Geotechnical Engineering Report Addendum No 1 Results of Testing 01 29 2025 submission

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%

15 used (noun only; e.g., Very Gravelly VGR GRV ≥ 35% but < 60% gravel loam). Extremely Gravelly XGR GRX ≥ 60% but < 90% gravel Use adjective for Cobbly CB CB ≥ 15% but < 35% cobbles 15 to < 35 appropriate size; e.g., Very Cobbly VCB CBV ≥ 35% but < 60% cobbles gravelly. Extremely Cobbly XCB CBX ≥ 60% but < 90% cobbles Use “very” with the Stony ST ST ≥ 15% but < 35% stones 35 to < 60 appropriate size adjective; Very Stony VST STV ≥ 35% but < 60% stones e.g., very gravelly. Extremely Stony XST STX ≥ 60% but < 90% stones Use “extremely” with the Boudlery BY BY ≥ 15% but < 35% boulders 60 to < 90 appropriate size adjective; Very Bouldery VBY BYV ≥ 35% but < 60% boulders e.g., extremely gravelly. Extremely Bouldery XBY BYX ≥ 60% but < 90% boulders No adjective modifier. If ≤ Channery CN CN ≥ 15% but < 35% channers 10% fine earth, use the Very Channery VCN CNV ≥ 35% but < 60% channers appropriate noun for the ≥ 90 Extremely Channery XCN CNX ≥ 60% but < 90% channers dominant size class; e.g., Flaggy FL FL ≥ 15% but < 35% flagstones gravel. Use terms in lieu of Very Flaggy VFL FLV ≥ 35% but < 60% flagstones texture. Extremely Flaggy XFL FLX ≥ 60% but < 90% flagstones

SUBSURFACE EXPLORATION PROCEDURE: TEST PIT EXCAVATION A test pit is an excavation of subsurface materials to characterize the composition and rippability/excavation efforts. Test pit exploration allows observation of the boundary relationships within a soil and rock profile and is useful to identify existing fill composition, disturbed material or the depth of soft sediments. Both track mounted excavators and backhoes are used in a variety of ground conditions allowing for difficult terrain to be accessed. The excavation process also provides access for in-situ and field testing and acquisition of samples for laboratory testing. TEST PIT Procedure:  Involves excavation subsurface material to observe composition and physical characteristics  Recording the approximate depth of subsurface strata  Excavation is continued as prescribed or to limits of equipment and subsurface conditions  The exploration is typically carried out with an excavator or backhoe, with the depth dependent on machine size and ground

Soil Profile Report Project Name/#: Mavis #2296 - Additional Infiltration Testing Municipality: West Orange Project Location: 460 Prospect Avenue Block/Lot: Block: 105 Lot: 64.01 Driller: Sano Drilling Inspector: Maddie Trudnak / ECS Date of Observation: 1/14/2025 Lowest point in BMP (ft) = - Prepared by: JCY Maximum Impounded Water Depth (ft) = - Required Soil Profile Depth (ft) = 8.0 Exploration ID: TP-01 Elevation (ft) Existing Ground Level: 619.0 Elevations are approximate and based on Google Earth©. Proposed SWM Basin Bottom Level: - Seasonal High Water Table: - Termination: 611.0 Mark Most Top Elevation/Bottom Observed Water Table Soil Morphological USDA Soil Texture Hydraulically Elevation Elevation Note Observations Restrictive (ft.) (ft.) 10 YR 4/2 dark grayish Loamy Silt 619.0/618.5 brown, moist, blocky, Topsoil, contains roots friable

brown, moist, blocky, Topsoil, contains roots friable 7.5 YR 4/4 brown, Fill, contains metal nails, Silt Loam 618.5/617.0 moist, blocky, very plastic sprinkler system, friable roots 5 YR 3/3 dark reddish Infiltration Test at 615.0 SANDY LOAM x 617.0/611.0 Not encountered brown, moist, blocky, very friable, 10% gravel