O30 Princeton Hydro Report Dated 9 3 25

West Essex Highlands Review West Orange, NJ Permit No. 722-04-0001.1 LUP230001 April 2025 The analysis of the existing drainage area for POA2 has yet another flaw. The drainage area for POA 2 has two clear discharge locations in the proposed condition, but it only assumes discharge location at Kuzik Road (see Figure 10). The design has two discharge locations, but the modeling assumes they are combined. The flows do eventually combine but that is approximately 600 ft into the adjacent neighborhood. The drainage area analysis must be reanalyzed as two separate drainage areas with two separate analyses to ensure the peak flow rate at both locations does not increase. It is difficult to understand at this time how this change will impact the proposed design but it could be substantial. This re-evaluation is necessary to ensure that the peak flow rate of runoff from the Site is compliant with the state and local regulations and to prevent downstream flooding. - y mae. sie ; = ND Cent SO Figure 10: These are images of DA-1 and DA-2 from the Stormwater report to demonstrate how the DA for POA 2 should be modeled as two separate DA's because there are two separate points of discharge 2.8 SEPARATION OF SANITARY INFRASTRUCTURE AND BMP The design has a sanitary pipe traveling through porous pavement system (Figure 11). While we are not aware of a specific rule against having a sanitary line traveling through a subsurface basin, it appears to be a poor design decision that is counter to the rules and common engineering design sense. The purpose of the distances is to prevent leaking sanitary pipes from entering the stormwater system and potentially causing an illicit discharge of raw wastewater. The design should be modified to relocate the sanitary pipe out of the subsurface system. This may require the project to have additional Flood Hazard and/or Wetlands Permitting depending on how the layout is impacted by this modification. Princeton Hydro, LLC Page | 21

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

West Essex Highlands Review 4 West Orange, NJ Permit No. 722-04-0001.1 LUP230001 April 2025 | appreciate the opportunity to provide you with these engineering services for you. Please do not hesitate to contact me with any questions regarding this review. My clients, We Care NJ would be pleased to meet with you so that we may discuss our concerns about the substantial stormwater issues associated with the proposed West Essex Highlands project. Please feel free to contact me at mgallagher@princetonhydro.com if you have any questions. Thank you. Sincerely, ea Gee CO Wile LE é Mark Gallagher Sean Walsh, PE Vice President Senior Project Manager Princeton Hydro, LLC Princeton Hydro, LLC File: P/2151.002/documents/permit review Attachments: Attachment A: Soil Report of Area from USDA, Boonton Soil Series Description, Haledon Soil Series Description, Hasbrouck Soil Series Description Attachment B: Location Map of Soil Borings taken by Princeton Hydro, Soil Boring Logs (Bor-1 to 4) ce: Dennis Contois (Dennis.Contois@dep.nj.gov) Vince Mazzei, Jr., P.E. (Vincent.Mazzei@dep.nj.gov) Jennifer Moriarity (Jennifer.Moriarty@dep.ni.gov) Colleen Keller (Colleen Keller@dep.nj.gov Clay Emerson, PE, CFM (Cemerson@Princetonhydro.com Joseph Pannullo {joe@pannullo.com) Bill Potter Esq. (potterrex@cs.com) Princeton Hydro, LLC Page | 23

West Essex Highlands Review 4 West Orange, NJ Permit No. 722-04-0001.1 LUP230001 April 2025 Attachment A USDA Official Soils Series Descriptions Princeton Hydro, LLC Page | 24

3/31/25, 1:10 PM Official Series Description - HASBROUCK Series LOCATION HASBROUCK NJ Established Series Rev. CFE-SG-SMF 01/2013 HASBROUCK SERIES The Hasbrouck series consists of very deep, poorly drained soils in depressions on uplands. They typically formed from eroded and redeposited glacial materials overlying till. Slope ranges from 0 to 8 percent. Saturated hydraulic conductivity is moderately high or high in the solum above the fragipan, moderately low or low in the fragipan, and moderately high or high in the substratum. Mean annual temperature is about 50 degrees F., and mean annual precipitation is about 44 inches. TAXONOMIC CLASS: Fine-loamy, mixed, active, mesic Typic Fragiaqualfs TYPICAL PEDON: Hasbrouck stony silt loam, 4 percent slope, wooded. (Colors are for moist soil unless otherwise stated.) A--0 to 8 cm; very dark gray (10YR 3/1) stony silt loam, gray (10YR 6/1) dry; moderate coarse granular structure; friable; common medium and fine roots; 10 percent stones, 15 percent cobbles and gravel; very strongly acid; clear wavy boundary. (5 to 15 cm thick) Eg--8 to 25 inches; grayish brown (10YR 5/2) and dark gray (10YR 4/1) stony silt loam; moderate coarse granular structure; friable; few fine and medium roots; 10 percent stones, 15 percent cobbles and gravel; common fine prominent brownish yellow (10YR 6/6) and olive yellow (2.5Y 6/6) redoximorphic concentrations; very strongly acid; gradual wavy boundary. (13 to 20 cm thick) BEg--25 to 36 cm; pinkish gray (7.5YR 6/2) gravelly loam; weak medium subangular blocky structure; friable; few fine roots; few faint clay films on faces of peds; 10 percent gravel, 5 percent cobbles; many fine and medium prominent yellowish brown (10YR 5/4) and brownish yellow (10YR 6/6) redoximorphic concentrations; moderately acid; gradual wavy boundary. (0 to 15 cm thick) Btg--36 to 61 inches; gray (5YR 6/1) sandy clay loam; moderate coarse subangular blocky structure; friable, plastic; few fine roots; many distinct clay films on faces of peds and clay bridging between sand grains; 10 percent gravel; many medium and coarse prominent reddish yellow (7.5YR 6/6) and brownish yellow (10YR 6/6) redoximorphic concentrations; slightly acid; abrupt wavy boundary. (25 to 41 cm thick) Bx--61 to 107 cm; reddish brown (SYR 4/4) gravelly sandy loam; weak thick platy structure; very firm, brittle; 25 percent gravel, 2

ntrations; slightly acid; abrupt wavy boundary. (25 to 41 cm thick) Bx--61 to 107 cm; reddish brown (SYR 4/4) gravelly sandy loam; weak thick platy structure; very firm, brittle; 25 percent gravel, 2 percent cobbles; few faint strong brown (7.5YR 5/6) clay films on faces of peds; few black (N2/0) stains; slightly acid; abrupt smooth boundary. (28 to 76 cm thick) C--107 to 183 cm; reddish brown (5YR 4/4) gravelly sandy loam; weak very thick platy structure grading to massive within 152 cm; friable; 25 percent gravel, 5 percent cobbles; neutral. TYPE LOCATION: Passaic County, New Jersey; Wayne Township, 1,680 feet west of Wayne Township municipal buildings, 10 feet south of dirt road. RANGE IN CHARACTERISTICS: Solum thickness commonly ranges from 51 to 127 cm. Depth to the top of the fragipan ranges from 40 to 76 cm. Depth to red shale, sandstone, or basalt bedrock is typically more than 3 meters below the surface. Rock fragment content in the solum above a lithologic discontinuity, where present, ranges from 0 to 35 percent by volume. Rock fragment content in the fragipan and the C horizon commonly ranges from 15 to 50 percent by volume but the range in the fragipan ranges as low as 4 percent. Rock fragments larger than 8 cm in diameter, range from 0 to 15 percent by volume in the solum and from 0 to 30 percent in the C horizon. Reaction ranges from very strongly acid through slightly acid in the solum above the fragipan, from moderately acid through slightly acid in the fragipan, and from slightly acid through mildly alkaline in the C horizon. Some pedons have an O horizon. The A or Ap horizon has hue of 5YR through 10YR, value of 2 through 4, and chroma of 1 through 3. Dry value is 6 or https://soilseries.sc.egov.usda.gov/OSD_Docs/H/HASBROUCK html 113

3/31/25, 1:10 PM Official Series Description - HASBROUCK Series more. Texture is loam or silt loam in the fine-earth fraction. The E or Eg horizon has hue of 2.5YR through 10YR, value of 3 through 6, and chroma of 1 or 2. Mottles with higher value and chroma are few or common. Texture ranges from sandy loam to silt loam in the fine-earth fraction. The BEg horizon, where present, has hue of 2.5YR through 10YR, value of 3 through 6, and chroma of 1 or 2. Redoximorphic features with higher chroma are common or many. Texture ranges from fine sandy loam to silt loam in the fine-earth fraction. The Btg horizon has hue of 2.5YR through 10YR, value of 3 through 7, and chroma of 1 or 2. Redoximorphic features with higher chroma are common or many. Texture is loam, clay loam, or sandy clay loam in the fine-earth fraction. Clay content dominantly is between 20 and 30 percent. The Bx horizon has hue of 2.5YR through 10YR, value of 3 through 7, and chroma of 1 through 8. Texture is commonly loam, loam, fine sandy loam, or sandy loam. Clay content dominantly is between 10 and 20 percent. Structure is weak or moderate, medium or thick platy, and may be within weak coarse prisms. Ped coat colors are one or two units of value higher than ped interiors. The C horizon has hue of 10R through 10YR, value of 3 through 7, and chroma of 0 through 6. Texture is dominantly sandy loam but ranges from loamy sand to loam in the fine-earth fraction. Clay content is less than 10 percent. The C horizon is massive, but may have weak, very thick platy layers in the upper 60 cm. Consistence is friable or firm. COMPETING SERIES: This is the Frenchtown series. Frenchtown soils have rock fragments that are dominantly sandstone gravel. GEOGRAPHIC SETTING: Hasbrouck soils are in nearly level or gently sloping depressions, drainageways, and areas adjacent to narrow floodplains of minor streams on uplands. Slope ranges from 0 to 8 percent. The soils formed in eroded and redeposited glacial materials on till of Wisconsin Age. The till materials are composed primarily of red shales, red sandstone, and basalt. GEOGRAPHICALLY ASSOCIATED SOILS: These include the well to moderately well drained Boonton soils and the somewhat poorly drained Haledon soils which formed in till and are on the adjacent uplands. The well drained Netcong soils, which do not have a fragipan, are on sideslopes of uplands.

on soils and the somewhat poorly drained Haledon soils which formed in till and are on the adjacent uplands. The well drained Netcong soils, which do not have a fragipan, are on sideslopes of uplands. The well drained Holyoke and Yalesville soils are shallow and moderately deep soils on hills and ridges. The poorly or very poorly drained Preakness soils are on adjacent outwash plains and terraces. DRAINAGE AND PERMEABILITY: Poorly drained. Runoff is negligible to high. Permeability is moderately rapid or moderate in the solum above the fragipan, slow or very slow in the fragipan, and moderately rapid or moderate in the C horizon. Saturated hydraulic conductivity is moderately low to high in the solum and substratum and very low to moderately low in the fragipan. USE AND VEGETATION: Most of the areas are wooded. A few of the gently sloping areas are used for recreation. Native vegetation is dominated by red maple, ash, pin oak, and swamp white oak. DISTRIBUTION AND EXTENT: Northern New Jersey. The soil is of limited extent with approximately 5,000 acres mapped. MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Amherst, Massachusetts SERIES ESTABLISHED: Bergen County, New Jersey 1986. REMARKS: The Hasbrouck series replaced those soils which were previously correlated as Haledon Variant in Middlesex and Passaic Counties, New Jersey. Cation exchange activity class determined from a review of associated soils. Geographical location and coordinates could not be reliably determined from the described location. Diagnostic horizons and features recognized in this pedon include: 4. Ochric epipedon - the zone from the surface to a depth of 14 inches (A, Eg and BEg horizons). 2. Argillic horizon - the zone from 14 to 24 inches (Btg horizon). 3. Fragipan - the zone from 24 to 42 inches (Bx horizon). https://soilseries.sc.egov.usda.gov/OSD_Docs/H/HASBROUCK. html 213

3/31/25, 1:10 PM National Cooperative Soil Survey U.S.A. https://soilseries.sc.egov.usda.gov/OSD_Docs/H/HASBROUCK. html Official Series Description - HASBROUCK Series 3/3

3/31/25, 1:09 PM Official Series Description - HALEDON Series LOCATION HALEDON NJ+NY Established Series Rev. CFE-RAS-SMF 01/2013 HALEDON SERIES The Haledon series consists of very deep, somewhat poorly drained soils in low positions on undulating uplands. They formed in glacial till. Slope ranges from 0 to 15 percent. Saturated hydraulic conductivity is moderately high or high above the fragipan and very slow or slow in in the fragipan and densic materials. Mean annual temperature is about 13 degrees C and mean annual precipitation is about 1258 mm. TAXONOMIC CLASS: Coarse-loamy, mixed, active, mesic Aquic Fragiudalfs TYPICAL PEDON: Haledon cobbly loam at an elevation of about 140 m. (Colors are for moist soil.) Ap--0 to 20 cm; very dark grayish brown (10YR 3/2) cobbly loam, gray (10YR 6/1) dry; moderate medium granular structure; very friable; many roots; common fine pores; 25 percent rock fragments of stones, cobbles and gravel; moderately acid; clear wavy boundary. (15 to 25 cm thick) Bt1--20 to 41 cm; yellowish brown (10YR 5/4) cobbly loam; moderate medium subangular blocky structure; friable, slightly sticky; common roots that decrease in number with depth; common fine tubular pores; few faint brown (7.5YR 4/4) clay films on faces of peds and in sand and pebble niches; 20 percent rock fragments, dominantly cobbles and coarse gravel and some stones; common coarse and medium distinct brown (7.5YR 4/4) masses of iron accumulation, common fine and medium faint brown (10YR 5/3) iron depletions, and few fine distinct strong brown (7.5YR 5/8) masses of iron accumulation; moderately acid; gradual wavy boundary. (10 to 46 cm thick) Bt2--41 to 76 cm; yellowish brown (10YR 5/4) and brown (7.5YR 4/4) cobbly loam; moderate medium subangular blocky structure; friable; few fine roots; few fine tubular pores; brown (7.5YR 4/4) clay films on faces of peds and common bridging with semi-waxy clay films; 20 percent rock fragments, dominantly cobbles and gravel; common coarse distinct dark brown (7.5YR 3/2) iron depletions, common fine faint pale brown (10YR 6/3) masses of iron accumulation, few fine distinct strong brown (7.5YR 5/8) masses of iron accumulation, and few to common fine distinct light brownish gray (10YR 6/2) masses of iron accumulation and grayish brown (10YR 5/2) iron depletions that increase in number with depth; moderately acid; abrupt smooth