SHI Builders West Orange NJ Prelim GI SWM Report 1

The soil borings, soil profile pits, and test pits were completed in the presence of a Dynamic Earth engineer who performed field tests, recorded visual classifications, and collected samples of the various strata encountered. The test locations were located in the field using conventional taping procedures with estimated right angles, and are presumed to be accurate within several feet of the location plotted on the plans. Soil borings and standard penetration tests (SPTs) were conducted in general accordance with ASTM D6151 (Standard Practice for Using Hollow-Stem Augers for Geotechnical Exploration and Soil Sampling). Standard penetration tests (SPTs) were conducted in general accordance with ASTM D1586 (Standard Test Method for Standard Penetration Test and Split Barrel Sampling of Soils). The SPT resistance value (N) is used in conjunction with many correlations which relate to blow count, or SPT N-value to engineering behavior of soils to develop foundation and earthwork recommendations. The soils encountered within the area of the proposed/anticipated stormwater management areas were classified using the United States Department of Agriculture (USDA) Classification System. Observations were made for groundwater and/or soil mottling and mineral deposits potentially indicative of zones of saturation or seasonal high groundwater. The results of our preliminary stormwater basin soils area investigation are included herein. Groundwater level observations were recorded during and at the completion of field operations prior to backfilling the borings. Seasonal variations, temperature, anthropogenic activities, seasonality, soil permeability, and precipitation will influence the actual and observed groundwater levels. Groundwater elevations derived from sources other than seasonally observed groundwater monitoring wells may not be representative of true groundwater levels. A Phase I Site Assessment was also completed by Dynamic Earth and was issued under an April 18, 2022 Phase I Environmental Site Assessment. 3.2 Laboratory Testing Program Physical/Textural Analysis: Each sample was visually classified in general accordance with ASTM D2488. In addition, representative samples of selected strata encountered were subjected to a laboratory testing program which included, moisture content determinations (ASTM D2216), Atterberg limits (ASTM D4318),

ition, representative samples of selected strata encountered were subjected to a laboratory testing program which included, moisture content determinations (ASTM D2216), Atterberg limits (ASTM D4318), and washed gradation analyses (ASTM D6913) in order to perform supplementary engineering soil classifications in general accordance with ASTM D2487 (Unified Soil Classification System). The results of the laboratory testing are summarized in the following table: SHI Builders 3 4266-99-001E