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Village of EsteroSunny Isles Beach RFQ 18-02-01 | Marine and Coastal Professional Engineering Consulting Services <br />GEOTECHNICAL ENGINEERING <br />APPROACH The Geotechnical Engineering Services under this contract will be provided by GFA International, Inc. (GFA) staff. <br />Approach to Services – Geotechnical services typically involve five critical steps. First, preliminary field work must be done. A geotechnical engineer collaborates with a client representative to determine project objectives. The engineers will determine appropriate locations and depths for taking soil samples. Boring locations will include areas where structures, pump stations, levees, culverts and water control structures require geotechnical data.In addition, engineers will develop preliminary concepts for drainage that may be required. A thorough proposal will be developed detailing a scope of services, fees and report submittal milestones.The second step, exploration, begins with drilling and recovering soil and rock samples using such techniques as standard penetration testing, rock coring, cone penetrometer soundings and/or vibracore sampling. Our drillers are versed in all these type of drilling techniques. A geotechnical engineer will take a series of soil/sand samples from each of the defined boring locations, paying special attention to recovered materials and penetrating resistance. If adjustments need to be made to the field sampling plan, then the field engineer will make appropriate arrangements with the field crews after discussing this with the client. Laboratory tests and sample review is the third stage (materials testing). All soil samples obtained by GFA in <br />field investigations are thoroughly examined visually in our laboratory in accordance with ASTM D-2488 to obtain an accurate definition of the geomorphic conditions and properties of the soil. Engineers evaluate soil samples for strength, moisture, density and other characteristics and properties. Random laboratory tests are performed on soils within the foundation bearing depths to verify visual classifications. These tests may consist of gradation analysis and organic content testing on soil samples. The GFA team then develops final detailed boring logs which depict the soils encountered. These boring logs illustrate the soils encountered in graphic detail and penetration resistance values logged during drilling and sampling activities.A geotechnical report is the fourth step in the process. It provides a detailed analysis of subsurface conditions at the study location. • How will existing subsurface soil and bedrock such as limestone or sandstone perform as bearing materials for the planned construction? • What about soils that have been manipulated previously? • What type of fill was used? • Was it uncontrolled fill that has been dumped, but not compacted, or structural fill that has been compacted? • Does the fill include buried debris? • How can the contractor modify this material to ensure the load-bearing characteristics? Our team will then make the appropriate evaluations <br />14