O30 Princeton Hydro Report Dated 9 3 25

West Essex Highlands Review West Orange, NJ Permit No. 722-04-0001.1 LUP230001 April 2025 P Vi ELEY DDb.¥D QIo ried | ~ 4938 3 3 114 LF of 8” SOR-35 PVC @ 1.01% Fe al — Lvc:_{00.00 gs oie bisakes aN] E 5 + ‘SAN-MH2 al” al Z| alg STA: 5+32.73 OFF:6.92R alg g al : g 3 g Sis T6:586.09 . ted s 1 a (SAN-MH3) INV JN: 563.65 8" PVC iy im im PUMP STATION-MH1) INV OUT: 563.55 B” JPVC ¥ ¥ BVCE: 569.21 EVCE: 566.40 BVCS:_3+50.00 EVCS:_ 4450.00 124 LF of 8 ["” uF oO i \ qe ~ = | STA:6+27.86 OFF | Ly: RIM: | INV IN: 565.00 15 PUMP STATION-MH1 7 INV OUT: 565.00 15} STA:6+49.3} RIM: 570.66 D-MH.1 “DEPTH: 8.2: Figure! 1: Profile of BMP 9 showing a sanitary line traveling through the BMP. 3.0 SUMMARY RIM: 565.80 | | STA: 5+06.42 OFF: INV IN: 558.00 15” INV IN: 562.90 8” PVC INV IN: 563.90 8" PVC In conclusion, our detailed review has found that the application is not in compliance with applicable State and local stormwater requirements (§25-29). It is the professional opinion of Princeton Hydro that the application does not meet all three central performance requirements of the local stormwater ordinance or the requirements of N.J.A.C. 7:8. The applicant's failure to meet the minimum requirements of N.J.A.C. 7:8. And the New Jersey BMP Manual will increase peak flow downstream of the Site. The increase in peak flow would be made even worse when applying the new rainfall data. Since the project has not demonstrated compliance with all three specific stormwater management requirements of the central goals of stormwater management planning as outlined in N.J.A.C. 7:8 and §25-29 of the local general ordinance, in our professional opinion, the application is non-approvable as designed. If the application is approved as designed, the development will increase the frequency and severity of damage expected during a flood in the adjacent and downstream areas. Princeton Hydro, LLC Page | 22