191 acres) of impervious coverage of which 7,878 square feet (0.181 acres) of improvements are motor vehicle surface. Because of the increase in impervious coverage on site, two (2) type ‘B’ inlets will be constructed within the expanded parking area. These inlets will connect to two (2) manholes via 12” HDPE pipes which will tie into the existing type ‘B’ inlet on site. STORMWATER MANAGEMENT Both the limit of disturbance (0.441 acres) and the new motor vehicle surface area (0.181 acres) are below the major development thresholds. No detention is provided since the shallow bedrock and clay material already represent an impervious condition. To account for the additional impervious coverage, the Applicant is proposing to install inlets and manholes to connect into the existing stormwater management system on site. This added pipe network will capture the stormwater runoff within the expanded parking area and direct it towards the existing storm sewer system located within the developed portion of the property. CONCLUSION To summarize, the improvements have been designed to provide additional parking stalls on the subject property. It is especially important to note that the proposed development will not have a negative impact on the neighboring properties as the stormwater runoff from the expansion will be captured by the proposed inlets and manholes and connect into the existing system in the parking lot. As such, there will be slight reduction in runoff that currently discharges to the steep slopes. 3