2017-104 - Laserfiche WebLink

Home Browse Search

Subtask 1.5 CONSULTANT will also perform an additional geotechnical site investigation for the partial closure portion of this project consisting of hand auger borings on the proposed Segment 2 partial closure area to confirm the thickness and type of the existing intermediate cover material. CONSULTANT will subcontract with Keller, Schleicher and MacWilliam (KSM) Engineering and Testing to perform an estimated total of up to 25 auger borings. CONSULTANT will stake all the expected boring locations in the field before KSM Engineering and Testing arrives at the site. Once the samples have been collected and classified in the field, they will be placed in appropriate sample containers for transport to a geotechnical laboratory. Up to 12 of the collected samples will be tested in the geotechnical laboratory and evaluated by a professional geotechnical engineer licensed in the State of Florida to determine the nature of the intermediate cover (e.g., particle size, plasticity, and organic content). The proposed number of hand augers and laboratory tests are based on the anticipated variability of the composition of the intermediate cover material. This information will be logged on the existing topographic survey and used during final cover and slope stability design. This subtask also includes one SPT boring to 30 -feet below grade at the location of the proposed Segment 3 leachate pump station, SPT sampling will be performed continuously within the top 10 -feet, and then at 5 -feet intervals thereafter. The boring will be field located based on the boring location plan provided by CONSULTANT. Four grain size analyses will be performed and a boring log with laboratory data will be provided. Based on the results of the evaluation, an engineering design memo will be prepared that includes the following: • Summary of previous geotechnical investigations and available data; • Results of the additional testing performed; • Logs of the test holes; • Diagram of the site/boring layout; • Veneer slope stability analyses; • Geocomposite drainage transmissivity analyses; • Global slope stability analyses; and • Settlement analyses. Initial Coordination with the Florida Department of Environmental Protection This subtask includes the initial coordination with FDEP to discuss the procedure to notify them of the intent to finalize design and construct the previously permitted cell expansion and confirm permitting or notification of the final design and construction of the Segment 2 partial closure and landfill gas expansion. CONSULTANT will prepare for and attend a telephone conference with SWDD and FDEP. Results of this initial coordination will be used to define the regulatory support/permitting assistance services that will be needed and performed under a subsequent phase of this project. Included in this subtask are discussions of what will be required for the Environmental Resource Permit and NPDES permit. CONSULTANT will prepare and distribute meeting minutes after the conference call. A-3 jj2046_Exhibits.docx