JMA02P003 262 270 Main Street Development Stormwater Management Report

E. What design criteria and/or site changes would be required to reduce the percentages in C and D above? The parking area would need to roughly match the existing driveway slope, which isn't practical since this would make it difficult to comply with ADA requirements. F. Specify site’s hydrologic soil group (HSG) percentages: HSG A: HSG B: HSG C: 100% HSG D: G. Specify percentage of each HSG that will be permanently disturbed: HSG A: HSG B: HSG C: 100% HSG D: H.Locating site disturbance within areas with less permeable soils (HSG C and D) and minimizing disturbance within areas with greater permeable soils (HSG A and B) can help maintain groundwater recharge rates and reduce runoff volume increases. In light of the HSG percentages in F and G above, what other practical measures if any can be taken to achieve this? None I. Does the site include Karst topography? Yes: No: X If yes, discuss measures taken to limit Karst impacts: New Jersey Stormwater BMP Manual • Appendix A: Low Impact Development Checklist • February 2004 • Page A-7

3.3 Impervious Area Management New impervious surfaces at a development site can have the greatest adverse effect on groundwater recharge and stormwater quality and quantity. This section of the checklist helps identify those nonstructural strategies and LID-BMPs that have been incorporated into a proposed development’s design to comprehensively manage the extent and impacts of new impervious surfaces. A. Specify impervious cover at site: Existing: 99% Proposed: 97% B. Specify maximum site impervious coverage allowed by regulations: 75% C. Compare proposed street cartway widths with those required by regulations: Proposed Cartway Required Cartway Type of Street Width (feet) Width (feet) Residential access – low intensity Residential access – medium intensity Residential access – high intensity with parking Residential access – high intensity without parking Neighborhood Minor collector – low intensity without parking Minor collector – with one parking lane Minor collector – with two parking lanes 24 24 Minor collector – without parking Major collector D. Compare proposed parking space dimensions with those required by regulations: Proposed: 9' x 18' Regulations: 9' x 18' E. Compare proposed number of parking spaces with those required by regulations: Proposed: 43 Regulations: 48 New Jersey Stormwater BMP Manual • Appendix A: Low Impact Development Checklist • February 2004 • Page A-8

F. Specify percentage of total site impervious cover created by buildings: 47.5% By driveways and parking: 52.5% By roadways: G. What design criteria and/or site changes would be required to reduce the percentages in F above? Reducing the square footage of the building and decreasing the size of the parking lot. H. Specify percentage of total impervious area that will be unconnected: Total site: 0% Buildings: Driveways and parking: Roads: I. Specify percentage of total impervious area that will be porous: Total site: Buildings: Driveways and parking: 19.4% Roads: J. Specify percentage of total building roof area that will be vegetated: 0% K. Specify percentage of total parking area located beneath buildings: 0% L. Specify percentage of total parking located within multi-level parking deck: 0% New Jersey Stormwater BMP Manual • Appendix A: Low Impact Development Checklist • February 2004 • Page A-9

3.4 Time of Concentration Modifications Decreasing a site’s time of concentration (Tc) can lead directly to increased site runoff rates which, in turn, can create new and/or aggravate existing erosion and flooding problems downstream. This section of the checklist helps identify those nonstructural strategies and LID-BMPs that have been incorporated into the proposed development’s design to effectively minimize such Tc decreases. When reviewing Tc modification strategies, it is important to remember that a drainage area’s Tc should reflect the general conditions throughout the area. As a result, Tc modifications must generally be applied throughout a drainage area, not just along a specific Tc route. A. Specify percentage of site’s total stormwater conveyance system length that will be: Storm sewer: Vegetated swale: Natural channel: Stormwater management facility: Other: Note: the total length of the stormwater conveyance system should be measured from the site’s downstream property line to the downstream limit of sheet flow at the system’s headwaters. B. What design criteria and/or site changes would be required to reduce the storm sewer percentages and increase the vegetated swale and natural channel percentages in A above? C. In conveyance system subareas that have overland or sheet flow over impervious surfaces or turf grass, what practical and effective site changes can be made to: Decrease overland flow slope: Increase overland flow roughness: New Jersey Stormwater BMP Manual • Appendix A: Low Impact Development Checklist • February 2004 • Page A-10

3.5 Preventative Source Controls The most effective way to address water quality concerns is by pollution prevention. This section of the checklist helps identify those nonstructural strategies and LID-BMPs that have been incorporated into the proposed development’s design to reduce the exposure of pollutants to prevent their release into the stormwater runoff. A. Trash Receptacles Specify the number of trash receptacles provided: 1 Specify the spacing between the trash receptacles: Compare trash receptacles proposed with those required by regulations: Proposed: 1 Regulations: 1 B. Pet Waste Stations Specify the number of pet waste stations provided: Specify the spacing between the pet waste stations: Compare pet waste stations proposed with those required by regulations: Proposed: Regulations: C. Inlets, Trash Racks, and Other Devices that Prevent Discharge of Large Trash and Debris Specify percentage of total inlets that comply with the NJPDES storm drain inlet criteria: D. Maintenance Specify the frequency of the following maintenance activities: Street sweeping: Proposed: Regulations: Litter collection: Proposed: Regulations: Identify other stormwater management measures on the site that prevent discharge of large trash and debris: New Jersey Stormwater BMP Manual • Appendix A: Low Impact Development Checklist • February 2004 • Page A-11

E. Prevention and Containment of Spills Identify locations where pollutants are located on the site, and the features that prevent these pollutants from being exposed to stormwater runoff: Pollutant: Location: Feature utilized to prevent pollutant exposure, harmful accumulation, or contain spills: Pollutant: Location: Feature utilized to prevent pollutant exposure, harmful accumulation, or contain spills: Pollutant: Location: Feature utilized to prevent pollutant exposure, harmful accumulation, or contain spills: Pollutant: Location: Feature utilized to prevent pollutant exposure, harmful accumulation, or contain spills: Pollutant: Location: New Jersey Stormwater BMP Manual • Appendix A: Low Impact Development Checklist • February 2004 • Page A-12

Part 4: Compliance with Nonstructural Requirements of NJDEP Stormwater Management Rules 1. Based upon the checklist responses above, indicate which nonstructural strategies have been incorporated into the proposed development’s design in accordance with N.J.A.C. 7:8-5.3(b): No. Nonstructural Strategy Yes No 1. Protect areas that provide water quality benefits or areas particularly susceptible to erosion and sediment loss. X 2. Minimize impervious surfaces and break up or disconnect the flow of runoff over impervious surfaces. X 3. Maximize the protection of natural drainage features and vegetation. X 4. Minimize the decrease in the pre-construction time of concentration. X 5. Minimize land disturbance including clearing and grading. X 6. Minimize soil compaction. X 7. Provide low maintenance landscaping that encourages retention and planting X of native vegetation and minimizes the use of lawns, fertilizers, and pesticides. 8. Provide vegetated open-channel conveyance systems discharge into and X through stable vegetated areas. 9. Provide preventative source controls. X 2. For those strategies that have not been incorporated into the proposed development’s design, provide engineering, environmental, and/or safety reasons. Attached additional pages as necessary. There is no natural vegetation onsite. It is not possible to protect vegetation that is not present. There were also no areas on site where it was feasible to have vegetated open-channel systems. New Jersey Stormwater BMP Manual • Appendix A: Low Impact Development Checklist • February 2004 • Page A-13