Report 4 13 2026

​ENSURPLAN, INC.​ ​ ww.Ensurplan.​​net​ w ​ ivil Engineers & Land Surveyors C Ph: (732) 469-0400​ ​Certificate of Authorization 24GA27997700​ ​STORMWATER DRAINAGE REPORT​ ​04/13/26​ ​Minor Subdivision 15 Ridgeway Ave West Orange, NJ​ ​Stormwater Quality​ ​ o comply with the Major Stormwater regulations water quality requirements, stormwater​ T ​management measures shall be designed to provide 80% reduction of the post-construction​ ​load of total suspended solids (TSS) in stormwater runoff generated from the water quality​ ​design storm over the net increase of motor vehicle surface.​ ​Design Methodology/Discussion​ ​ lean roof runoff and runoff from lawns, walkways, patios or decks do not have to be treated for​ C ​TSS removal.​ ​ herefore discussion of water quality provision on site is limited to the remaining impervious​ T ​surface comprising driveway cover. All proposed driveways on the site are specified to be​ ​constructed of a permeable pavement system. The system is rated to provide 80% TSS removal​ ​if the storage bed below the pavement can accommodate the water quality storm.​ ​ onstruction details provide a non-woven geotextile fabric underlain stone bed under all​ C ​permeable pavement with a minimum depth of 12” Void storage at a 40% ratio provides an​ ​effective depth of 4.8” well in excess of the water quality storm depth of 1.25”​ ​12​ ​Mailing Address: Post Office Box 4304, Warren, NJ 07059​