Stormwater Management Report 03302026

Client: Gomes Management Project: 525 Northfield Avenue, West Orange, NJ Page: 9 Date: 09/03/2024 Protection of Utilities: Existing utilities, in the area of construction should be marked to protect from damage during excavation and foundation construction. Excavations should be stopped if they could potentially undermine existing utilities. Excavation &side slope: An unbraced excavation slope of 2.0 horizontal to 1 vertical or flatter may be considered in the planning for construction. Sheeting and bracing, and or slope stabilization systems should be used wherever the unbraced slope pass beneath utilities or structures, the active roadway arrears and/or where it is found to be necessary or more cost effective to use sheeting in order to limit the size of the excavations and maintain traffic. Sheeting and bracing systems and excavation slopes may be designed using the soil properties presented in summary table provided earlier. Proof rolling and compaction of Pavement and Fill Subgrades: Following stripping or excavation to plan elevations, all subgrades for placement of new foundation or parking lot pavement should be proof rolled using a vibratory roller with minimum 1 ton static weight in confined areas along side walls and 10 tons static weight in the footprint of the building and general roadway paved areas. Footing subgrades should be compacted with small area vibratory plate compactors. Proof rolling should be observed and evaluated by a qualified Geotechnical engineer or technician familiar with site conditions. MINIMUM PAVEMENT DESIGN SECTIONS: ACCESS ROAD AND TRUCK TRAFFIC AREAS Bituminous Concrete Surface Course (NJDOT I-5) 2 inches Bituminous Concrete Base Course (NJDOT I-2) 4 inches Quarry Process Sub-Base Course (NJ DOT DGA) 6 inches TOTAL SECTION THICKNESS 12 inches AUTOMOBILE PARKING AREAS Bituminous Concrete Surface Course (NJDOT I-5) 2 inches Bituminous Concrete Base Course (NJDOT I-2) 3 inches Quarry Process Sub-Base Course (NJ DOT DGA)

rse (NJDOT I-5) 2 inches Bituminous Concrete Base Course (NJDOT I-2) 3 inches Quarry Process Sub-Base Course (NJ DOT DGA) 4 inches TOTAL SECTION THICKNESS 9 inches As previously discussed, it is recommended that the loose soils at the surface should be proof rolled and densified with a heavy vibratory compactor. With this recommended compaction, a CBR value of six (6) would be appropriate for use in the design of flexible pavements over site soils with imported granular fill, the CBR could be about eight (8). RECOMMENDED SERVICES It is recommended that we should be retained to provide continuous observation and Soil engineering services during the excavation and foundation construction phases of the work. This is to observe compliance with the design concepts, specifications and recommendations, and to allow design charges in the event that subsurface conditions differ from those anticipated prior to start of construction. LIMITATIONS: The recommendations contained in this report are our best professional judgment as

Client: Gomes Management Project: 525 Northfield Avenue, West Orange, NJ Page: 10 Date: 09/03/2024 to be followed in the design and construction of the proposed project. There may be subsurface conditions not disclosed by the explorations adequately identify subsurface conditions for the purpose of this study. If during construction any differences are found between the report of the explorations and the actual subsurface conditions, they should be brought to our attention immediately so that the effect in our recommendations can be evaluated. This report has been prepared in accordance with generally accepted Geo-technical Engineering practices for the exclusive use of our client, Gomes Management and their designated representative(s). No other warranty, express or implied, is made. Contractors' wishes to use the soil boring information may do at their own risk. Unless specifically indicated to the contrary in this report, this report does not address environmental considerations, which may affect the site development. The conclusions and recommendations of this report are not intended to supersede or overlook any N.J.D.E.P. Environmental conditions, which should be reflected in the site planning. Should you have any questions or require additional information, please do not hesitate to contact the undersigned at (908)754-8383. Sincerely,. ANS Consultants, Inc, Atulkumar N. Shah, PE, PP, F. ASCE President NJ PE License #24G~03443900 ANS/RM Reported: Gomes Management— (3); File — (1) File: ANV-6549 01.SB

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DRILL HOLE LOG BORING NO.: B-1 PROJECT: Proposed 1-story retail building PROJECT NO.: ANV-6549 CLIENT: Gomes Management DATE: 8-21-2024 LOCATION: 525 Northfield Avenue, West Orange, NJ ELEVATION: N/A DRILLER: JESUS, David & A. SHAH LOGGED BY: Krunal Parmar DRILL RIG: ACKER XLS DEPTH TO WATER> INITIAL AT COMPLETION s ELEVATION/ WELL SOIL SYMBOLS, STANDARD PENETRATION TEST SAMPLERS USCS Description NM DD CURVE DEPTH DETAIL AND TEST DATA DEPTH N —o 10 30 50 FILL 0'-2' 6 'J Fill material containing very dark gray, brown silt, trace f/c gravel, trace wood chip, moist, soft. FILL Fill material containing brown, black 2'-4' 13 silt, trace fine gravel, trace wooden -3 chip, moist, medium stiff. @ 2'-7": Brown silt, trace f/c sand, SM/GM 'some f/c ~ravel~ moist, medium stiff. 4'-4'3" 50/ Brown silt, trace f/c sand, coarse gravel at tip of the spoon, moist, dense.

c sand, coarse gravel at tip of the spoon, moist, dense. • 13 SP/GP Spoon Refusal @ 4'-3". -6 6'-7'5" 137 Augured down to 6 feet. Reddish brown and purple f/c sand and f/c gravel, trace silt, slightly SP/GP moist, very dense. Spoon Refusal @ 7'-5". 8'-10' 53 r - 9 Augured down to 8 feet. Reddish brown f/c sand and f/c gravel, trace silt, slightly moist, very dense. • SP-SM Brown f/c sand, trace silt, some f/m 10'-10'8" 50/ gravel, slightly moist. Spoon Refusal @ 10'-8". Augur Refusal @ 11'-4". — lz End of boring. —15 —18 —21 This information pertains only to this boring and should not be interpreted as being iadicitive of the site. FIrnIrP. PAC~F 1 ~f 1 ANS CONSULTANTS_ INC_

DRILL HOLE LOG BORING NO.: B-2/B-2A PROJECT: Proposed 1-story retail building PROJECT NO.: ANV-6549 CLIENT: Gomes Management DATE: 8-21-2024 LOCATION: 525 Northfield Avenue, West Orange, NJ ELEVATION: N/A DRILLER: JESUS, David & A. SHAH LOGGED BY: Krunal Parmar DRILL RIG: ACKER XLS DEPTH TO WATER> INITIAL s AT COMPLETION ELEVATION/ WELL SOIL SYMBOLS, STANDARD PENETRATION TEST SAMPLERS uscs Description NM DD DEPTH N CURVE DEPTH DETAIL AND TEST DATA 10 30 50 —o 11- FILL Asphalt: 4.5". 0'-1'11" 25 11- Fill material containing reddish brown 14- f/c sand, trace silt, some f/c gravel, 29/ 5 moist. 4- FILL Spoon refusal @ 1'-11". 2'-4' 12 5- ~- Augur refusal @ 1'-11" —3 Augured down to 2 feet. s Fill material containing brown silt, trace f/c sand, trace fine gravel, trace 6- lo- ls-