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City of Sunny Isles Building Department Relocation Geotechnical Exploration Report <br />Sunny Isles Beach, FL March 29, 2024 <br />UES Project No.: 0630.2400024.0000 <br /> <br /> <br />This item has been digitally signed and sealed by <br />[Alberto J. Mercado] on the date adjacent to the seal. <br />Printed copies of this document are not considered <br />signed and sealed and the signature must be verified <br />on any electronic copies. <br />The subsurface conditions encountered generally consisted of 3” to 3.5” of asphalt atop <br />very loose to medium dense, fine to medium grained sand with varying amounts of <br />limestone and shell fragments from ground surface to the approximate depths of 10 to 13 <br />feet below ground surface (BGS). The following layers consisted of very loose to medium <br />dense, fine to medium grained sand with varying amounts of silt to a depth 20 to 22 feet <br />BGS, underlain by limestone fragments with sand to the termination depth of the borings at <br />24 feet BGS. Sand with organics were encountered at boring B01 at the approximate <br />depths of 9 to 10 feet and 20 to 22 feet BGS. The SPT N values ranged between 1 to 32 <br />blows per foot. <br /> <br />Groundwater at the time of testing (March 2024) was encountered at an approximate depth <br />of 5’1” to 5’4” BGS. <br /> <br />Based on the subsurface conditions and given that the existing structure is supported by <br />deep foundations, to avoid differential settlement, UES recommends supporting the single- <br />story addition on deep foundations as well, to transmit the loads to the competent dense <br />soils. Deep foundation system that may be utilized is helical piers. Design and installation <br />criteria for helical piers have been provided herein. <br /> <br />UES appreciates the opportunity to be of service to you on this project and looks forward <br />to a continued association with BEA Architects, Inc. Please contact the undersigned if you <br />have any questions or comments or if UES may further assist you as your plans proceed. <br /> <br />Respectfully Submitted, <br /> <br />UES <br />Registry No. 4930 <br /> <br /> <br /> <br /> <br /> <br />David Lopez, E.I. <br />Staff Engineer <br /> <br /> <br /> <br />Alberto J. Mercado, P.E. <br />Geotechnical Department Manager <br />Professional Engineer #95703 <br />State of Florida <br /> <br /> <br />