Stormwater Management Report Feb 2026 resubmissionrcd 2 26 2026

Mavis #2296 Additional Exploration January 29, 2025 ECS Project No. 44-2100-A Page 4 It has been our pleasure to be of service during this phase of the project. Please note, ECS is not responsible for the conclusions, opinions, or recommendations of others based on the data contained in this letter and its associated attachments. Should you have any questions concerning the information contained herein, or if we can be of further assistance to you, please contact us. Respectfully, ECS MID-ATLANTIC, LLC Jeffrey C. Yates, P.E. Stephen F. Patt, P.E. Geotechnical Department Manager Geotechnical Principal Engineer jcyates@ecslimited.com spatt@ecslimited.com Attachments: Attachment 1 – Drawings and Reports Attachment 2 - Test Pit and Infiltration Logs Attachment 3 - Laboratory Testing

Attachment 1 Drawing and Reports

² Service Layer Credits: World Boundaries and Places: Sources: Esri, HERE, Garmin, FAO, NOAA, USGS, © OpenStreetMap SITE ENGINEER SITE LOCATION DIAGRAM JCY SCALE Mavis #2296 - West Orange, NJ 1" = 200' PROJECT NO. 44:2100 460 Prospect Avenue SHEET West Orange, New Jersey 1 DATE Mavis Tire Supply, LLC 12/10/2024

² Service Layer Credits: World Boundaries and Places: Sources: Esri, HERE, Garmin, FAO, NOAA, USGS, © OpenStreetMap B-01 TP-03 B-04 TP-05 B-03 SITE B-07 TP-04 B-02 B-08 B-05 TP-01 TP-02 B-06 Legend Approximate Previous Boring Locations - B Drilled November 22, 2024 Approximate Test Pit Locations - TP Excavated January 14, 2025 ENGINEER EXPLORATION LOCATION DIAGRAM JCY SCALE Mavis #2296 - Additional Infiltration 1" = 40' PROJECT NO. 460 Prospect Avenue 44:2100-A West Orange, New Jersey SHEET DATE Mavis Tire Supply, LLC 1/20/2025

SITE Map Unit Symbol Map Unit Name USBONB Urban land, Boonton substratum - Boonton complex, 0 to 8 percent slopes URBONB Urban land, Boonton substratum - Boonton complex, 0 to 8 percent slopes USBONC Urban land, Boonton substratum - Boonton complex, 8 to 15 percent slopes Source: Web Soil Survey NORTH Mavis Store #2296 460 Prospect Avenue SOIL SURVEY MAP West Orange, NJ ECS Project 44:2100 December 10, 2024 Mavis Tire Supply

SITE Qwf Qwtr Geologic Formation Name Lithology Notes (Abbreviation) Clayey silt to sandy silt with some to many pebbles and cobbles and few boulders; reddish Rahway Till Deposited directly from glacial ice during brown, reddish yellow, yellowish brown, brown. (Qwtr) the late Wisconsinan glaciation. As much as 100 feet thick, generally less than 40 feet thick. Form plain and terraces (undifferentiated) deposited by glacial streams during the late Late Wisconsinan Sand and pebble-to-cobble gravel, minor silt; Wisconsinan glaciation. Where plains and Glaciofluvial Deposits yellowish brown to reddish brown. As much as terraces are differentiated they are (Qwf) 50 feet thick. mapped separately as units Qwfv and Qwft, respectively Source: NJ-Geoweb (Surficial Geology) NORTH Mavis Store #2296 460 Prospect Avenue SURFICIAL GEOLOGY MAP West Orange, NJ ECS Project 44:2100 Mavis Tire Supply December 10 2024

SITE Jo JTrps Stratigraphic Unit Name Stratigraphic Unit Lithology (Abbreviation) Number Orange Mountain Basalt 3,700 Basalt, fine-to-medium-grained (Jo) Passaic Formation Sandstone and Siltstone 4,500 Sandstone and siltstone Facies (JTprs) Source: NJ-Geoweb (Regional Geology) NORTH Mavis Store #2296 460 Prospect Avenue REGIONAL GEOLOGY MAP West Orange, NJ ECS Project 44:2100 Mavis Tire Supply December 10, 2024

Attachment 2 Test Pit and Infiltration Logs Test Pit Photolog

U.S. Department of Agriculture (USDA) Soil Classification System Texture Triangle Fine Earth Texture Classes ( ) Texture Class Code Texture Class or Subclass Conv. NASIS Coarse Sand cos COS Sand s S Fine Sand fs FS Very Fine Sand vfs VFS Loamy Coarse Sand lcos LCOS Loamy Sand ls LS Loamy Fine Sand lfs LFS Loamy Very Fine Sand lvfs LVFS Coarse Sandy Loam cosl COSL Sandy Loam sl SL Fine Sandy Loam fsl FSL Very Fine Sandy Loam vfsl VFSL Loam l L Silt Loam sil SIL

Silt Loam sil SIL Silt si SI Sandy Clay Loam scl SCL Clay Loam cl CL Silty Clay Loam sicl SICL Sandy Clay sc SC Silty Clay sic SIC Clay c C Texture Modifiers – (Adjectives) Texture Modifiers – Conventions for using “Rock Code Criteria: Percent (by volume) of Fragment Texture Modifiers” and for using Rock Fragments: PDP/ total rock fragments and Size and Quantity Conv. textural adjectives that convey the “% volume” NASIS dominated by (name size): ranges for Rock Fragments – Size and Quantity. Rock Fragments (> 2mm; ≥ Strongly Cemented) Gravelly GR GR ≥ 15% but < 35% gravel Fragment Content Rock Fragment Modifier Fine Gravelly FGR GRF ≥ 15% but < 35% fine gravel % By Volume Usage Medium Gravelly MGR GRM ≥ 15% but < 35% med. gravel No texture adjective is Coarse Gravelly CGR GRC ≥ 15% but <35% coarse gravel < 15 used (noun only; e.g., Very Gravelly VGR GRV ≥ 35% but < 60% gravel loam). Extremely Gravelly XGR GRX ≥ 60%