Attachment D - GEO RPT_City of Sunny Isles BLDG Dept Relocation_S&S UPLOADED

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City of Sunny Isles Building Department Relocation Geotechnical Exploration Report Sunny Isles Beach, FL March 29, 2024 UES Project No.: 0630.2400024.0000 Page 6 of 9 The latitude, longitude, and elevation noted in UES’s boring logs were taken from Google Earth. Google Earth uses WGS-84 or Local Mean Sea Level (MSL) as datum. It should be noted that elevations may not always be correct if fill is added or site grades change to a site after Google captures the image. The boring location and elevations noted should, therefore, be considered approximate. The boring depths were confined to the zone of soil likely to be stressed by the proposed construction. The boring log depicts the observed soils in graphic detail. The Standard Penetration Test boring indicates the penetration resistance, or N- values logged during the drilling and sampling activities. 3.0 SUBSURFACE CONDITIONS The subsurface conditions encountered generally consisted of 3” to 3.5” of asphalt atop very loose to medium dense, fine to medium grained sand with varying amounts of limestone and shell fragments from ground surface to the approximate depths of 10 to 13 feet below ground surface (BGS). The following layers consisted of very loose to medium dense, fine to medium grained sand with varying amounts of silt to a depth 20 to 22 feet BGS, underlain by limestone fragments with sand to the termination depth of the borings at 24 feet BGS. Sand with organics were encountered at boring B01 at the approximate depths of 9 to 10 feet and 20 to 22 feet BGS, and at boring B02 at the approximate depths of 18 to 20 feet BGS. The SPT N values ranged between 1 to 32 blows per foot. Please refer to the attached boring logs in Appendix A for complete and detailed descriptions of the soils and relative density condition encountered at each test boring completed for this study. 3.1 Groundwater Conditions Groundwater at the time of testing (March 2024) was encountered at an approximate depth of 5’1” to 5’4” feet BGS. The groundwater table will fluctuate seasonally depending upon local rainfall, and other local influences. Higher temporary water levels may be possible at this site after extended periods of rain. This is based upon the existing static groundwater levels at the time of UES’s exploration and anticipating groundwater table rise through the type of soils encountered during the exploration. No additional investigation was conducted in relation to any existing well field in the vicinity. Well fields can influence water table levels and cause significant fluctuations. If a more comprehensive water table analysis is necessary, UES recommends contacting a registered professional specialized in hydrogeology.