Geotech Report 04 19 2021

SOR CONSULTING ENGINEERS, INC. Garden Homes Report No. 21-C-12 Proposed Residential Development Page 5 West Orange, NJ and may not necessarily represent the actual variations between the boring and test pit explorations. Individual strata consist of the following generalized materials in order of increasing depths: 1) 2 3) 4) 5) Surface Material: Approximately 4 to 24 inches of topsoil/vegetation was revealed at the ground surface. Fill: Fill consisting of silty gravelly sand was encountered in Test Pit 20. The fill was in a medium dense to dense condition and extended to a depth of 13 feet. Test Pit 19 was excavated on top of soil mound and extended to a depth of 8 feet. Brown to dark brown sandy silty clay type soil was encountered. The fill was mixed with asphalt/concrete pieces, wood fragments and cobbles/boulders. The fill at the mound was in a soft condition. Clayey Silt/Sandy Silt: Natural residual soils consisting of yellowish brown to gray and yellowish brown sandy silt and clayey silt were generally encountered beneath the topsoil in the majority of the explorations. The sandy silt/clayey silt generally ranged from 1 to 5 feet in thickness. Standard Penetration Test (N) values obtained from the borings indicate that the sandy silt/clayey silt are in a soft to firm consistency. Silty Gravelly Sand: Brown silty gravelly sand containing numerous cobbles and frequent large boulders as well as occasional pockets of clay was encountered either beneath the topsoil or clayey silt in a majority of the explorations. This stratum was in a medium dense to dense condition. Test Pits 10, 16, 22, 23, 26 and 27 were terminated within this layer at depths of 10 to 13 feet below surface grades. Bedrock: Basalt bedrock was encountered in the explorations and is anticipated to underlie the entire site at depths generally ranging from 4 to 12 feet beneath the surface. However, bedrock was encountered at depths of 1.5 to 3 feet beneath the ground surface in Test Pits 3, 4, 5, 9, 11, 18, 21 and Borings 5 and 10. Basalt is a very dense fine grained igneous rock. The backhoe and drill rig used for this study was unable to excavate/drill to any measurable extent into the bedrock.